JET SWG-272VS Operating Instructions and Parts Manual

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Operating Instructions and Parts Manual

2 x 72-inch Square Wheel Belt Grinder

Model SWG-272, SWG-272VS

Variable speed model

Single speed model

shown with platen assembly

JET

1.0 IMPORTANT SAFETY

INSTRUCTIONS

- Misuse of this machine can cause serious injury.

- For safety, machine must be set up, used and serviced properly.

- Read, understand and follow instructions in the operator’s manual and all labels affixed to the machine.

When setting up machine:

- Always avoid using machine in damp or poorly lighted work areas.

- Always be sure machine is securely anchored to the floor or bench.

- Always keep machine guards in place.

- Always put start switch in OFF position before plugging in machine.

When using machine:

- Never operate with machine guards missing.

- Always wear safety glasses with side shields (See ANSI Z87.1)

- Never wear loose clothing or jewelry.

- Never overreach ⎯ you may slip and fall into the machine.

- Never leave machine running while you are away from it.

- Always shut off the machine when not in use.

When servicing machine:

- Always unplug machine from electrical power while servicing.

- Always follow instructions in operators and parts manual when changing accessory tools or parts.

- Never modify the machine without consulting JET.

1.1 Machinery general safety

warnings

1. Always wear protective eye wear when operating machinery. Eye wear shall be impact resistant, protective safety glasses with side shields which comply with ANSI Z87.1 specifications. Use of eye wear which does not comply with ANSI Z87.1 specifications could result in severe injury from the breakage of the eye protection.

2. Wear proper apparel. No loose clothing or jewelry which can get caught in moving parts. Contain long hair. Rubber soled, nonslip footwear is recommended for best footing.

3. Do not overreach. Failure to maintain a proper working position can cause you to fall into the machine or cause your clothing to get caught — pulling you into the machine.

4. Keep guards in place and in proper working order. Do not operate the machine with the guards removed.

5. Avoid dangerous working environments. Do not use stationary machine tools in wet or damp locations. Keep work areas clean and well lit.

6. Avoid accidental starts by being sure that the start switch is in the “OFF” position before plugging in the machine.

7. Never leave the machine running while unattended. The machine shall be shut off whenever it is not being used.

8. Disconnect the electrical power before servicing, whenever changing accessories or when general maintenance is done on the machine.

9. Maintain all machine tools with care. Follow all maintenance instructions for lubricating and the changing of accessories. No attempt shall be made to modify or have makeshift repairs done to the machine. This not only voids the warranty but also renders the machine unsafe.

10. If there is any risk of tipping or sliding, the machinery must be anchored to the floor.

11. Secure your work. Use clamps or a vise to hold your work, when practical. It is safer than using your hands and it frees both hands to operate the machine.

12. Never brush chips away while the machine is in operation.

13. Keep work area clean. Cluttered areas invite accidents.

14. Remove adjusting keys and wrenches before turning the machine on.

15. Use the right tool. Don’t force a tool or attachment to do a job for which it was not designed.

16. Use only recommended accessories and follow manufacturer’s instructions pertaining to them.

17. Keep hands in sight and clear of all moving parts and cutting surfaces.

18. All visitors should be kept at a safe distance from the work area. Make your workshop completely safe by using padlocks, master switches, or by removing starter keys.

19. Know the tool you are using; its application, limitations, and potential hazards.

20. This machine must be grounded in accordance with the National Electrical Code and local codes and ordinances. The work should be done by a qualified electrician. The machine should be grounded to protect the user from electrical shock.

1.2 Safety requirements for abrasive

grinding machines

Abrasive grinding can be hazardous to operators and bystanders. Grinding sparks, chips and dust particles thrown off by the grinding disc or belt can cause serious injury by contact or inhalation. To avoid such injuries you must comply with the following safety requirements:

1. Always wear protective eyewear when operating machinery. Eye wear shall be impact resistant, protective safety glasses with side shields which comply with ANSI Z87.1.

2. Wear leather safety gloves, arm guards, leather aprons and safety shoes.

3. A dust collection system is recommended, Operator shall also wear a dust mask at all times. See Figure B, below.

4. Additional precautions may be necessary for grinding materials which are flammable or have other hazardous properties. You should always consult the manufacturer of such materials for instructions on grinding and handling.

5. Do not force or jamb the workpiece into the grinding disc/belt.

6. Before grinding, always allow the motor to come up to operating speed, then check the grinding disc for wobble, runout, or any unbalanced condition. If the disc is not operating accurately and smoothly, immediately stop the motor and make repairs before attempting any grinding operations.

7. Abrasives must be stored in a controlled environment area. Relative humidity should be 35% to 50% and the temperature should be between 60 and 80 degrees Fahrenheit. Failure to do so could cause premature abrasive failure.

8. Examine the face of the grinding disc/belt carefully. Excessive grinding which wears down to the backing material can tear the abrasive.

9. Never use an abrasive which shows backing, nicks or cuts on the surface or edge or damage due to creasing or poor handling.

10. Always present the workpiece to the wheel while resting the workpiece firmly on the table. Failure to do so could result in damage to the workpiece or throwing of the workpiece off the wheel.

11. Safety shoes which comply with ANSI Z41.1 shall be worn. See Figure C.

12. Personal hearing protection such as ear plugs or ear muffs shall be used to protect against the effect of noise exposure. See Figure D.

WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to http://www.p65warnings.ca. gov.

WARNING: Some dust, fumes and gases created by power sanding, sawing, grinding, drilling, welding and other construction activities contain chemicals known to the State of California to cause cancer and 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 wellventilated area and work with approved safety equipment, such as dust masks that are specifically designed to filter out microscopic particles. For more information go to http://www.p65warnings.ca.gov/ and http://www. p65warnings.ca.gov/wood.

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.

not heeded, it may result in serious, or possibly even fatal, injury.

This means that if precautions are

2.0 About this machine and manual

The JET SWG-series Square Wheel Belt Grinders are designed for grinding, deburring, chamfering, and internal/external grinding of small and large parts. The Grinders can be used to polish or buff finished parts and grind small internal radii using available accessories. Accessory changeover is quick and easy. Belt tension and tracking are easily adjustable.

This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model SWGseries Square Wheel Belt Grinder. 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 consistent, long-term operation if used in accordan`ce with the instructions set forth in this document.

This document is not, however, intended to be an exhaustive guide to grinding operations or choice of metal stock. Consult machinery handbooks, web forums, or experienced users if additional information is needed. Safety of user and bystanders must always be first priority.

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.

Read and understand the entire contents of this manual before attempting assembly or operation. Failure to comply may cause serious injury.

http://www.jettools.com/us/en/service-and-support/product-registration/

3.0 Table of contents

Section Page

1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2

1.1 Machinery general safety warnings ............................................................................................................ 2

1.2 Safety requirements for abrasive grinding machines ................................................................................. 3

2.0 About this machine and manual ..................................................................................................................... 4

3.0 Table of contents ............................................................................................................................................ 5

4.0 Specifications for SWG-series Grinders ......................................................................................................... 6

4.1 Hole spacing, SWG-272 / -272VS .............................................................................................................. 7

5.0 Setup and assembly ....................................................................................................................................... 8

5.1 Contents of carton ...................................................................................................................................... 8

5.1 Location ...................................................................................................................................................... 8

5.2 Installing work rest ...................................................................................................................................... 8

5.3 Installing dust hood .................................................................................................................................... 8

6.0 Electrical connections .................................................................................................................................... 9

6.1 GROUNDING INSTRUCTIONS ................................................................................................................. 9

6.2 Voltage conversion ..................................................................................................................................... 9

6.3 Extension cords ........................................................................................................................................ 10

7.0 Adjustments ................................................................................................................................................. 10

7.1 Platen or Wheel installation ...................................................................................................................... 10

7.2 Platen wheel adjustment .......................................................................................................................... 10

7.3 Installing/replacing grinding belt ............................................................................................................... 11

7.4 Belt tracking .............................................................................................................................................. 11

8.0 Operation ..................................................................................................................................................... 12

8.1 Controls .................................................................................................................................................... 12

8.2 Typical uses for the Square Wheel Belt Grinder ...................................................................................... 13

9.0 User-maintenance ........................................................................................................................................ 14

9.1 Cleaning ................................................................................................................................................... 14

9.2 Lubrication ................................................................................................................................................ 14

9.3 Contact wheel replacement ...................................................................................................................... 14

9.4 Additional servicing .................................................................................................................................. 14

10.0 Optional accessories .................................................................................................................................. 14

11.0 Troubleshooting SWG-series Square Wheel Grinders .............................................................................. 15

12.0 Replacement Parts ..................................................................................................................................... 15

12.1.1 SWG-272 Square Wheel Belt Grinder – Exploded View ..................................................................... 16

12.1.2 SWG-272 Square Wheel Belt Grinder – Parts List .............................................................................. 17

12.2.1 SWG-272 Motor Assembly – Parts List and Exploded View ............................................................... 18

12.3.1 SWG-272 Push Button Switch Assembly – Parts List and Exploded View ......................................... 19

12.4.1 SWG-272VS Square Wheel Belt Grinder – Exploded View ................................................................ 20

12.4.2 SWG-272VS Square Wheel Belt Grinder – Parts List ......................................................................... 21

12.5 SWG-272VS Motor Assembly – Parts List and Exploded View ............................................................. 22

12.6 SWG-272VS Control Switch Assembly – Parts List and Exploded View ............................................... 23

12.7 Idler Housing Casting Assembly (all models) – Parts List and Exploded View ...................................... 24

12.8 Platen Assembly (all models) – Parts List and Exploded View .............................................................. 25

12.9 Contact Wheel Assembly (all models) – Parts List and Exploded View ................................................. 26

12.10 Dust Hood Assembly (all models) – Parts List and Exploded View ..................................................... 27

13.0 Electrical Connections ................................................................................................................................ 28

13.1 Wiring diagram for SWG-272 ................................................................................................................. 28

13.2 Wiring diagram for SWG-272VS ............................................................................................................ 28

14.0 Warranty and Service ................................................................................................................................. 29

4.0 Specifications for SWG-series Grinders

Table 1

Model number

SWG-272 SWG-272VS

Stock number 577400 577405

Motor and Electricals

Motor type Totally enclosed industrial Totally enclosed fan cooled, inverter Horsepower 1 HP

Motor phase Single

(but single phase input to inverter)

3 phase motor

Motor voltage 115/230 V (prewired 115V) Cycle 60 Hz Listed FLA (full load amps) 11 / 5.5 A 13 / 6.5 A Motor speed 1,750 RPM 1800 RPM Start capacitor 400MFD 125VAC n/a

Run capacitor

45F 350VAC

n/a

Power transfer Direct drive

On/off switch

Push button w/ power indicator

and safety key

Toggle switch with safety cover;

Membrane switch inverter panel Power cord SJT 16AWGx3C, 6 ft. Power plug 5-15P, 125V/15A installed Recommended circuit size 1 15 A Sound emission 2 80 dB at 3ft. without load

Base

Footprint, L x W 35-7/16 x 16-15/16 in. (900 x 430 mm) Mounting hole dimensions Dia. 7/16 in. (11mm)

Belt Grinder

Belt included, L x W 50 grit; 72 x 2 in. (1829 x 50.8 mm) Belt speed, SFPM 4,600 2,000~6,200 Contact wheels included, Dia. x W 1-1/2 x 2 in. (38 x 50.8 mm) smooth

3 x 2 in. (76.2 x 50.8 mm) smooth

8 x 2 in. (203.2 x 50.8 mm) serrated Dust port diameter 3 in. (76.2 mm)

Main materials

Frame Steel Contact wheel, 8-inch Rubber, 90 Durometer Contact wheel, 3 x 2-inch Rubber, 70 Durometer Contact wheel, 1.5 x 2-inch Rubber, 70 Durometer Idler wheel Rubber Drive wheel Aluminum Platen Steel Head casting Cast iron

Dimensions

Overall dimensions L x W x H 35-7/16 x 17 x 21-1/4 in.

(900 x 433 x 540 mm)

35-7/16 x 17 x 21-27/32 in.

(900 x 433 x 555 mm) Shipping dimensions L x W x H 34-1/4 x 21-1/4 x 22-7/16 in. (870 x 540 x 570 mm)

Weights

Net weight 126 lb. (57.27 kg) 131 lb. (59.54 kg) Shipping weight 162 lb. (73.64 kg) 167 lb. (75.90 kg)

subject to local/national electrical codes.

The specified values are emission levels and are not necessarily to be seen as safe operating levels. As workplace

conditions vary, this information is intended to allow the user to make a better estimation of the hazards and risks involved only.

L = length, W = width, H = height, Dia. = diameter

The specifications in this manual were current at time of publication, but because of our policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations.

4.1 Hole spacing, SWG-272 / -272VS

All dimensions millimeters

Figure 4-1

Read and understand all

assembly instructions before attempting assembly. Failure to comply may cause serious injury.

Note: Some illustrations in this manual may be representative only, and not show your specific model.

5.0 Setup and assembly

5.1 Contents of carton

1 Grinder 1 Serrated contact wheel 8”x2” (installed) 1 Abrasive belt (installed) 1 Operating Instructions and Parts Manual 1 Product registration card

Uninstalled accessories (Figure 5-1): 1 Work rest 1 Adjustable handle 3/8x3/4” 1 Flat washer 3/8” 1 Platen assembly 1 Rail 1 Channel slide 2 Hand knobs 5/16x1 2 Socket hd cap screws 1/4x1/2 2 Lock washers 1/4 1 Dust hood

5.1 Location

It is strongly recommended that the machine be secured to a bench or stand. The base has multiple holes (some are accessed behind the side panel) to accept fasteners for this purpose. Sect. 4.1 shows the hole patterns.

An optional JET stand is available for this machine. See sect. 10.0. Use the 4 holes in front of the motor to secure to this stand.

5.2 Installing work rest

The work rest mounts to a channel on left side of head casting. See Figure 5-2. Attach work rest with adjustable handle. Slide work rest inward until it is about 1/16 inch from front of contact wheel. Tighten cap screw.

5.3 Installing dust hood

It is recommended that the dust hood be used, and connected to a metal dust collection system by a 3inch diameter hose secured with a hose clamp (not provided).

Assemble dust hood parts as shown in Figure 5-2. Also, secure the rail below the stand using the 2 socket head screws with lock washers (A, Figure 5-

2). Slide the dust hood assembly onto the rail and tighten with the knobs.

The dust hood can be positioned as needed below the contact wheel.

Figure 5-1: contents (not to scale)

Figure 5-2: work rest and dust hood

6.0 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.

The SWG-272 and 272VS Square Wheel Grinder is pre-wired for 115V power. It may be converted to 230V power; see sect. 6.2.

It is recommended that the grinder be connected to a dedicated minimum 15-amp circuit with circuit breaker or fuse. If connected to a circuit protected by fuses, use time-delay fuse marked “D”. Local codes take precedence over recommendations.

6.1 GROUNDING INSTRUCTIONS

1. All Grounded, Cord-connected Tools:

This machine must be grounded. In the event of a malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce the risk of electric shock. This tool is equipped with an electric cord having an equipment-grounding conductor and a grounding plug. The plug must be plugged into a matching outlet that is properly installed and grounded in accordance with all local codes and ordinances.

Do not modify the plug provided - if it will not fit the outlet, have the proper outlet installed by a qualified electrician.

Improper connection of the equipment-grounding conductor can result in a risk of electric shock. The conductor with insulation having an outer surface that is green with or without yellow stripes is the equipment-grounding conductor. If repair or replacement of the electric cord or plug is necessary, do not connect the equipment-grounding conductor to a live terminal.

Before connecting to power source, be sure the switch is in off position.

Check with a qualified

electrician or service personnel if the grounding instructions are not completely understood, or if in doubt as to whether the tool is properly grounded. Failure to comply may cause serious or fatal injury.

Use only 3-wire extension cords that have 3-prong grounding plugs and 3-pole receptacles that accept the tool's plug.

Repair or replace damaged or worn cord immediately.

2. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating less than 150 volts:

This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in A, Figure 6-1. An adapter, shown in B and C, may be used to connect this plug to a 2-pole receptacle as shown in B if a properly grounded outlet is not available. The temporary adapter should be used only until a properly grounded. The green-colored rigid ear, lug, and the like, extending from the adapter must be connected to a permanent ground such as a properly grounded outlet box.

In Canada, the use of a temporary adaptor is not permitted by the Canadian Electrical Code, C22.1.

3. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating between 150 - 250 volts, inclusive:

This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in D, Figure 6-1. The tool is intended to be used with a grounding plug that looks like the plug illustrated in D. Make sure the tool is connected to an outlet having the same configuration as the plug. No adapter is available or should be used with this tool. If the tool must be reconnected for use on a different type of electric circuit, the reconnection should be made by qualified service personnel; and after reconnection, the tool should comply with all local codes and ordinances.

Figure 6-1

6.2 Voltage conversion

The grinder is prewired for 115 volt input power, but can be converted to 230 volt input, as follows.

6.2.1 Single speed model (SWG-272)

1. Open motor junction box cover, and reconnect the leads according to diagram inside cover. See sect. 14.0 for similar diagram. (Note: In case of discrepancy, diagram on junction cover takes precedence.)

2. Remove existing plug from power cable and attach a UL/CSA listed plug designed for 230V power; or “hardwire” the machine directly to a panel. If hardwiring make sure a disconnect is provided for the operator.

6.2.2 Variable speed model (SWG-272VS)

1. Remove existing plug from power cable and attach a UL/CSA listed plug designed for 230V power; or “hardwire” the machine directly to a panel. If hardwiring make sure a disconnect is provided for the operator.

No internal rewiring is needed for the inverter to accept the new input voltage.

6.3 Extension cords

The use of extension cords is discouraged; try to position your machine within reach of the power supply. If an extension cord becomes necessary, make sure the cord rating is suitable for the amperage listed on the machine’s motor plate. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating.

Use the chart in Table 2 as a general guide in choosing the correct size cord. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.

Recommended Gauges (AWG) of Extension Cords

Amp Rating Volts Total length of cord in feet

120

More Than

10 12 16 16 14 12

12 16 14 12

Not More Than

0 6 18 16 16 14

6 10 18 16 14 12

240

100

AWG

Table 2

100 200

Recommended

150 300

Not

7.0 Adjustments

7.1 Platen or Wheel installation

Move switch to OFF to avoid

personal injury.

To install either the platen or the 8-inch serrated wheel:

1. Pull out on tension lever (shown in Figure 7-3) and lower it, to release tension on the belt.

2. Loosen knob and raise upper guard (see Figure 7-2). Open side panel by turning its knob and lowering panel on its hinges.

3. Loosen clamp handle on head casting. See Figure 7-1.

4. Install pivot shaft of platen (or shaft of wheel) all the way into head casting, as shown in Figure 7-1.

5. Position platen as desired:

 For grinding flat or angular workpieces,

position platen with platen surface facing outward.

 For grinding of cylindrical workpieces,

position platen with “yoke” side facing outward.

6. Set platen at desired angle and tighten clamp handle.

[See sect. 7.2 before installing belt, then return to step #7.]

7. Install and track the abrasive belt (see sect. 7.3 and 7.4).

8. Raise tension lever to set belt tension. Do not overtighten.

9. Bring upper guard down into position and adjust so that it will not contact abrasive belt. Tighten upper guard knob.

10. Adjust work rest to 1/16 inch from belt.

Figure 7-1: installing platen assembly

7.2 Platen wheel adjustment

The platen wheels have eccentric shafts, which allow adjustment of the wheels in relation to the platen, either flush to platen or according to user needs. See Figure 7-1a.

Remove the abrasive belt from the platen, and remove the work rest. Place a straight edge on the platen and across both wheels. Turn one or both shaft screws (A) as needed.

Figure 7-1a: wheel-to-platen adjustment

7.3 Installing/replacing grinding belt

Do not operate machine with

side panel open.

1. Lower belt tension lever (see Figure 7-3) to release tension on belt.

2. Loosen knob and raise upper guard (see Figure 7-2). Open side panel by turning its knob and lowering panel on its hinges.

3. If required, loosen work rest to provide clearance for belt removal.

4. Remove belt from drive wheel, idler wheel, and contact wheel. Install replacement belt centered over drive wheel, idler wheel, and contact wheel. Make sure direction arrows on belt match machine operation.

5. Raise belt tension lever to tighten belt against the wheels. Tighten belt until it is just taut. Do not over-tension the abrasive belt. A moderate tension will provide faster cutting, longer belt life, and better tracking.

7.4 Belt tracking

Do not operate machine with

side panel open.

1. Loosen knob and raise upper guard. Open side panel by turning its knob.

2. Spin drive wheel by hand and check tracking of belt. If belt tracks to right or left, adjustment is required.

3. Turn idler adjust screw (Figure 7-3) clockwise to cause belt to track right. Turn idler screw counterclockwise to cause belt to track left. Perform this in small increments and allow belt to respond to the changes.

4. Close side panel and secure by turning knob on panel. Lower upper belt guard and secure with knob.

5. Turn on grinder. Check belt tracking; belt should remain centered on contact wheel. Make further adjustments as needed according to step #3.

6. If belt still does not track properly, increase belt tension and repeat steps 1 through 5.

7. The set screw in the idler casting (see Figure 73a) can be turned to adjust the angle of the idler, and make the belt completely parallel to the three wheels (contact, drive and idler).

Excessive belt tension will

reduce belt life and cause excessive wear of contact wheel bearings. Belt tension should only be sufficient to allow proper tracking.

6. Check belt tracking; see sect. 7.4.

Figure 7-2: belt replacement

Figure 7-3: belt tracking

Figure 7-3a: set screw

8.0 Operation

8.1 Controls

8.1.1 Variable speed model (SWG-272VS)

To activate machine, lift the red switch cover and pull up the toggle switch to start the machine. To stop, simply push down the red cover.

Press on/off button on keypad (Figure 8-1) to start or stop belt action. Press any of the numbered buttons to start machine at the designated speed. Press arrow buttons to change rotation speed in 100 RPM increments.

The digital readout displays RPM (revolutions per minute), and will flash briefly during start up and speed adjustments.

The control panel will automatically shut off after 10 minutes of inactivity.

8.1.2 Single speed model (SWG-272)

See Figure 8-2.

Pull the red “mushroom” switch outward to start machine. The green light will illuminate. Push back in to stop machine; green light will turn off.

To prevent accidental or unauthorized operation, stop the machine and pull out the yellow safety key. The key must be reinserted to start the machine. (Push key all the way in until a “snap” sound is heard.)

Figure 8-2: standard control

Figure 8-1: variable speed control

8.2 Typical uses for the Square Wheel Belt Grinder

Figure 8-3

9.0 User-maintenance

Always disconnect power to machine before performing maintenance. Failure to comply may result in serious personal injury.

9.1 Cleaning

Shut off machine and disconnect before cleaning. Keep machine exterior clean and free of chips. Use a brush or vacuum to remove grinding dust and particles – do not use bare hands. Do not use compressed, as this may force metal debris into critical areas of the machine.

Frequently empty grinding dust from any attached dust collection system.

9.2 Lubrication

Lubrication of the grinder is not required. The drive motor and contact wheel are fitted with prelubricated and sealed bearings.

7. Install bearings in new contact wheel.

8. Install shaft and secure with retaining ring.

9. Mount new contact wheel to machine. Refer to sect. 7-1 for instructions on completing the installation.

Figure 9-1: contact wheel replacement

9.4 Additional servicing

9.3 Contact wheel replacement

Move switch to OFF to avoid

personal injury.

If the contact wheel becomes worn, a new contact wheel can be assembled to the existing wheel shaft and bearings (refer to Figure 9-1):

1. Lower tension lever to release belt tension.

2. Loosen upper guard knob and swing guard back for clearance.

3. Loosen handle on head casting.

4. Remove contact wheel assembly.

5. Remove the C-retaining ring (6-4) from wheel shaft.

6. Remove shaft (6-2) and bearings (6-3) from the old wheel.

Any additional servicing should be performed by authorized service personnel.

10.0 Optional accessories

578173 DBG Stand

414852 3” Hose Clamps (2 pcs)

DBG Stand

11.0 Troubleshooting SWG-series Square Wheel Grinders

Table 2

* WARNING: Some corrections may require a qualified electrician.

Symptom Possible Cause Correction *

Machine won’t start.

Machine won’t attain full speed.

Poor tracking. Low voltage. Check power line for proper voltage.

Slack belt. Insufficient belt tension. Set tension so belt is just taut.

No incoming power. Verify machine connections.

Cord damaged. Replace cord.

Building circuit breaker trips or fuse blows.

Motor overloaded.

Motor or switch failure.

Extension cord too light or too long. Replace with adequate size extension cord.

Low current. Have voltage checked by qualified electrician.

Incorrect belt tension. Set tension so belt is just taut.

Worn contact surfaces. Check contact wheels for wear. Replace worn or

Misaligned contact surfaces. Check alignment of drive wheel and contact

Lack of crown on drive wheel. Check for 1/16-inch crown. Replace drive wheel

Worn bearings. Check all bearings for overheating or damage.

Verify that machine is on a circuit of correct size, preferably a dedicated circuit. If circuit size is correct, there may be a loose electrical lead.

Vacuum motor fan area to promote proper air circulation. (Do NOT use compressed air.)

Allow machine to cool, then restart.

Have tested by qualified electrician or motor repair shop, replace if needed.

warped wheels.

wheel - they must be aligned. To adjust drive wheel, loosen set screws and move drive wheel in or out on motor shaft as required. To adjust contact wheel, loosen shaft clamping screw and move contact wheel in or out as required.

if crown is not present.

Replace worn or damaged bearings.

Contact wheel wear. Excessive belt tension. Set tension so belt is just taut.

Grinding in one area on belt. Use entire width of belt whenever possible.

Excessive grinding deposits on belt and debris in machine.

Short belt life. Excessive grinding pressure. Allow the belt to do the cutting. Excessive

Clean abrasive belt and grinder interior.

pressure dulls the belt and removes the grit.

12.0 Replacement Parts

Replacement parts are listed on the following pages. Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET. Some parts are shown for reference only, and may not be available individually.

To order replacement parts, use one of the methods below. Have the Model Number and Serial Number of your machine available when you contact us for quick and accurate service.

Website: store.jettools.com (accessible 24 hours daily, 7 days per week)

Phone: 1-800-274-6846 (M - F, 8:00 a.m. to 5:00 p.m. CST)

E-mail: customerservice@jpwindustries.com

12.1.1 SWG-272 Square Wheel Belt Grinder – Exploded View

12.1.2 SWG-272 Square Wheel Belt Grinder – Parts List

Index No Part No Description Size Qty

1 ................ SWG272-01 .............. Main Frame ............................................................. ...................................... 1

2 ................ SWG272-02 .............. Guard Flap ............................................................... ...................................... 1

3 ................ SWG272-03 .............. Door ......................................................................... ...................................... 1

4 ................ SWG272-04 .............. Idler Housing Casting Assembly .............................. ...................................... 1

5 ................ SWG272-05 .............. Platen Assembly ...................................................... ...................................... 1

6 ................ SWG272-06 .............. Contact Wheel Assembly......................................... 8”x2” Serrated,90Duro .. 1

7 ................ SWG272-07 .............. Head Casting ........................................................... ...................................... 1

8 ................ SWG272-08 .............. Work Rest ................................................................ ...................................... 1

9 ................ SWG272-09 .............. Adjustable Handle ................................................... 3/8 x 3/4 ........................ 3

10 .............. TS-0680041 .............. Flat Washer ............................................................. 3/8 ................................. 3

12 .............. SWG272-12 .............. Adjustable Handle ................................................... 3/8 x 1 ........................... 1

13 .............. SWG272-13 .............. Idler Housing Pin Cap .............................................. ...................................... 1

14 .............. TS-0267021 .............. Set Screw ................................................................ 1/4 x 1/4 ........................ 1

15 .............. SWG272-15 .............. O-Ring ..................................................................... 1/2 ................................. 1

16 .............. SWG272-16 .............. Oilite Bushing .......................................................... ...................................... 1

17 .............. SWG272-17 .............. Nylon Flat Washer ................................................... 1/2 ................................. 1

18 .............. SWG272-18 .............. Hand Knob ............................................................... 5/16 x 1 ......................... 1

19 .............. SWG272-19 .............. Nylon Flat Washer ................................................... 5/16 ............................... 3

20 .............. BB-6200ZZ ................ Ball Bearing ............................................................. 6200ZZ ......................... 2

21 .............. SWG272-21 .............. Idler Wheel .............................................................. OD3” x W2” ................... 1

.................. SWG272-21E ............ Idler Wheel Assembly (include #20) ........................ ...................................... 1

22 .............. TS-0680021 .............. Flat Washer ............................................................. 1/4 ................................. 1

23 .............. TS-0561021 .............. Hex Nut .................................................................... 5/16 ............................... 3

24 .............. SWG272-24 .............. Drive Wheel ............................................................. OD10” x B7/8” .............. 1

25 .............. TS-0267041 .............. Set Screw ................................................................ 1/4 x 3/8 ........................ 1

26 .............. SWG272-26 .............. Key .......................................................................... 5 x 5 x 40 mm ............... 1

27 .............. TS-0051091 .............. Hex Cap Screw ........................................................ 5/16 x 2 ......................... 1

28 .............. TS-0720081 .............. Lock Washer ............................................................ 5/16 ............................... 2

29 .............. SWG272-29 .............. Cam Latch ............................................................... ...................................... 1

30 .............. SWG272-30 .............. Hand Knob ............................................................... 5/16 ............................... 1

31 .............. TS-1541011 .............. Nylon Lock Hex Nut ................................................. M5 ................................. 6

32 .............. TS-1513021 .............. Socket HD Flat Screw ............................................. M5 x 12 ......................... 6

33 .............. SWG272-33 .............. Motor Assembly ....................................................... 1HP, 115/230V ............. 1

34 .............. TS-0720091 .............. Lock Washer ............................................................ 3/8 ................................. 4

35 .............. TS-0060031 .............. Hex Cap Screw ........................................................ 3/8 x 3/4 ........................ 4

36 .............. TS-0720111 .............. Lock Washer ............................................................ 1/2 ................................. 1

37 .............. F007488 .................... Hex Cap Screw ........................................................ 1/2-13 x 3/4 ................... 1

38 .............. SWG272-38 .............. Push Button Switch Assembly ................................. ...................................... 1

39 .............. SWG272-39 .............. Abrasive Belt .......................................................... 2 x 72, 50 Grit ............... 1

40 .............. SWG272-40 .............. Dust Hood Assembly ............................................... ...................................... 1

12.2.1 SWG-272 Motor Assembly – Parts List and Exploded View

Index No Part No Description Size Qty

33-1 ........... SWG272-331 ............ End Cover ................................................................ ...................................... 1

33-2 ........... BB-6205ZZ ................ Ball Bearing ............................................................. 6205ZZ ......................... 1

33-3 ........... SWG272-333 ............ Shaft w/ Rotor .......................................................... ...................................... 1

33-4 ........... SWG272-334 ............ Motor Housing w/ Stator .......................................... ...................................... 1

33-5 ........... BB-6203ZZ ................ Ball Bearing ............................................................. 6203ZZ ......................... 1

33-6 ........... SWG272-336 ............ End Cover ................................................................ ...................................... 1

33-7 ........... IBG8-42 ..................... Screw ....................................................................... M5 x 205 ....................... 4

33-8 ........... SWG272-338 ............ Centrifugal Switch Assembly ................................... 4P ................................. 1

33-9 ........... SWG272-339 ............ Dust Cover ............................................................... ...................................... 1

33-10 ......... F001235 .................... Phillips Pan Head Machine Screw ........................... #10-24 x 1/4 ................ 10

33-11 ......... SWG272-3311 .......... Cooling Fan ............................................................. ...................................... 1

33-12 ......... SWG272-3312 .......... Fan Cover ................................................................ ...................................... 1

33-13 ......... SWG272-3313 .......... Junction Box Seat .................................................... ...................................... 1

33-14 ......... SWG272-3314 .......... Terminal Block ......................................................... ...................................... 1

33-15 ......... F000233 .................... Phillips Pan Head Machine Screw ........................... #10-24 x 1/2 .................. 2

33-16 ......... F000231 .................... Phillips Pan Head Machine Screw ........................... #10-24 x 3/8 .................. 1

33-17 ......... SWG272-3317 .......... Junction Box Cover ................................................. ...................................... 1

33-18 ......... IBG10-51 ................... Running Capacitor ................................................... 45uF, 350VAC .............. 1

33-19 ......... IBG10-06 ................... Start Capacitor ......................................................... 400MFD, 125VAC ......... 1

33-20 ......... IBG10-07 ................... Capacitor Cover ....................................................... ...................................... 1

33-21 ......... SWG272-3321 .......... Capacitor Protective Cover ...................................... ...................................... 2

12.3.1 SWG-272 Push Button Switch Assembly – Parts List and Exploded View

Index No Part No Description Size Qty

38-1 ........... SWG272-381 ............ Switch Bracket ......................................................... ...................................... 1

38-2 ........... SWG272-382 ............ Switch Box ............................................................... ...................................... 1

38-3 ........... SWG272-383 ............ Strain Relief ............................................................. ...................................... 2

38-4 ........... SWG272-384 ............ Power Cord .............................................................. 16AWG x 3C ................. 1

38-5 ........... SWG272-385 ............ Motor Cord ............................................................... 16AWG x 3C ................. 1

38-6 ........... TS-081C022 .............. Phillips Pan Head Machine Screw ........................... #10-24 x 3/8 .................. 2

38-7 ........... SWG272-387 ............ Push Button Switch ................................................. ...................................... 1

.................. JDC-500022-SC ........ Safety Key (not shown)............................................ ...................................... 1

38-8 ........... SWG272-388 ............ Pan Head Tapping Screw ........................................ M3 x 20 ......................... 4

12.4.1 SWG-272VS Square Wheel Belt Grinder – Exploded View

12.4.2 SWG-272VS Square Wheel Belt Grinder – Parts List