Jet Elite E-1236VS Operating Instructions And Parts Manual
Operating Instructions and Parts Manual
1236 Lathe
Model: E-1236VS
®
JET
427 New Sanford Road
LaVergne, Tennessee 37086
www.jettools.com
Ph.: 855-336-4032
M-E-1236VS
REV E 06/2017
Copyright © 2017 JET
1.0 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 1-855-336-4032, 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, jettools.com.
WHO IS COVERED?
This warranty covers only the initial purchaser of the product from the date of delivery.
WHAT IS COVERED?
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.
HOW TO GET TECHNICAL SUPPORT
Please contact Technical Service by calling 1-855-336-4032. Please note that you will be asked to provide proof of initial
purchase when 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 1-855-336-4032 or use the Service Center Locator on the JET website.
2
1236 Lathe
MORE INFORMATION
JET® is constantly adding new products. For complete, up-to-date product information, check with your local distributor or
visit the JET website, jettools.com.
HOW STATE 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® branded
products are not sold in Canada by JPW Industries, Inc.
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.
E-1236VS
3
2.0 TABLE OF CONTENTS
1.0 WARRANTY AND SERVICE ..........................................................................................................................................2
2.0 TABLE OF CONTENTS ..................................................................................................................................................4
3.0 SAFETY PRECAUTIONS ...............................................................................................................................................5
4.0 INTRODUCTION ............................................................................................................................................................7
5.0 SPECIFICATION AND ACCESSORIES .........................................................................................................................7
5.1 GENERAL LAYOUT OF LATHE .................................................................................................................................7
5.2 DIMENSIONS ............................................................................................................................................................8
5.3 FOUNDATION PLAN .................................................................................................................................................8
5.4 SPECIFICATIONS .....................................................................................................................................................9
5.5 STANDARD ACCESSORIES ...................................................................................................................................10
5.6 OPTIONAL ACCESSORIES ....................................................................................................................................10
6.0 INSTALLATION ............................................................................................................................................................10
6.1 LEVELING THE LATHE ...........................................................................................................................................10
6.2 COMPLETING INSTALLATION ...............................................................................................................................11
6.3 CHUCK PREPARATION .......................................................................................................................................... 11
6.4 BREAK-IN PERIOD .................................................................................................................................................12
7.0 MAINTENANCE/LUBRICATION ..................................................................................................................................12
7.1 BALL OILER LOCATIONS .......................................................................................................................................13
7.2 COOLANT PREPARATION ......................................................................................................................................14
8.0 ELECTRICAL CONNECTIONS ....................................................................................................................................15
9.0 BASIC CONTROLS ......................................................................................................................................................15
10.0 OPERATION ...............................................................................................................................................................17
10.1 TOOL SETUP .........................................................................................................................................................18
10.2 SPINDLE SPEED ...................................................................................................................................................18
10.3 FEED AND THREAD SELECTION ........................................................................................................................18
10.4 THREAD CUTTING ...............................................................................................................................................18
11.0 ADJUSTMENTS .........................................................................................................................................................19
11.1 CHUCK JAW REVERSAL ......................................................................................................................................19
11.2 GIB ADJUSTMENTS ..............................................................................................................................................19
11.3 TAILSTOCK ADJUSTMENTS ................................................................................................................................20
11.4 GAP SECTION .......................................................................................................................................................20
11.5 ALIGNING TAILSTOCK TO HEADSTOCK .............................................................................................................20
11.6 CROSS SLIDE NUT ADJUSTMENT ......................................................................................................................21
11.7 SHEAR PIN REPLACEMENT ................................................................................................................................21
11.8 STEADY REST ADJUSTMENT ..............................................................................................................................21
11.9 FOLLOW REST ADJUSTMENT .............................................................................................................................21
12.0 RECOMMENDED CUTTING SPEED OF LATHE ......................................................................................................22
13.0 REPLACEMENT PARTS ............................................................................................................................................22
14.0 WIRING DIAGRAMS ..................................................................................................................................................68
15.0 SCHEDULE OF ELECTRICAL EQUIPMENT.............................................................................................................70
4
1236 Lathe
3.0 SAFETY PRECAUTIONS
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 lathe is designed and intended for use by properly trained and experienced personnel only. If you are not familiar
with the proper and safe operation of a lathe, do not use until proper training and knowledge have been obtained.
5. Do not use this lathe for other than its intended use. If used for other purposes, JET
warranty and holds itself harmless from any injury that may result from that use.
6. Always wear approved safety glasses/face shields while using this lathe. Everyday eyeglasses only have impact
resistant lenses; they are not safety glasses.
7. Before operating this lathe, remove tie, rings, watches and other jewelry, 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.
8. Wear ear protectors (plugs or muffs) during extended periods of operation.
9.
CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals known to the State of California to cause cancer, or
birth defects or other reproductive harm.
10. This product, when used for welding, cutting, or working with metal, produces fumes, gases, or dusts which contain chemicals
known to the State of California to cause birth defects and, in some cases, cancer. (California Health and Safety Code Section
25249.5 et seq.)
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. Make certain the machine is properly grounded.
14. Make all machine adjustments or maintenance with the machine unplugged from the power source.
15. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adjusting wrenches are
removed from the machine before turning it on.
16. 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.
17. Check damaged parts. Before further use of the machine, a guard or other part that is damaged should be carefully
checked to determine that it will operate properly and perform its intended function. Check for alignment of moving
parts, binding of moving parts, breakage of parts, mounting and any other conditions that may affect its operation. A
guard or other part that is damaged should be properly repaired or replaced.
18. Do not use power tools in damp/wet locations or other dangerous environments. Do not expose them to rain. Keep
work area well lighted. Provide for adequate space surrounding work area and non-glare, overhead lighting.
19. Keep the floor around the machine clean and free of scrap material, oil and grease.
®
, disclaims any real or implied
20. Keep visitors a safe distance from the work area. Keep children away.
21. Make your workshop child proof with padlocks, master switches or by removing starter keys.
22. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are careless acts
that can result in serious injury.
23. Maintain a balanced stance at all times so that you do not fall or lean against moving parts. Do not overreach or use
excessive force to perform any machine operation. Never force the cutting action.
E-1236VS
5
24. Do not operate the lathe in flammable or explosive environments. Do not use in a damp environment or expose to
rain.
25. 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.
26. Use recommended accessories; improper accessories may be hazardous.
27. Maintain tools with care. Keep cutting tools sharp and clean for the best and safest performance. Follow instructions
for lubricating and changing accessories.
28. Do not attempt to adjust or remove tools during operation. Disconnect tools before servicing; when changing
accessories, such as blades, bits, cutters, and the like.
29. Never stop a rotating chuck or workpiece with your hands.
30. Choose a low spindle speed when working unbalanced workpieces, and for threading and tapping operations.
31. Do not exceed the maximum speed of the workholding device.
32. Do not exceed the clamping capacity of the chuck.
33. Secure Work. For safety and use of both hands, use clamps or a vise to hold work when practical.
34. Workpieces longer than 3 times the chucking diameter must be supported by the tailstock or a steady rest.
35. Avoid small chuck diameters with large turning diameters.
36. Avoid short chucking lengths and small chucking contact.
37. Turn off the machine and disconnect from power before cleaning. Use a brush to remove shavings or debris — do not
use your hands.
38. Do not stand on the machine. Serious injury could occur if the machine tips over.
39. Never leave the machine running unattended. Turn the power off and do not leave the machine until moving parts
come to a complete stop.
40. Remove loose items and unnecessary work pieces from the area before starting the machine.
41. Direction of feed — feed work into a blade or cutter against the direction of rotation of the blade or cutter only.
42. Installation work and electrical wiring must be done by qualified electrician in accordance with all applicable codes
and standards.
43. Tighten all locks before operating.
44. Rotate workpiece by hand before applying power.
45. Rough out workpiece before installing on faceplate.
46. Do not mount split workpiece or one containing knot.
47. Use lowest speed when starting new workpiece.
6
1236 Lathe
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
This means that if precautions are not heeded, it
may result in serious injury or possibly even death.
!
damage.
4.0 INTRODUCTION
This manual is provided by JET® covering the safe operation and maintenance procedures for a JET Model E-1236VS.
This manual contains instructions on installation, safety precautions, general operating procedures, maintenance
instructions and parts breakdown. Your machine has been designed and constructed to provide years of trouble-free
operation if used in accordance with the instructions as set forth in this document.
If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our web
site: www.jettools.com. Retain this manual for future reference. If the machine transfers ownership, the manual should
accompany it.
5.0 SPECIFICA TION AND ACCESSORIES
5.1 GENERAL LAYOUT OF LATHE
1. Headstock
20
19
15
5
14
13
2
1
18
3
17
4
16
76
8
2. Spindle
3. Saddle
4. Toolpost
5. Cross - slide
6. Compound - rest
9
(Top slide)
7. Splash Guard
10
8. Tailstock
9. Lead Screw
10. Feed Rod
11. Switch control rod
11
12. Bed
13. Stand
14. Spindle rotation lever
12
15. Apron
16. Footbrake
17. Cabinet (Tool box)
18. Head end stand
Fig. 1
19. Gearbox
20. End Cover
E-1236VS
7
5.2 DIMENSIONS
T.P.I
26
127
52
56
32 36 40 48
28
20 24
18916
14
10 12
8
52
127
STOP LATHE TO
26
CHANGE SPEED
8
9 10 12 14
75 6
4.5
2.5 3 3.5
2.2542
40
40
40
127
127
127
44
46
52
3 3 3
22
23
26
11
11.5
13
5.5
5.75
6.5
inch
26
127
52
0.00280.00250.0023 0.00190.0016
0.00570.00510.0046 0.00380.0032
0.01150.01020.00920.0076 0.0065
52
127
26
0.01150.01020.00920.0076 0.0065
0.02300.02040.0184 0.01530.0131
A
0.04600.04090.0368 0.03070.0263
B
C
mm
2652354030
127
120
50
0.8 0.90.9
0.750.875
0.5 0.6 0.8
PC
1.81.61.751.51.21.0
MM
2.0 2.4 3.0 3.5 3.2 3.6
6050605030
30
30304040
1.8751.125 1.25
1.0
2.02.4 2.5 3.0
3.752.25
2.0
4.0
4.85.0 6.0
2.5
4.04.5 5.0 7.5 8.0
9.610 12
Leadscrew 8 TPI
D
A
H
L
TOOGLE
RPM
45
3
1
2
E
B
C
Size/Type A B C D E
E-1236VS 36 in 64-1/2 in 70-1/4 in 45-1/4 in 41 in
19”
28.2”
Fig. 2
5.3 FOUNDATION PLAN
5/8” Hole
For motor removal
12”
23”
For endcover open
14.3”
7”
17.5”
11”
STAND
6”
3.4”
2”
MOTOR
M12x1.75 Bolt
11”
CENTER LINE
6”
2”
For electrical
box cover open
24”
SPLASH GUARD
TRAY OUTLONE
48.4”
64.6”
93.7”
13.3”
BEDWAY
14.2”
For pump removal
27.7”
PUMP
TANK
41.9”
20”
For Tailstock removal
2”
5”
11.6”
8
Fig. 3
1236 Lathe
5.4 SPECIFICATIONS
MODEL E-1236VS
Swing over Bed 306mm 12in
Swing over Cross Slide 186mm 7-5/16in
Height of Center 150mm 6in
Distance between Centers 915mm 36in
BED
Width of Bedways 190mm 7-1/2in
Swing over Gap 445mm 17-1/2in
Length of Gap 240mm 9-1/2in
Width in front of face plate 150mm 6in
SPINDLE
Spindle nose mounting D1-4 Camlock
Spindle bore 40mm 1-9/16in
Taper of spindle bore M.T. #5
Number of spindle speeds Variable speed change
Range of spindle speeds 40-2000 R.P.M.
TOOL SLIDE
Total travel of cross slide 170mm 6-3/4in
Total travel of top slide 90mm 3-1/2in
Max. size cutting tool 13mm 1/2in
TAIL STOCK
Total travel of tailstock barrel 100mm 4in
Taper in tailstock barrel M.T. #3
Diameter of barrel 40mm 1-9/16in
THREADS
Lead screw diameter & pitch Dia. 22mm Pitch 4mm, 7/8in 8T.P.I.
Inch threads 3-24 TPI (8Nos) for metric system
2-56 TPI (34Nos) for inch system
Metric pitches 0.5-10mm (21Nos) for metric system
0.5-12mm (33Nos) for inch system
FEEDS
Feed rod diameter Dia. 19mm 3/4in
Longitudinal feeds 0.0016-0.0460in/rev. (25) for inch system
Cross feeds 0.0005-0.0150in/rev. for inch system
MOTOR
Main spindle motor 2HP, 230V, 3 phase
Power input 1 phase or 3 phase
Coolant pump motor 1/8HP 0.1KW
Machine net weight 550kgs
Machine gross weight 670kgs
We reserve the right to modify and improve our products.
E-1236VS
9
5.5 STANDARD ACCESSORIES
• Electrical equipment & Motor 2 HP
• Set of change gears - 1 set
• Center sleeve M.T. No. 5x3 - 1 pc.
• Two centers M.T. No.3 - 1 set
• Threading dial indicator - 1 set
• Toolbox; set of spanners & Keys - 1 set
• 4-ways turret toolpost - 1 pc.
• Toolpost wrench - 1 set
• 6 inch (150mm) dia. backplates - 1 pc.
• 3 - jaw scroll chuck 6 inch (150mm)
• Face plate 10 inch (250mm)
• Steady rest
• Follow rest
• Coolant pump equipment
• Splash guard
6. The lathe’s center of weight is near the headstock.
Before lifting, move the tailstock and the carriage
(release carriage lock, see section 11.0) To the right
end of the bed and lock them.
7. With properly rated lifting equipment, slowly raise lathe
off shipping pallet. (See Figure 4). Do not lift lathe by
the spindle.
T.P.I
26
127
52
32 36 40 48 56
28
20 24
18916
14
10 12
8
52
127
STOP LATHE TO
26
CHANGE SPEED
H
L
8
9 10 12 14
75 6
4.5
2.5 3 3.5
2.2542
40
40
40
127
127
127
44
46
52
3 3 3
22
23
26
11
11.5
13
5.5
5.75
6.5
TOOGLE
RPM
inch
26
127
52
0.00280.00250.00230.0019 0.0016
0.00570.00510.00460.0038 0.0032
0.01150.01020.00920.0076 0.0065
52
127
26
0.01150.01020.00920.0076 0.0065
0.02300.02040.01840.0153 0.0131
A
0.04600.04090.03680.0307 0.0263
C
B
mm
2652354030
127
120
50
45
0.5 0.6 0.8
0.8 0.90.9
0.750.875
PC
1
3
1.81.61.751.51.21.0
MM
2
2.0 2.43.0 3.5 3.2 3.6
6050605030
30
30304040
1.8751.1251.25
1.0
2.02.4 2.5 3.0
3.752.25
2.0
4.0
4.85.0 6.0
2.5
4.04.5 5.0 7.58.0
9.610 12
Leadscrew 8 TPI
5.6 OPTIONAL ACCESSORIES
• 4 - jaw independent chuck 8 inch (200mm)
• Taper turning attachment
• Quick change toolpost
• Micro carriage stop
6.0 INSTALLATION
1. Finish removing all crate material from around lathe.
2. Unbolt lathe from shipping pallet.
3. Choose a location for the lathe that is dry and has
sufficient illumination (consult osha or ansi standards
for recommended lighting levels in workshop
environments).
4. Allow enough room to service the lathe on all four
sides, and to load and off-load work pieces. In addition,
if bar work is to be performed, allow enough space
for stock to extend out the headstock end. If used in
production operations, leave enough space for stacking
unfinished and finished parts.
5. The foundation must be solid to support the weight of
the machine and prevent vibration, preferably a solid
concrete floor.
Fig. 4
!
Confirm that all suspension equipment is properly
rated and in good condition for lifting lathe. Do not
allow anyone beneath or near load while lifting.
8. T he lathe can be placed upon the cast iron leveling
pads under each foot hole, and adjusted using the
adjusting bolts with hex nuts. Or, it may be secured
to the floor using bolts placed head-down in the
concrete, and using shims where needed to level
the machine. Refer to Figure 1 for mounting hole
dimensions.
6.1 LEVELING THE LATHE
It is imperative that the lathe be on a level plane; that is,
where headstock and tailstock center points remain aligned
throughout the tailstock travel, with the bed ways absent of
twist and thus parallel to the operational center line.
A lathe which is not properly leveled will be inaccurate,
producing tapered cuts. Also, the center point of the
tailstock will vary as it is positioned along the bed, thus
requiring constant readjustment of the set of the tailstock.
10
1236 Lathe
Fig. 5
The three-jaw scroll chuck is shipped pre-installed on the
lathe. It can be used for clamping cylindrical, triangular and
hexagonal stock, and has reversible jaws.
The four-jaw chuck has independently adjustable jaws, and
permits the holding of square and asymmetrical pieces.
It also enables accurate concentric set-up of cylindrical
pieces.
9. Use a machinist’s precision level on the bed ways both
front to back and side to side, as shown in Figure 5.
Take the reading in one direction every ten inches.
Make sure the ways are clean and free of any debris
before placing a level upon them.
10. Deviation over bed length (see Figure 5):
(a) Maximum 0.02/1000mm
(b) Maximum 0.04/1000mm
11. Tighten foot screw nuts evenly to avoid distortion.
12. Leveling should be inspected occasionally, and
especially if the accuracy of the lathe begins to
diminish.
6.2 COMPLETING INSTALLATION
13. Exposed metal surfaces have been coated with a
rust protectant. Remove this using a soft rag and mild
commercial solvent or kerosene. Do not use paint
thinner, gasoline, or lacquer thinner, as these will
damage painted surfaces. Cover all cleaned surfaces
with a light film of SAE-20W machine oil, such as Mobil
DTE Oil Heavy Medium.
!
Chucks are heavy; use an assistant to help
remove.
Before removing a chuck, place a flat piece of thick
plywood across the bedways under the chuck to prevent
damage to the bedways should the chuck fall from your
hands. Alternatively, many users make a wood chuck
cradle that sits atop the ways and accepts the specific
diameter of chuck, for easier installing and removal. Figure
6 shows an example.
14. Open the end gear cover. Clean all components of the
end gear assembly and coat all gears with a heavy,
non-slinging grease. Close the end gear cover.
Note: A limit switch prevents the lathe from
operating when the end gear cover is open.)
6.3 CHUCK PREPARATION
!
Read and understand all directions for chuck
preparation. Failure to comply may cause serious
injury and/or damage to the lathe.
E-1236VS
Fig. 6
To remove a chuck from the spindle:
1. Support the chuck while turning six camlocks 1/4-turn
counterclockwise, using the chuck wrench from the
tool box. See Figure 7.
2. Carefully remove the chuck from the spindle and place
on a firm work surface. If the spindle seems stuck, use
a mallet at various points on the back side to help free
it from the spindle.
3. Inspect the camlock studs. Make sure they have not
become cracked or broken during transit. Clean all
parts thoroughly with solvent. Also clean the spindle
and camlocks.
11
4. Cover all chuck jaws and the scroll inside the chuck
with #2 lithium tube grease. Cover the spindle,
camlocks, and chuck body with a light film of 20W oil.
5. Lift the chuck up to the spindle nose and press onto
the spindle. Tighten in place by turning the camlocks
1/4 turn clockwise. The index mark (A, Figure 7) on the
camlock should be between the two indicator arrows
(B) when tight, as shown in Figure 7.
• If the index mark (A) is not between the two
arrows, i.e. the cam turns beyond the indicator
arrows, then remove the chuck and turn the
camlock stud IN one full turn.
• If a camlock will not engage, remove the chuck
and turn the camlock stud OUT one full turn.
6. Make sure chuck is secure on the spindle with the
camlocks correctly engaged.
Cam Release
Line
B
7.0 MAINTENANCE/LUBRICATION
!
Lathe must be serviced at all lubrication points
and all reservoirs filled to operating level before
the lathe is put into service. Failure to comply may
cause serious damage to the lathe.
The lathe is shipped with oil in the reservoirs. Coolant is
not included.
Use clean lubricants and check levels often, including
before each working shift. To ensure proper lubrication,
oil levels should not be less than the center of the oil sight
glass. Try not to overfill, as this may cause leakage.
Unless specified otherwise, the lubrication points require a
non-detergent, ISO 68, SAE 20W oil. The recommended
brand for this lathe is Mobil DTE® Oil Heavy Medium.
1. Chuck – Lubricate the chuck daily with SAE 20W oil
through the ball oiler, shown in Figure 8.
B
A
Fig. 7
6.4 BREAK-IN PERIOD
Do not run the lathe above 560 RPM for the first six hours
of operation, to allow gears and bearings to adapt and run
smoothly.
12
Ball oiler
Fig. 8
2. Headstock – Oil must be up to indicator mark in oil
sight glass on right side of headstock (A, Figure 9).
Top off with SAE 20W oil. Fill by removing the rubber
mat and unscrewing the plug (B) on top of headstock.
1236 Lathe
To drain headstock, remove drain plug (C, Figure 10).
Drain oil completely and clean out all metal shavings,
then rinse the casting case with kerosene. Refill after
the first month of operation, then change the oil in the
headstock every two months.
B
E
A
D
Fig. 9
H
G
Fig. 11
5. Saddle – The anti-dust felt on both ends of the saddle
(Figure 12) should be cleaned weekly with kerosene. If
the felt becomes damaged, replace it.
Felt
C
F
Fig. 10
3. Gearbox – Oil must be up to indicator mark in oil sight
glass (D, Figure 9). Top off with SAE 20W oil. To add
oil to the gearbox, remove rubber mat and unscrew oil
plug (E, Figure 9). To drain, remove drain plug from the
pipe (F, Figure 10). Drain oil completely and refill after
the first three months of operation. Then change oil in
the gearbox every six months.
4. Apron – Oil must be between indicator marks in the
oil sight glass (G, Figure 11). Top off with SAE 20W
oil. Unscrew oil plug (H, Figure 11) to fill. To drain,
remove drain plug on the underside of apron. Drain
oil completely and refill after the first three months of
operation. Then, change oil in the apron annually.
Fig. 12
6. V-Belts – Regularly check and adjust the tightness of
the v-belts to prolong their service life.
7.1 BALL OILER LOCATIONS
All ball oilers must be lubricated with SAE-20W oil (Mobil
DTE® Oil Heavy Medium), as follows. Refer to Figures 13
and 14.
7. Cross Slide – Daily lubricate one ball oiler on the
handwheel housing (K, Figure 14) and three ball oilers
on the platform (L, Figure 14).
E-1236VS
13
OO
L
7.2 COOLANT PREPARATION
!
Follow local regulations and/or coolant
manufacturer’s recommend-dations for use, care
M
and disposal.
N
O
P
O
K
Fig. 14
8. Compound Rest – Daily lubricate two ball oilers (M,
Figure 14) on top of compound rest.
9. Tool Post – Regularly clean dirt and coolant around the
tool post to maintain its re-positioning accuracy. Daily
lubricate one ball oiler on top the clamping hub (N,
Figure 14).
10. Saddle – Daily lubricate four ball oilers (O, Figure 14)
and one ball oiler on the handwheel shaft (P, Figure
14).
13. Tailstock – Daily lubricate two ball oilers (Figure 15) on
top of tailstock.
The anti-dust felt beneath the tailstock that runs along
the ways should be cleaned weekly with kerosene. If
the felts become damaged, replace them.
1. Remove access cover on the tailstock end of the
lathe stand (Figure 17). Make sure coolant pump
has not shifted during transport. Pour four gallons
(approximate) of coolant mix into the reservoir. Use the
gauge to determine when full.
2. After machine has been connected to power, turn on
coolant pump and check to see that coolant is cycling
properly. Flow is controlled by the tap at the base of
the nozzle.
3. Reinstall access cover.
To change coolant, remove access panel from rear of
lathe. Pull the coolant tray and dump dirty coolant. Clean
the tray of any chips or residue. Refill with proper amount
of new water soluble coolant.
Ball oilers
14
Fig. 17
Fig. 16
1236 Lathe
8.0 ELECTRICAL CONNECTIONS
9.0 BASIC CONTROLS
!
Electrical connections must be made by a
qualified electrician in compliance with all relevant
codes. This machine must be properly grounded
while in use to help protect the operator from
electrical shock and possible fatal injury.
The main motor is rated for 230 volt only. Confirm that
power available at the lathe’s location is the same rating as
the lathe.
IMPORTANT: The lathe must be wired properly
and phased correctly. The spindle should rotate
counterclockwise (as viewed from the tailstock end) while
the feed rod rotates clockwise (as viewed from the tailstock
end). If the phasing needs correction, disconnect lathe
from power source and switch any two of the three power
leads (not the green ground wire).
If wiring for single phase input, connect at R and T, as
shown in the wiring diagram in section 14.0.
Make sure the lathe is properly grounded.
A
G
E
H
B
C
I
Fig. 19
1. Control Panel: Located on front of headstock.
• Power Indicator Light (A, Figure 19).
Illuminates whenever lathe is receiving power.
• Coolant On-Off Switch (B, Figure 19).
Activates coolant pump.
• Jog Button (C, Figure 19).
Quickly press and release to rotate spindle.
• Emergency Stop Button (D, Figure 19).
Shuts down all machine functions.
D
F
E-1236VS
Cable receiver
Main switch
Fig. 18
Note: Lathe will still have power. Twist button
clockwise to reset.
• Motor Speed Switch (E, Figure 19).
Turn to select high or low speed.
2. Speed Selection Levers (F, Figure 19): Move levers
left or right to desired spindle speed, according to
accompanying chart.
3. Feed Direction Knob (G, Figure 19): Rotating the
knob changes direction of feed. Center position is
neutral.
!
Do not move feed direction knob (G) while
machine is running.
15
4. Lead and Feed Selector Levers (I, Figure 19):
Used conjunctively to set up for threading or feeding,
according to the accompanying chart (H, Figure 19).
R
K
O
U
J
Q
M
L
N
Fig. 20
5. Carriage Lock (J, Figure 20): Located on top right of
carriage. Turn clockwise to lock, counterclockwise to
unlock.
!
before changing directions. Position lever in neutral
position (tab in notch) before shutting off the lathe.
10. Feed Engagement Lever (L, Figure 20): Push to
one of three positions; Up for crossfeed; Down for
longitudinal; the middle position allows screws to be
cut by engaging the half nut.
11. Threading Dial (Q, Figure 20): Indicates the point on
the leadscrew where the half nut can be re-engaged
to continue inch threading.
12. Cross Slide Handwheel (R, Figure 20): Located
above the apron assembly. Clockwise rotation
moves the cross slide toward the rear of machine.
The accompanying scale is graduated in 0.002 inch
increments, and can be calibrated by loosening the
thumb screw lock and rotating the ring as needed.
Always re-tighten ring before using the feed.
The cross slide lock is located at the right of the cross
slide (S, Figure 21).
13. Compound Rest: Located on top of the cross slide
and can be rotated 360° after loosening the lock.
There are calibrations in degrees at the base of the
rest to assist in placement to the desired angle.
Carriage lock must be loose before moving
carriage or damage to lathe may occur.
6. Carriage Handwheel (K, Figure 20): Located on
the apron. Rotate handwheel clockwise to move the
carriage assembly toward the tailstock (right). Rotate
the wheel counterclockwise to move the carriage
assembly toward headstock (left). A scale is mounted
to the ring, graduated in 0.005 inch increments, and
can be calibrated by loosening the thumb screw lock
and rotating the ring as needed. Always retighten ring
before using the feed.
7. Feed Direction Lever (O, Figure 20): Push in to move
from left to right and pull out to move from right to left.
8. Half Nut Lever (M, Figure 20): Located on the front
of the apron assembly. Engages the leadscrew for
threading operations.
9. Spindle Direction Control Lever (N, Figure 20). Move
the lever to the right so that its tab clears the notch,
then down for forward spindle rotation, or up for reverse
spindle rotation. Allow the spindle to come to a stop
Compound
rest
S
Fig. 21
14. Compound Rest Handle (U, Figure 20): Rotate
clockwise or counterclockwise to position. The
accompanying scale on the collar is graduated in
0.001 inch increments.
15. Tailstock Quill Clamping Lever (W, Figure
22): Rotate clockwise to lock the sleeve. Rotate
counterclockwise to unlock.
16
1236 Lathe
W
10.0 OPERATION
The operator should consult shop manuals such as
“Machinery’s Handbook” for cutting speeds and feeds
appropriate to specific workpieces. Correct feed depends
upon material to be cut, cutting operation, tool type,
chucking rigidity, depth of cut, and desired surface quality.
IMPORTANT: Allow a break-in period for the new lathe so
Y
X
that gears and bearings can adapt; do not run the lathe
above 560 RPM for the first six hours of operation.
!
Fig. 22
17. Tailstock Quill Traverse Handwheel (X, Figure
22): Rotate clockwise to advance the quill and
counterclockwise to retract it. Fully retract it to eject a
center or drill chuck.
16. Tailstock Clamping Lever (Y, Figure 22): Lift up to
lock. Push down to unlock.
Foot break
18. Foot Brake (Figure 23): For emergency shutdown of
all lathe functions. The connecting rod mechanism is
in the bed stand, and activates a brake strap at the
main motor. (Caution: Lathe still has power.) The foot
brake is not intended for normal stopping of the lathe.
Overuse can result in hastened wear of brake parts.
Fig. 23
The following points must be observed when
operating the lathe:
• Never turn any handles or levers when spindle is
at high speed.
• Change spindle speed only after spindle stops.
• Change feed rate only when spindle is at low
speed or is stopped.
• Never exceed maximum speed limitation of the
work holding device.
• Before starting spindle, check that each handle
or lever is at correct position to ensure normal
engagement of gears. The spindle direction control
lever should be at neutral position.
• If the brake becomes ineffective, turn off machine
and adjust brake immediately.
• When operating spindle direction control lever,
always turn it to correct position; never use “preposition” for cutting at a reduced speed.
• Jaw teeth and scroll must be fully engaged, to
prevent the jaws from breaking and being thrown
from chuck (see Figure 24).
!
E-1236VS
Improper
engagement
Fig. 24
17
• Avoid long workpiece extensions, as parts may
bend or fly off (see Figure 25). Use rests or the
tailstock for support.
L
L > 3xD
D
Fig. 25
• Avoid short clamping contact (Figure 26, A) or
clamping on a minor part diameter (Figure 26, B).
Face-locate the workpiece for added support.
10.2 SPINDLE SPEED
The spindle speed is variable between 40 and 2000 RPM.
10.3 FEED AND THREAD SELECTION
To obtain various feed settings and thread pitches, the two
levers (I, Figure 27) are used conjunctively. Position the
two levers according to the Feed and Thread Chart on the
front of the headstock.
TIP: When selecting feed/speed correlations, remember
the general principal that high speeds complement fine
feeding, and low speeds are better for coarse feeding.
10.4 THREAD CUTTING
Threading is performed in multiple passes, with increasing
depths in succeeding cuts. It is recommended that test cuts
be made on scrap material and the results checked before
proceeding with regular material.
1. Move feed direction knob (G, Figure 27) to desired
direction, for right-hand or left-hand threads.
A
Insufficient contact
Small diameter clamping
B
Fig. 26
10.1 TOOL SETUP
The cutting angle is correct when the cutting edge is in
line with the center axis of workpiece. Use the point of the
tailstock center as a gauge and shims under the tool to
obtain correct center height.
Use a minimum of two clamping screws to secure each
tool.
2. Set spindle (F, Figure 27) to desired speed. Use lowest
speed possible when threading.
3. Select desired thread using thread pitch levers (I,
Figure 27) in conjunction with the charts on the
headstock.
4. Set feed direction lever (see L, Figure 20) to correct
position (neutral).
5. Engage the half nut (M, Figure 20). The half nut must
be engaged during the entire threading process when
doing metric, diametral, and modular threading.
6. When tool reaches end of cut, disengage and back out
the tool to clear the workpiece.
7. Reverse direction to allow cutting tool to return to its
starting point.
8. Repeat process until desired result is obtained.
18
1236 Lathe
Loosen screws
G
F
Coolant on/off
Jog button
I
E-Stop
Spindle Speed
adjustment
Fig. 27
11.0 ADJUSTMENTS
!
Adjustments to the lathe, especially those
involving alignments of bearings, spindle,
leadscrew, clutch, etc., should only be performed
by qualified personnel, as improper alignments
can damage the machine and/or create a safety
hazard.
Reversed jaw
Threading/
Carriage
traverse
selector
knob
Fig. 29
11.2 GIB ADJUSTMENTS
After a period of time, some moving components may
need adjustment for play (or “backlash”) due to wear. Do
not overtighten gib screws as this can hasten wear to
components.
Saddle – Turn screws on either side of saddle at the rear to
adjust drag on saddle.
Cross Slide – Gib screws are located at front and rear of
slide opposite to one another (A, Figure 30). To adjust drag,
loosen rear gib screw one turn, and tighten front gib screw
a quarter turn. Rotate handwheel to check play. Repeat as
needed until slide moves freely without play. Gently tighten
rear gib screw.
!
Turn off main switch and press emergency stop
button before making adjustments to lathe.
11.1 CHUCK JAW REVERSAL
The three jaws on the scroll chuck are reversible, to hold
stock with larger diameters. See Figure 29. Loosen two
screws with the provided hex key, remove jaw, and rotate
it 180-degrees. Re-install jaw, and tighten each screw in
increments until fully tightened.
B
A
Fig. 30
Compound Rest – Gib screws are located at front and
rear of compound rest (B, Figure 30). To adjust, use same
method as for Cross Slide.
E-1236VS
19
11.3 TAILSTOCK ADJUSTMENTS
The tailstock can be offset to cut shallow tapers up to 5°
angle. See Figure 32.
1. Loosen tailstock in position by lowering locking handle
(D).
2. Alternately loosen and tighten front and rear screws
(E). [Only front screw shown.]
The scale (F) on the end of the tailstock indicates amount
of offset, and helps when re-centering.
Gap Section
D
B
C
C
B
A
If the clamping force needs to be adjusted, use the hex nut
beneath the tailstock body.
D
F
E
Fig. 32
11.4 GAP SECTION
1. To remove the gap section (Figure 33), remove four
socket head cap bolts (A) and two socket bolts at the
ends of the rails (B).
Fig. 33
To reinstall gap section:
1. Thoroughly clean bottom and ends of gap section.
2. Set gap section in place and align the ends.
3. Insert the tapered pins into their holes through gap
and into lathe bed.
4. Re-insert the six bolts (A,B) and tighten alternately
until all are snug. Make sure gap remains aligned with
ways while tightening screws.
11.5 ALIGNING TAILSTOCK TO HEADSTOCK
Headstock and Tailstock have been aligned at the factory
and should not require attention. If future adjustment
should ever be needed, proceed as follows. (Make
sure that twist in the lathe bed is not contributing to the
problem; refer to sect. 8.1.)
1. Fit a 12” ground, center-drilled, steel bar between
centers of headstock and tailstock (Figure 34).
2. Remove two tapered alignment pins (C) by placing
the provided gap bridge pin driver (D) over them and
threading its screw down into them, until the pins are
loosened enough to be pulled out.
3. Remove gap section.
20
2. Fit a dial indicator to the top slide and traverse the
center line of the bar. If it indicates a taper, adjustment
is needed.
3. Align tailstock using the off-set screws at front and
back (see E, Figure 32) until tailstock is aligned.
1236 Lathe
12”
11.8 STEADY REST ADJUSTMENT
Always lubricate the fingers with grease before using
the steady rest. The point at which the fingers contact
the workpiece require continuous lubrication to prevent
premature wear.
Headstock
Tailstock clamp lever
Topslide
Set-over screws
Tailstock
Fig. 34
11.6 CROSS SLIDE NUT ADJUSTMENT
The cross slide moves via a lead screw which drives a nut.
This can be adjusted if backlash develops. Backlash is
identified by turning the cross slide handwheel left and right
– if there is a delay before any cross slide movement, the
nut needs adjusting.
Tighten or loosen the screw shown in Figure 35 until
backlash is adjusted out.
Screw for
backlash adjust
To set the steady rest (see Figure 36):
1. Loosen hex nut (A) to slide steady rest along the ways.
2. Loosen knurled handle (B) until it can be pivoted out of
the slot.
3. Loosen three lock knobs (C), and back off the fingers
(D) using knurled handles (E).
4. Pivot the collar on its hinge and position steady rest
around workpiece.
5. Firmly tighten hex nut (A).
6. Set the fingers snugly to work piece and secure by
tightening locking knobs. Fingers should be snug but
not overly tight.
E
C
B
D
C
E
A
C
E
Fig. 36
11.7 SHEAR PIN REPLACEMENT
The lead screw and feed shaft are equipped with shear
pins, which are designed to break in order to protect the
drive system against overload. A broken shear pin must be
replaced.
Knock out the broken pin; line up the holes and insert
new pin.
E-1236VS
Fig. 35
11.9 FOLLOW REST ADJUSTMENT
The follow rest mounts to the saddle with two socket
head cap bolts. The follow rest should be mounted so that
locking knobs point away from chuck.
The sliding fingers are set similar to those on the steady
rest – free of play, but not binding.
Always lubricate the fingers sufficiently with grease before
operating.
21
12.0 RECOMMENDED CUTTING SPEED
OF LATHE
13.0 REPLACEMENT PARTS —
E-1236VS
Workpiece material Speed (sfm) Feed (lpr)
Aluminum 2021 to 6061 500 0.002
Brass 75 0.001
Bronze 70 0.001
Cast Iron Gray 35 to 125 0.0015 to 0.004
Ductile 15 to 125 0.001 to 0.004
Malleable 35 to 170 0.0015 to 0.003
Copper 101 to 757 85 to 90 0.002
834 to 978 340 0.003
Magnesium AZ, AM, EZ, ZE, HK
types
Nickel Nickel 200 to 230 85 0.002
Monel 15 to 60 0.001 to 0.0015
Inconel, Waspaloy 15 0.002
Hastelloy 10 to 15 0.002
Plastic TFE, CTFE 250 0.002
Nylon 350 0.002 to 0.003
Phenolic 350 0.003
Stainless Steel 201 to 385 65 to 85 0.001 to 0.0015
405 to 446 90 0.0011
15-5 PH, 16-6 PH,
14-4 PH
Steel 1005 to 1029 80 to 140 0.001 to 0.002
1030 to 1055 35 to 115 0.0009 to 0.0015
1060 to 1095 30 to 80 0.0007 to 0.001
10L45 to 10L50 40 to 140 0.0009 to 0.0015
12L13 to 12L15 225 to 280 0.003 to 0.0035
41L30 to 41L50 20 to 110 0.0007 to 0.0015
4140 to 4150 20 to 115 0.0007 to 0.0015
4140 (35 HRC) 70 0.001
8617 to 8622 40 to 120 0.001 to 0.0016
M-1 to M-6 60 0.0013
H-10 to H-19 20 to 80 0.007 to 0.0011
D-2 to D-7 45 to 60 0.001
A-2 to A-9, 01 to 07 45 to 60 0.001
W-1, W-2 110 0.0015
M-50, 52100 20 to 85 0.0007 to 0.0015
Titanium TI-6AI-6V 45 0.001
500 0.002
30 to 60 0.0006 to 0.0012
Replacement parts are listed on the following pages.
To order parts or reach our service department, call
1-855-336-4032, 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.
®
JET
427 New Sanford Road
LaVergne, Tennessee 37086
www.jettools.com
Phone: 855-336-4032
22
1236 Lathe
Loading...