Jet Tools 20T, 20PFT, 20PF, GHD-20 User Manual

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Operating Instructions and Parts Manual

Geared Head Drilling/Tapping Presses

Models GHD-20/20T/20PF/20PFT

For models with serial no. 130701360 and higher

JET

Model GHD-20PFT shown

Warranty and Service

JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday.

Warranty Period The general warranty lasts for the time period specified in the literature included with your product or on the official JET branded website.

• JET products carry a limited warranty which varies in duration based upon the product. (See chart below)

• Accessories carry a limited warranty of one year from the date of receipt.

• Consumable items are defined as expendable parts or accessories expected to become inoperable within a

reasonable amount of use and are covered by a 90 day limited warranty against manufacturer’s defects.

Who is Covered

This warranty covers only the initial purchaser of the product from the date of delivery.

What is Co vered

This warranty covers any defects in workmanship or materials subject to the limitations stated below. This warranty does not cover failures due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear, improper repair, alterations or lack of maintenance.

Warranty Limitations

Woodworking products with a Five Year Warranty that are used for commercial or industrial purposes default to a Two Year Warranty. Please contact Technical Service at 1-800-274-6846 for further clarification.

How to Get Technical Support Please contact Technical Service by calling 1-800-274-6846. Please note that you will be asked to provide proof of initia l p u rch a s e whe n calling. If a product requires further inspection, the Technical Service representative will

explain and assist with any additional action needed. JET has Authorized Service Centers located throughout the United States. For the name of an Authorized Service Center in your area call 1-800-274-6846 or use the Service Center Locator on the JET website.

More Informa tion

JET is constantly adding new products. For complete, up-to-date product information, check with your local distributor or visit the JET website.

How S tate Law Applies

This warranty gives you specific legal rights, subject to applicable state law.

Limitations on This Warranty

JET LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR EACH PRODUCT. EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

JET SHALL IN NO EVENT BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR FOR INCIDENTAL, CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.

JET sells through distributors only. The specifications listed in JET printed materials and on official JET website are given as general information and are not binding. JET reserves the right to effect at any time, without prior notice, those alterations to parts, fittings, and accessory equipment which they may deem necessary for any reason whatsoever. JET

Product Listing with Warranty Period

90 Days – Parts; Consumable items; Light-Duty Air Tools 1 Year – Motors; Machine Accessories; Heavy-Duty Air Tools; Pro-Duty Air Tools 2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories; Woodworking Machinery used for industrial or commercial purposes 5 Year – Woodworking Machinery Limited Lifetime – JET Parallel clamps; VOLT Series Electric Hoists; Manual Hoists; Manual Hoist Accessories; Shop Tools; Warehouse & Dock products; Hand Tools

NOTE: JET is a division of JPW Industries, Inc. References in this document to JET also apply to JPW Industries, Inc., or any of its successors in interest to the JET brand.

branded products are not sold in Canada by JPW Industries, Inc.

Warranty and Service ............................................................................................................................................ 2

Table of Contents .................................................................................................................................................. 3

Warning ................................................................................................................................................................. 4

Introduction ........................................................................................................................................................... 6

Specifications ........................................................................................................................................................ 6

Unpacking ............................................................................................................................................................. 7

Contents of the Shipping Contain e r .................................................................................................................. 7

Assembly ............................................................................................................................................................... 7

Adjusting the Head Height ................................................................................................................................. 8

Adjusting the Rack Ass e mbly ............................................................................................................................ 8

Controls ................................................................................................................................................................. 9

Control Panel for GHD-20T/20PFT ............................................................................................... .................. 10

Electrical Connections ......................................................................................................................................... 10

Adjustments ........................................................................................................................................................ 11

Installing a Drill Chuck (not inclu ded) .............................................................................................................. 11

Removing the Arbor ........................................................................................................................................ 11

Adjusting the Depth Stop for Drilling (GHD-20) ............................................................................................ 11

Adjusting Depth Stop for Drilling and Tapping (GHD-20T) .............................................................................. 11

Adjusting the Depth Stop for Drilling (GHD-20PF) .............................................................................. ............ 12

Adjusting the Depth Stop for Drilling (GHD-20PFT) ............................................................................. ........... 12

Adjusting the Depth Stop for Tapping (GHD-20PFT) ...................................................................................... 12

Changing Spindle Speeds ............................................................................................................................... 12

Return Spring Adjus tment ............................................................................................................................... 13

Tilting the Head ............................................................................................................................................... 13

Lubrication ........................................................................................................................................................... 13

Changing the Gear Box Lubricant ................................................................................................................... 14

Replacement Parts .............................................................................................................................................. 16

GHD-20PF/20PFT Head Assembly ................................................................................................................. 17

Parts List – GHD-20PF/20PFT Head Assembly .............................................................................................. 18

GHD-20/20T Head Assembly .......................................................................................................................... 21

Parts List – GHD-20/20T Head Assembly ....................................................................................................... 22

Gear Assembly GHD-20PF, 20PFT ................................................................................................................ 24

Parts List – Gear Assembly GHD-20PF, 20PFT ............................................................................................. 25

Gear Assembly GHD-20/20T .......................................................................................................................... 26

Parts List – Gear Assembly GHD-20/20T ....................................................................................................... 27

Base, Table and Column Assembly (all models) ............................................................................................. 28

Parts List – Base, Table and Column Assembly (all models) .......................................................................... 29

Control Box Assembly (all models) ................................................................................................................. 30

Parts List – Control Box Assembly .................................................................................................................. 31

Electrical Panel Components (GHD-20PFT) ................................................................................................... 32

Parts List – Electrical Panel Components (GHD-20PFT) ................................................................................ 33

Electrical Schematic (GHD-20/20PF on ly) ...................................................................................................... 34

Electrical Schematic (GHD-20PFT) ................................................................................................................. 35

Electrical Schematic (GHD-20T) ..................................................................................................................... 36

Warning

1. Read and understand the entire owner’s manual before attempting assembly or operation.

2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with all of

these warnings may cause serious injury.

3. Replace the warning labels if they become obscured or removed.

4. This drill press is designed and intended for use by properly trained and experienced personnel only. If you

are not familiar w ith the pro per and sa fe operation of a drill press, do not use until proper training and knowledge have been obtained.

5. Do not use this drill press for other than its intended use. If used for other purposes, JET disclaims any real

or implied warranty and holds itself harmless from any injury that may result from that use.

6. Do not use this machine in damp or wet locations, or expose it to rain. Keep work area well lighted.

7. Always wear approved safety glasses/face s hields while using this drill pre ss. (Everyday eyeglasses only

have impac t resi st ant le n se s; t he y ar e not sa fety g lasses. )

8. Before operating this drill press, remove tie, rings, watches and other jew elry, and roll sleeves up past the

elbows. Remove all loose clothing and confine long hair. Non-slip footwear or anti-skid floor strips are recommended. Do not wear gloves.

9. Wear ear protectors (plugs or muffs) during extended periods of operation.

10. Some dust created by power sanding, sawing, grinding, dril ling and other construction activities contains

chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

• Lead from lead based paint.

• Crystalline silica from bricks, cement and other masonry products.

• Arsenic and chromium from chemically treated lumber.

Your risk of exposure varies, depending on how often you do this type of work. To reduce your exposure to these chemicals, work in a well-ventilated area and work with approved safety equipment, such as face or dust masks that are specifically designed to filter out microscopic particles.

11. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.

12. Make certain the switch is in the OFF position before connecting the machine to the power supply.

13. Clamp the workpiece or brace it against the column to prevent rotation.

14. Use the recommended speed for drill accessories and workpiece materials.

15. Make certain the machine is properly grounded.

16. Make all machine adjustments or maintenance with the machine unplugged from the power source.

17. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adj usting wrenches

are removed from the machine before turning it on.

18. Keep safety guards in place at all times when the machine is in use. If removed for maintenance purposes,

use extreme caution and replace the guards immediately after maintenance is complete.

19. Check damaged parts. Before further use of the machine, a guard or other part that is damaged should b e

carefully checked to determine that it will operate properly and perform its intended function. Check for alignment of moving parts, binding of m oving parts, breakage of parts, mounting and any ot her conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced.

20. Provide for adequate space surrounding work area and non-glare, overhead lighting.

21. Keep the floor around the machine clean and free of scrap material, oil and grease.

22. Keep visitors a safe distance from the work area. Keep children away.

23. Make your workshop child proof with padlocks, master switches or by removing starter keys.

24. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are

careless acts that can result in serious injury.

25. Maintain a balanced stance at all times so that you do not fall or lean against the rotating spi ndle or other

moving parts. Do not overreach or use excessive force to perform any machine operation.

26. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for which

it was not designed. The right tool will do the job better and more safely.

27. Use recommended accessories; improper accessories may be hazardous.

28. Maintain tools with care. Keep cutting tools sharp and clean for the best and safest performance. Follow

instructions for lubricating and changing accessories.

29. Make sure the workpiece is sec urely attached or clamped to the table. Never use your hand to hold t he

work piece.

30. Turn off the machine and disconnect from power before cleaning. Use a brush or compressed air to

remove chips or debris — do not use your hands.

31. Do not stand on the machine. Serious injury could occur if the machine tips over.

32. Never leave the machine running unattended. Turn the power off and do not leave the machine until it

comes to a complete stop.

33. Remove loose items and unnecessary work pieces from the area before starting the machine.

Familiarize yourself with the following safety notices used in this manual:

This means that if precautions are not heeded, it may result in minor injury and/or

possible machine damage.

This means that if precautions are not heeded, it may result in serious or even fatal

injury.

- - SAVE THESE INSTRUCTIONS - -

Introduction

This manual is provided by JET covering the saf e operation and mai ntenance procedures f or JE T Model GHD20 Series Drill Presses. This manual contai ns instr uctions on instal lation, saf ety preca utions, general operat ing procedures, maintenance instructions and parts b reakdown. Thi s machine has bee n de signed and co nstructed to provide years of trouble free operation if used in accordance with instructions set forth in this manual. If there are any questions or comments, please contact either your local supplier or JET. JET can also be reached at our web s ite: www.jettool s.com.

Specifications

Model Numbe r .....................................................

Stock Number ....................................................... 354020 ..................... 354024 ....................... 354022 .................... 354026

Drilling Capac ity – Cast Iron (in.) .............................. 1-1/2 ......................... 1-1/2 .......................... 1-1/2 ........................ 1-1/2

Drilling Capac ity – Mild Steel (in.)............................. 1-1/4 ......................... 1-1/4 .......................... 1-1/4 ........................ 1-1/4

Column Diameter (in.) ............................................... 4-1/2 ......................... 4-1/2 .......................... 4-1/2 ........................ 4-1/2

Quill Diameter (in.) .......................................................... 3 ............................... 3 ................................. 3 ...............................3

Swing (in.) ..................................................................... 20 ............................. 20 ............................... 20 ............................ 20

Number of Spindle Speeds ........................................... 12 ............................. 12 ............................... 12 ............................ 12

Range of Spindle Speeds (RPM)............[all models] Low: 60/130/230/450/800/1500; High: 120/260/460/900/1600/3000

Number of Power Downfeeds ...................................... n/a ............................... 3 .............................. n/a ...............................3

Range of Power Downfeeds ........................................ n/a ....0.004, 0.007, 0.01 .............................. n/a ... 0.004, 0.007, 0.01

Spindle Taper ............................................................ MT-3 .........................MT-3 .......................... MT-3 ........................ MT-3

Spindle Travel, manual (in.) ............................................ 5 ......................... 4-1/2 ................................. 5 ........................ 4-1/2

Spindle Travel, powerfeed (in.).................................... n/a ......................... 4-1/4 .............................. n/a ........................ 4-1/4

Maximum Distance Spindle to Table (in.) .............. 30-1/2 ....................... 30-1/2 ........................ 30-1/2 ...................... 30-1/2

Maximum Distance Spindle To Base (in.) ............ 44-5/16 ..................... 44-5/16 ...................... 44-5/16 .................... 44-5/16

Table Size (in.) .......................................... 21-3/4 x 19-1/2 ........ 21-3/4 x 19-1/2 .......... 21-3/4 x 19-1/2 ........ 21-3/4 x 19-1/2

Table Travel (in.) ..................................................... 25-1/2 ....................... 25-1/2 ........................ 25-1/2 ...................... 25-1/2

Table T-Slots ................................................................... 2 ............................... 2 ................................. 2 ...............................2

Table T-Slot Size (in.) .................................................. 5/8 ............................ 5/8 .............................. 5/8 ........................... 5/8

Table T-Slot Centers (in.) ............................................... 9 ............................... 9 ................................. 9 ...............................9

Work Table Weight Capacity (lbs.) ............................. 275 ........................... 275 ............................. 275 .......................... 275

Base Dimensions LxWxH (in.) ........................ 26 x 18 x 5 ............... 26 x 18 x 5 ................. 26 x 18 x 5 ...............26 x 18 x 5

Base Work Table (in.) ..................................... 15-1/4 x 13 ............... 15-1/4 x 13 ................ 15-1/4 x 13 .............. 15-1/4 x 13

Base T-Slots.................................................................... 2 ............................... 2 ................................. 2 ...............................2

Base T-Slot Size (in.) ................................................... 5/8 ............................ 5/8 .............................. 5/8 ........................... 5/8

Motor ..................................................................................[all models] TEFC 2HP, 3PH, 230V only, 60Hz, 2-spee d

Overall Dime nsio ns Lx Wx H (in.)................... 32 x 24 x 71 ............. 32 x 24 x 71 ............... 32 x 24 x 71 .............32 x 24 x 71

Net Weight (lbs.) ......................................................... 660 ........................... 660 ............................. 700 .......................... 700

The above specifications were current at the time this manual was published, but because of o ur policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations.

GHD-20

...............

GHD-20PF

...................

GHD-20T

............

GHD-20PFT

Unpacking

Contents of the Shipping Co ntainer

1 Gear Head Drill Press 1 Lug Wrench 1 Can of White Touch-Up Paint 1 Drill Chuck Arbor (MT-3 x JT-6) 1 Drawbar 1 Drift Key 1 Crank 1 Handle 3 Downfeed Handles (GHD-20/20T only) 3 Knobs (two with GHD-20PF/20PFT) 1 3mm Hex Wrench 1 4mm Hex Wrench 1 5mm Hex Wrench 1 Main Shaft Cover 1 Owner's Manual 1 Warranty Card

1. Finish removing the contents of the shipping

container.

2. Compare the contents of the shipping container with

the list above. Report any shortages or damage to your JET distributor.

3. Clean all rust protected surfaces with kerosene or a

light solvent. Do not use lacquer thinner, paint thinner or gasoline. These will damage plastic components and painted surfaces.

Assembly

1. Slide crank (A, Figure 1) onto the table raising

assembly shaft.

2. Tighten the set screw (B, Fig ure 1) to hold the cra nk

in place

3. Install the handle (C, Figure 1) onto the crank

4. For the GHD-20/20T, install three handles with knobs

(A, Figure 2) into the downfeed hub. For the GHD20PF/20PFT, screw two knobs onto the handles of the power downfeed assembly.

5. Install chuck guard by sliding the support bar up into

the base mounted to the head. Tighten screws.

Figure 1

Figure 2

Adjusting the Head Height

To facilitat e shipp ing, the Dr ill Press is packed with t he head adjusted down on the column. T he head assembly should be moved to the top of the column before drilling operation starts.

The head assembly is very heavy.

Use caution when adjusting the head and make sure it is supported by the table or locked in place. Failure to comply may cause damage to property and/or personal injury!

1. Unlock the table by loosening the handle (A, Figure

2. Lower the table until there is room to place a block of

wood between the table and the head assembly (Figure 4).

3. Loosen two nuts (A, Figure 5) on the head assembly.

4. Raise the head by raising the table. T he head is at

the correct height when the top of the head is just below the column cap (B, Figure 5).

5. Tighten the two nuts (A, Figure 5) on the head

assembly firmly.

6. To lower the head, reverse the steps above. Do not

loosen the head assembly bolts without supporting the head. This may cause the head to slip on the column and may cause damage to the machine or personal injury.

Figure 3

Figure 4

Adjusting the Rack Assembly

After the table has been adjusted, the rack assembly will need to be raised.

The table must be locked when

raising the rack. Failure to lock t he table may cause the assembly to drop on the column, causing damage to the machine.

1. Make sure both head assembly nuts (A, Figure 5)

are tight.

2. Loosen the hex socket cap screw (C, Figure 6) on

the upper rack ring.

3. Loosen two set screws on the bottom rack ring (D,

Figure 7).

4. Raise the rack assembly by turning the table raising

handle clockwise.

5. T he rack a ssembly is at it s full he ight whe n the top

rack ring is just below the head assembly (as illustrated in Figure 6).

6. Tighten the hex socket cap screw on the top rack

ring and two set screws on the lower rack ring.

Figure 5

Figure 6

Controls

Low/Off/High Switch (A, Figure 8) – located top left side

of the head assembly. Switch between low and high speed range. In the stop position, the spindle is stopped, but the machine still has power.

Fine Feed Handwheel (B, Figure 8) – located on the front lower right of the head a ssembly. Turn clockwise to lower the quill. Turn counter-clockwise to raise the quill.

Quill Lock (C, Figure 8) – located on the front lower right of the head assembly. Turn clockwise and tighten to lock the quill. Turn counterclockwise and loosen to unlock the quill.

Speed Selectors (D, Figure 8) – located on the top front of the head assembly. Used with low/off/high switch and the speed chart on the front of the head assembly to set the drill to a specific speed. Cauti on: C hange speeds

only when the machine is stopped.

Figure 7

Depth Stop (GHD-20/20T) (E , Figure 8) - located on t he front bottom of the head assembly. When set, the quill will only advance to a certain depth.

Depth Stop (GHD-20PF/20PFT) (A, Figure 9) - located on the downfeed assembly on the right side of the head assembly. When set, the quill will advance automatically or manually to a certain depth.

Power Downfeed Speed Selector (GHD-20PF/ 20PFT) (B, Figure 9) - located on the right side of the head assembly. Set to advance the quill at desired speed. Engage the power downfeed by pulling the handle assembly away from the head. Disengage the power downfeed by pushing the handle assembly toward the head. Tighten Lock Screw (C, Figure 9) to lock out the power downfeed and to keep the drill in manual feed only.

Figure 8

Figure 9

Control Panel for GHD-20T/20PFT

Low/Off/High Switch (A, Figure 9A) Switch between low

and high speed range. In the stop position, the spindle is stopped, but the machine still has power.

Drilling Tapping Selector (B, Figure 9A) For drilling, press the start switch (F, Figure 9A) to run the machine. Caution: The internal depth stop (GHD-20PFT) is used only with the tapping function. Raise t he adjusting knob (B, Figure 11) to t he top of the depth stop screw so as not to interfere with power dow nfeed or manual feedi ng operations. For tapping, turn switch (B, Figure 9A) to tapping position, press down the handle. The quill functions when upper limit switch is released. It then reverses automatically after hitting lower limit switch and will not stop until it hits the upper limit switch.

Emergency Switch (C, Figure 9A) Press this switch to stop all operations.

Power Light (D, Figure 9A) Indicates power is on.

Reverse Switch (E, Figure 9A) If tapping is interr upted

press the reverse switch to reverse the tap from workpiece. The button must be held down for continuous reversing.

Start Switch (F, Figure 9A) Activates the motor in the drill or tap mode.

Electrical Connections

Electrical connections must be

made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded to help prevent electrical shock and possible fatal injury. All adjustments or repair s must be done with the drill disconnected from the power source.

The motor is rated at 2 H P, 3 PH, 230V only. Make sure the power available matches the power requirement of the drill. The drill must be properly grounded.

When the drill is connected properly, the spindle turns clockwise in a conventional drilling rotation. If the spindle does not turn clockwise, disconnect the drill from the power supply and reverse two of the three power leads.

Figure 9A

Adjustments

Installing a Drill Chuck (not included)

1. Disconnect the machine from the power source.

2. Clean the arbor and the inside of the chuck. The

tapers must be clean and dry.

3. Push the chuck onto the arbor.

4. Retract the chuck jaws completely, and push the

arbor into the spindle.

5. Use a rubber mallet, or steel face hammer against a

block of wood, to sharply tap the bottom of the chuck two or three times to seat it. (Note: Never use a steel face hammer directly against the chuck.)

Removing the Arbor

1. Unplug the machine from the power source.

2. Make sure the drill is in gear.

3. Remove the main shaft cover (A, Figure 11).

4. Use an adjustable wrench or box wrench to loosen

the draw bar (A, Figure 10).

5. Unscrew the draw bar approximately two revolut ions.

If the arbor is not loose, gently tap on top of the draw bar to loosen the arbor.

6. Continue to unscrew the draw bar wit h one hand on

the chuck and arbor so that it doesn’t drop onto the table.

Adjusting the Depth Stop for Drilling (GHD-20)

To drill multiple holes at the same preset depth, use the depth stop:

1. Turn the adjusting knob (B, Figure 11) until the

correct depth is indicated o n the sca le on t he front of the drill head.

2. Dril l several te st holes t o m a k e sure the de pt h st o p i s

set correctly.

Adjusting Depth Stop for Drilling and Tapping (GHD-20T)

1. Follow steps for GHD-20 drilling.

2. When the tapping switch is on, the limit switches are

active and will reverse rotation at t he bottom of the stroke and stop rotation at the top.

3. When the tapping switch is off, the limit switches are

inactive and do not effect spindle rotation.

Figure 10

Figure 11

Adjusting the Depth Stop for Drilling (GHD-20PF)

1. Loosen the depth stop lock handle (A, Figure 12).

2. Manually advance the quill to the desired depth w ith

one hand.

3. With the other hand, turn the depth stop scale (B,

Figure 12) counter-clockwise to zero.

4. Tighten the depth stop lock handle (A, Figure 12).

The depth stop will now stop the drill at the predetermined setting.

Adjusting the Depth Stop for Drilling (GHD-20PFT)

1. Turn the adjusting knob (B, Figure 11) until full travel

is possible. Do not use this scale as a reference when drilling. This depth stop is for tapping only and should not interfere with drilling operations.

2. Follow steps for GHD-20PF drilling.

Figure 12

Adjusting the Depth Stop for Tapping (GHD-20PFT)

1. Loosen the depth stop lock handle (A, Figure 12) so

that it does not interfere with the internal depth stop located on the front of the drill head.

2. Adjust the front depth stop for the proper depth.

3. Manually advance the quill relea sing the upper limit

switch for tapping. This will start the motor. The quill will reverse directions upon triggering the lower limit switch.

4. Do not powerfeed and tap at the same time.

Changing Spindle Speeds

To change spindle speeds:

1. Stop the drill by turning the low/stop/high switch to

stop.

2. Adjust the levers (A, Figure 13) to t he desired speed

as indicated by the speed chart. Tur ning the spindle by hand will help the gear teeth mesh.

Figure 13

Return Spring Adj ustment

The return spring is adjusted at the factory and should not need further adjustment. If adj ustment ever becomes necessary:

1. Unplug the machine from the power source.

2. Loosen lock knob (A, Figure 14) while holding the

quill spring cover. Do not allow the cover to turn in your hand or the sp ring will unwind.

3. Pull out the cover (B, Figure 14) and rotate until the

pin (C, Figure 14) on t he return spri ng plate e ngages the next notch in the coil spring cover. Turn the cover clockwise to decrease tension and counter-clockwise to increase tension.

4. Tighten the lock knob (A , Figure 14). Do not over-

tighten. Nuts should not contact the housing when tight.

Tilting the Head

To tilt the head:

1. Turn nut (A, Figure 15) clockwise to pull out the

alignment pin (B, Figure 15).

2. Loosen hex nuts (C, Figure 15).

Figure 14

3. Tilt the head to the desired angle.

4. Tighten two hex nuts (C, Figure 15).

5. The alignment pin only works at 0° and must be

reinserted when the head is returned to 0°.

Lubrication

Refer to Figure 16.

1. Headstock. Fill with Mobil DTE® Oil Heav y M e dium .

Check level daily and change yearly.

2. Powerfeed. Use Mobilith AW2 every three months.

3. Spline Drive. Use Mobilith AW2 every three months.

4. Quill Pinion Gear. Use Mobilith AW2 Every three

months.

5. Quill Column Surface. Use Mobil DTE® Oil Hea vy

Medium every three months.

6. Table Pinion Gear. Use Mobilith AW2 every three

months.

7. Quill Return Spring. Mobil DTE® Oil Heavy

Medium every month. Do not remove cover.

Figure 15

Figure 16

Changing the Gear Box Lubricant

1. Disconnect the machine from the power source.

2. Loosen nuts (A, Figure 17).

3. Tilt t he head to access t he drain pl ug. The dra in plug

is found in the head cavity behind the spindle.

4. Loosen the drain plug but do not remove.

5. Return the head to upright position.

6. Place a container on the table to catch the draining

lubricant.

7. Remove the filler plug (A, Figure 18).

8. Remove the drain plug.

9. Replace the drain plug after the lubricant has

finished draining.

10. Pour one (1) gallon of new lubricant (SHC-634 Oil

Heavy Medium) through the filler hole. Caution:

Use of any other type of lubricant other t han that specified may cause damage to the drill press.

11. Replace the filler plug.

Figure 17

Figure 18

Troubleshooting

Trouble Probable Cause Remedy

Excessive vibration. Motor out of balance. Balance motor or replace.

Improper quill adjustment. Adjust quill.

Noisy Operation.

Motor Stalls.

Drill or tool heats up or burns work.

Drill le a ds off.

Dry spindle.

Noisy motor

Overfeeding. Reduce feed rate. Dull drill bit. Sharpen drill bit.

Motor not running up to speed.

Excessive speed. Reduce speed. Dull tool. Sharpen tool or replace. Feed rate too slow. Increase feed enough to clear chips. Rotation of drill incorrect. Reverse motor rotation. Failure to use cutting oil or coolant (on

steel). No drill spot. Center punch or center drill workpiece. Cutting lips on drill off center. Re-grind drill. Quill lo ose in head . Tighte n qu i ll.

Lubricate spindle. See the Lubrication section.

Check motor bearings or for a loose motor fa n.

Replace or repair motor. Check fuses in all three legs on three phase motors and replace, if necessary.

Use cutting oil or coolant (on steel).

Bearing play. Reseat or replace bearings. Bent drill. Replace drill.

Excessive drill runou t or wobble.

Work or fixture comes loose or spins.

Bearing play. Reseat or replace bearings. Drill not seated properly in the chuck. Loosen, reset, and tighten chuck. Failure to clamp work piece or work

holding device to table.

Clamp work piece or work holding device to the table surface.

Replacement Parts

Replacement parts are listed on the followi ng pages. To order parts or reach our service departm ent, call 1800-274-6848, Monday through Friday (see our website for business hours, www.jettools.com). Having the Model Number and Serial Number of your machine available when you call will allow us to serve you quickly and accurately.

GHD-20PF/20PFT Head Assembly

Parts List – GHD-20PF/20PFT Head Assembly

Index No. Part No. Description Size Qt y

40 .............. GHD20PF-40 ............ Screw ....................................................................... 3/16” x 3/8” .................... 1

42 .............. 61105 ........................ Spring Base ............................................................. ...................................... 1

43 .............. GHD20PF-43 ............ Spring Pin ................................................................ 3 x 12 mm ..................... 2

44 .............. GHD20PF-44 ............ Screw ....................................................................... 3/16” x 3/4” .................... 3

45 .............. 61104 ........................ Spring ...................................................................... ...................................... 1

46 .............. 61103 ........................ Spring Cover ............................................................ ...................................... 1

47 .............. TS-0680021 .............. Washer .................................................................... 1/4" ................................ 1

48 .............. TS-0720071 .............. Lock Washer ............................................................ 1/4" ................................ 1

49 .............. 6185 .......................... Lock Knob ................................................................ ...................................... 1

50-A ........... GHD20-50-A ............. Chuck Guard Assembly (#50-1 thru 50-9) ............... ...................................... 1

50-1 ........... JMD18-125-1 ............ Chuck Guard............................................................ ...................................... 1

50-2 ........... JMD18-125-2 ............ Chuck Guard Supporting Rod.................................. ...................................... 1

50-3 ........... TS-2361051 .............. Spring Washer ......................................................... M5 ................................. 4

50-4 ........... TS-1502021 .............. Hex Socket Head Screw .......................................... M5 x 10 ......................... 2

50-5 ........... GHD20-50-5 .............. Chuck Guard Bracket .............................................. ...................................... 1

50-6 ........... JMD18-125-5 ............ Rotary Supporting Base........................................... ...................................... 1

50-7 ........... JMD18-125-6 ............ Hex Socket Cap Screw ............................................ M5x15L ......................... 2

50-8 ........... TS-1551041 .............. Spring Washer ......................................................... M6 ................................. 2

50-9 ........... 6286490 .................... Hex Socket Cap Screw ............................................ M6x15L ......................... 2

52 .............. TS-0071141 .............. Hex Cap Bolt............................................................ 5/8” x 5-1/2”................... 2

53 .............. GHD20-53 ................. Oil Plug .................................................................... 1/4”PT ........................... 1

70 .............. 2421003 .................... Handle Rod .............................................................. ...................................... 1

76 .............. 2401076 .................... Scale ........................................................................ ...................................... 1

76-1 ........... 2450060 .................... Pointer ..................................................................... ...................................... 3

78 .............. 6112 .......................... Rubber Gasket......................................................... ...................................... 1

79 .............. 2412001 .................... Casting..................................................................... .. .................................... 1

82 .............. 6114 .......................... Lock Nut................................................................... ...................................... 1

83 .............. GHD20PF-83 ............ Star Washer ............................................................. ...................................... 1

84 .............. BB-30206 .................. Taper Roller Bearing................................................ ...................................... 1

85 .............. 6116 .......................... Rack Sleeve............................................................. MT3 ............................... 1

86 .............. 6117 .......................... Spindle Shaft ........................................................... ...................................... 1

87 .............. BB-30207 .................. Taper Roller Bearing................................................ ...................................... 1

88 .............. 6119 .......................... Bearing Cap ............................................................. ...................................... 1

89 .............. 6127 .......................... Screw Key................................................................ ...................................... 1

90 .............. TS-0561031 .............. Hex Nut .................................................................... 3/8” ................................ 1

91 .............. 2401066 .................... Gear Lever Bracket.................................................. ...................................... 2

92 .............. 2401067 .................... Gear Lever (Left) ..................................................... ...................................... 1

93 .............. 2401068 .................... Gear Lever (Right) ................................................... ...................................... 1

94 .............. GHD20PF-94 ............ Screw ....................................................................... 1/4” x 1/2" ...................... 1

95 .............. 2401070 .................... Lever Shaft (Right)................................................... ...................................... 1

96 .............. 2401071 .................... Lever Shaft (Left) ..................................................... ...................................... 1

97 .............. GHD20PF-97 ............ C-Ring...................................................................... ...................................... 2

98 .............. GHD20PF-98 ............ Oil Sight Glass ......................................................... ...................................... 1

99 .............. GHD20PF-99 ............ Screw ....................................................................... 3/16” x 3/8” .................... 8

100 ............ GHD20PF-100 .......... Oil Seal .................................................................... G12 ............................... 2

102 ............ 2401075 .................... Speed Lever ............................................................ ...................................... 2

106 ............ GHD20PF-106 .......... Oil Plug .................................................................... ...................................... 1

107 ............ TS-0209081 .............. Hex Socket Cap Screw ............................................ 3/8” x 3/4" ...................... 6

108 ............ GHD20PF-108 .......... Miter Pin................................................................... ......... ............................. 2

109 ............ TS-0267021 .............. Set Screw ................................................................ 1/4" x 1/4"...................... 4

110 ............ GHD20-86 ................. Motor........................................................................ 2HP 3PH 230V.............. 1

111 ............ GHD20PF-111 .......... Key........................................................................... 6 x 5 x 30mm ................ 1

112 ............ TS-0209051 .............. Hex Socket Cap Screw ............................................ 3/8” x 3/4” ...................... 6

113 ............ GHD20-89 ................. Brass Fitting ............................................................. ...................................... 1

114 ............ TS-0561071 .............. Hex Nut .................................................................... 5/8” ................................ 3

116 ............ TS-0071041 .............. Hex Cap Bolt............................................................ 5/8” x 2-1/4”................... 3

119 ............ 6126-1 ....................... Collar (thread) .......................................................... ...................................... 1

120 ............ 6125-1 ....................... Collar ....................................................................... ...................................... 1

121 ............ 6125-2 ....................... Collar ....................................................................... ...................................... 1

122 ............ 61112 ........................ Cover Plate .............................................................. ...................................... 1

Index No. Part No. Description Size Qt y

123 ............ GHD20-123 ............... Screw ....................................................................... ...................................... 4

124 ............ GHD20-124 ............... Lamp Assembly ....................................................... ............. ......................... 1

125 ............ TS-2284352 .............. Pan Head Screw ...................................................... M4x35L ......................... 2

126 ............ GHD20-126 ............... Lamp Base............................................................... ...................................... 1

127 ............ TS-1503031 .............. Hex Socket Cap Screw ............................................ M6x12L ......................... 2

150 ............ TS-0561071 .............. Hex Nut .................................................................... 5/8” ................................ 2

151 ............ TS-0680081 .............. Washer .................................................................... 5/8” ................................ 2

201 ............ 2450001 .................... Head Body Cover .................................................... ...................................... 1

202 ............ 2450002 .................... Head Body Castin g .................................................. ...................................... 1

218 ............ 2450008 .................... Worm Gear .............................................................. ...................................... 1

219 ............ TS-1523011 .............. Set Screw ................................................................ M6 x 6 ........................... 4

220 ............ GHD20PF-220 .......... C-Ring...................................................................... ...................................... 4

227 ............ 2450014 .................... Cover ....................................................................... ...................................... 1

233 ............ GHD20PF-233 .......... Screw ....................................................................... M4 x 25 ......................... 1

235 ............ 2450020 .................... Release Block .......................................................... ...................................... 1

236 ............ 2450021 .................... Small Pinion Shaft ................................................... ...................................... 1

237 ............ 2450022 .................... Key........................................................................... ...................................... 2

238 ............ 2450023 .................... Worm Gear .............................................................. ...................................... 1

239 ............ 2450024 .................... Clutch Key Base ...................................................... ...................................... 1

241 ............ 2450026 .................... Clutch Key ............................................................... ...................................... 2

242 ............ 2450027 .................... Spring Pin ................................................................ ...................................... 2

243 ............ 2450028 .................... Spring ...................................................................... ...................................... 2

244 ............ GHD20PF-244 .......... C-Ring...................................................................... ...................................... 1

246 ............ 2450030 .................... Bushing Pin.............................................................. ...................................... 1

247 ............ 2450031 .................... Bushing Stop ........................................................... ...................................... 1

248 ............ 2450032 .................... Scale Base............................................................... ...................................... 1

249 ............ GHD20PF-249 .......... Rivet......................................................................... ...................................... 8

250 ............ 2450033 .................... Scale Base Set Screw ............................................. ...................................... 1

254 ............ 2450037 .................... Handle Body ............................................................ ...................................... 1

255 ............ 2450038 .................... Handle Rod .............................................................. ...................................... 2

256 ............ GHD20PF-256 .......... Knob ........................................................................ ...................................... 2

257 ............ 2450039 .................... Handle Rod Pin........................................................ ...................................... 2

258 ............ 2450040 .................... Washer .................................................................... ...................................... 1

259 ............ TS-1504021 .............. Hex Socket Cap Screw ............................................ M8 x 12 ......................... 1

265 ............ GHD20PF-265 .......... Key........................................................................... 5 x 5 x 32mm ................ 1

266 ............ 2450045 .................... Cover ....................................................................... ...................................... 1

268 ............ TS-1502031 .............. Hex Socket Cap Screw ............................................ M5 x 12 ......................... 2

269 ............ GHD20PF-269 .......... Key........................................................................... 4 x 4 x 10mm ................ 1

270 ............ 24500470 .................. Han dwheel ............................................................... ...................................... 1

271 ............ GHD20PF-271 .......... Washer .................................................................... ...................................... 1

272 ............ TS-1523031 .............. Hex Socket Cap Screw ............................................ M6 x 12 ......................... 1

279 ............ TS-0561021 .............. Hex Nut .................................................................... 5/16” .............................. 1

282 ............ GHD20PF-282 .......... Plug.......................................................................... 7/8” ................................ 1

283 ............ GHD20PF-283 .......... Oil Seal .................................................................... ...................................... 1

287 ............ GHD20PF-287 .......... Spring Pin ................................................................ ...................................... 2

291 ............ 2450051 .................... Pin............................................................................ ...................................... 1

313 ............ 2450063 .................... Grip .......................................................................... ...................................... 1

315 ............ GHD20PF-315 .......... Washer .................................................................... 3/16” .............................. 2

330 ............ 2401085 .................... Dust Plate ................................................................ .... .................................. 1

332 ............ GHD20PF-332 .......... Pin............................................................................ ...................................... 1

333 ............ 2450069 .................... Dust Plate ................................................................ .... .................................. 1

339 ............ GHD20-339 ............... High-Low Switch (for GHD20PF only) ..................... ...................................... 1

340 ............ GHD20-340 ............... Screw (GHD-20PF only) .......................................... ...................................... 1

341 ............ GHD20-341 ............... Motor Cord ............................................................... ...................................... 1

342 ............ GHD20-342 ............... Power Cord .............................................................. ...................................... 1

345 ............ GHD20PF-345 .......... Nut ........................................................................... ...................................... 1

346 ............ GHD20PF-346 .......... Manual Feed Knob .................................................. ...................................... 1

347 ............ GHD20-347 ............... Name Plate .............................................................. ...................................... 1

347-1 ......... GHD20PF-347-1 ....... Name Plate (for GHD20PFT onl y - not shown) ....... ...................................... 1

348 ............ 2450086A .................. Pinion Shaft ............................................................. ...................................... 1

349 ............ 2450097 .................... Spring Pin ................................................................ ...................................... 2

350 ............ 2450096 .................... Clutch Screw............................................................ ...................................... 1

Index No. Part No. Description Size Qt y

351 ............ 2450095 .................... Clutch Nut ................................................................ ...................................... 1

352 ............ 2450068 .................... Gear Box.................................................................. ...................................... 1

353 ............ 2450081A .................. Gear Shaft ............................................................... ...................................... 1

354 ............ 2450082A .................. Speed Change Lever ............................................... ...................................... 1

355 ............ 2450083A .................. Stop ......................................................................... ...................................... 1

356 ............ 2450084A .................. Spring Leaf .............................................................. ...................................... 1

357 ............ GHD20PF-357 .......... Pin............................................................................ ...................................... 2

358 ............ 2450089A .................. Bushing Bracket....................................................... ...................................... 1

359 ............ 2450072A .................. Bearing Bushing ...................................................... ...................................... 1

360 ............ 2450071A .................. Bearing Bushing ...................................................... ...................................... 1

361 ............ 2450070A .................. Bearing Bushing ...................................................... ...................................... 1

362 ............ 2450074A .................. Washer .................................................................... ...................................... 4

363 ............ 2450073A .................. Shaft ........................................................................ ...................................... 1

364 ............ 2450078A .................. Transmission Worm ................................................. ...................................... 1

365 ............ 2450075A .................. Bearing Bushing ...................................................... ...................................... 1

366 ............ 2450076A .................. Bearing Bushing ...................................................... ...................................... 1

367 ............ 2450077A .................. Bearing Bushing ...................................................... ...................................... 1

368 ............ 2450085A .................. Spacer Ring ............................................................. ...................................... 1

369 ............ 2450079 .................... Speed Lever ............................................................ ...................................... 1

370 ............ GHD20PF-370 .......... Speed Scale ............................................................ ...................................... 1

371 ............ 290089 ...................... Spring ...................................................................... ...................................... 1

372 ............ GHD20PF-372 .......... Steel Ball.................................................................. ...................................... 1

373 ............ 2450087A .................. Clutch Bushing......................................................... ...................................... 1

374 ............ GHD20-374 ............... Flat Washer ............................................................. 1/2” x 7/8” x 2” ............... 1

375 ............ 2450100 .................... Washer .................................................................... ...................................... 1

376 ............ GHD20PF-376 .......... E-Retainer Ring ....................................................... E5............. ..................... 2

377 ............ GHD20PF-377 .......... Hex Socket Head Screw .......................................... 5/16” x 1-1/4”L............... 4

378 ............ CA6003ZZ ................. Ball Bearing ............................................................. ...................................... 4

379 ............ GHD20PF-379 .......... Key........................................................................... 5 x 5 x 28L mm ............. 1

380 ............ GHD20PF-380 .......... C-Ring...................................................................... ...................................... 1

381 ............ 2450088A .................. Graduated Bottom Ring ........................................... ...................................... 1

GHD-20/20T Head Assembly

Parts List – GHD-20/20T Head Assembly

Index No. Part No. Description Size Qt y

11 .............. 2401011 .................... Head Casting ........................................................... ...................................... 1

12 .............. 6112 .......................... Rubber Gasket......................................................... ...................................... 1

13 .............. 6513 .......................... Feed Base ............................................................... ...................................... 1

14 .............. 6114 .......................... Lock Nut................................................................... ...................................... 2

15 .............. BB-30206 .................. Taper Roller Bearing................................................ ...................................... 1

16 .............. 6116 .......................... Rack Sleeve............................................................. MT3 ............................... 1

17 .............. 6117 .......................... Spindle Shaft ........................................................... MT3 ............................... 1

18 .............. BB-30207 .................. Taper Roller Bearing................................................ ...................................... 1

19 .............. 6119 .......................... Bearing Cap ............................................................. ...................................... 1

24 .............. 2421003 .................... Handle Rod .............................................................. ...................................... 1

27 .............. 6127 .......................... Screw Key................................................................ ...................................... 1

35 .............. 6135 .......................... Bearing Spacer ........................................................ ...................................... 1

39 .............. 6139 .......................... Handle Rod .............................................................. ...................................... 3

40 .............. 290086 ...................... Knob ........................................................................ ...................................... 3

44 .............. 6144 .......................... Micro Adjusting Indi cator ......................................... ...................................... 1

45 .............. 6145 .......................... Worm Cover............................................................. ...................................... 1

46 .............. BB-6202Z .................. Ball Bearing ............................................................. ...................................... 2

47 .............. 6147 .......................... Worm Shaft .............................................................. ...................................... 1