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1.3

  Safety Requirements for 

Abrasive Sanding Machines 

Abrasive sanding can be hazardous to operators 
and bystanders. Sanding sparks, chips and dust 
particles thrown off by the sanding disc can cause 
serious injury by contact or inhalation. To avoid 
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. Use of eye wear which does not comply 
with ANSI Z87.1 specifications could result in 
severe injury from breakage of eye protection. 

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. 

4.  Additional precautions may be 

necessary for sanding materials which are 
flammable or have other hazardous properties. 
You should always consult the manufacturer of 
such materials for instructions on sanding and 
handling. 

5.  Do not force or jamb the workpiece into the 

sanding disc. 

6.  Before sanding, always allow the motor to come 

up to operating speed, then check the sanding 
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 sanding 
operations. 

7.  Abrasive discs 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 Farenheit. Failure 
to do so could cause premature disc failure. 

8.  Examine the face of the sanding disc carefully. 

Excessive sanding which wears down to the 
backing material can tearing of the disc. Never 
use a disc which shows backing, nicks or cuts 
on the surface or edge or damage due to 
creasing or poor handling. 

9.  When installing a new disc, be certain the disc 

is accurately centered on the drive wheel. 
Failure to do so could cause a serious 
unbalanced condition. 

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.  

12. Personal hearing protection such 

as ear plugs or ear muffs shall be 
used to protect against the effect 
of noise exposure. 

 

 

SAVE THESE INSTRUCTIONS 

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

  This means that if precautions 

are not heeded, it may result in minor injury and/or 
possible machine damage. 

  This means that if precautions 

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

 

 

WARNING:

 This product can expose you to 

chemicals including lead and cadmium which 
are known to the State of California to cause 
cancer and birth defects or other reproductive 
harm, and phthalates which are known to the 
State of California to cause 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 well-ventilated 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. 

Summary of Contents for J-4210

Page 1: ...Instructions and Parts Manual Belt and Disc Sanding Machine Model J 4210 JET 427 New Sanford Road LaVergne Tennessee 37086 Part No M 414550 Ph 800 274 6848 Revision C 10 2018 www jettools com Copyrig...

Page 2: ...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 th...

Page 3: ...ng or poor handling 9 When installing a new disc be certain the disc is accurately centered on the drive wheel Failure to do so could cause a serious unbalanced condition 10 Always present the workpie...

Page 4: ...usting belt tracking 8 9 2 Platen housing position 8 9 3 Adjusting sander tables 8 10 0 Operation 9 10 1 Miter gauge 9 10 2 Controls 9 11 0 User maintenance 9 11 1 Lubrication 9 11 2 Cleaning 9 11 3 R...

Page 5: ...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 attem...

Page 6: ...er slot 5 8 in 16 mm Disc sanding Disc speed 2100 RPM Abrasive disc size and grit 10 in 254 mm 80 Grit Disc table Cast iron 7 1 2 x 13 in 191 x 330 mm Disc table miter slot 5 8 in 16 mm Disc table til...

Page 7: ...ailure 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 wor...

Page 8: ...djustment 9 2 Platen housing position The sanding belt can be operated with the platen housing at horizontal vertical or any angle in between Change position of platen housing as follows Numbers in pa...

Page 9: ...t safety key and store key in a safe place Key must be reinserted to start machine 11 0 User maintenance Always disconnect power to machine before performing maintenance Failure to do this may result...

Page 10: ...to rod 74 Position table so it is level and tighten screw 65 against rod 74 11 Connect electrical power and operate machine to check operation 11 5 Replacing V belts 1 Disconnect electrical power 2 Re...

Page 11: ...he set screw 29 Install plate 55 and secure with four screws 56 Check for clearance between plate 55 and sanding disc 30 Install table 60 onto rod 74 Position table so it is level and tighten screw 65...

Page 12: ...belt tension inadequate Tighten sanding belt Excessive pressure being applied to platen housing Reduce pressure on sanding belt and platen housing Motor belt loose Tighten motor belt Disc stalls when...

Page 13: ...13 13 1 1 J 4210 Belt Disc Sander Exploded View...

Page 14: ...hown 300MFD 125VAC 1 26 5513035 Hex Screw 3 8 X 1 3 27 5513036 Flat Washer 3 8 3 28 5513037 Screw 3 8 X 1 1 2 1 29 5513038 Nut Jam 1 30 J 5513039G Mounting Bracket 1 31 5513040 Screw 5 16 X 1 1 32 551...

Page 15: ...Guard 1 76 5513094 Screw 3 16 X 5 8 1 77 5513095 Sanding Belt Cover not shown 1 77A 5513096 Cap Screw not shown 8 78 5512766 Switch Assembly 1 79 5051841 Abrasive Belt 6 x 48 80 Grit 1 5512764 Abrasi...

Page 16: ...16 13 2 1 J 4210 Stand Exploded View 13 2 2 J 4210 Stand Parts List Index No Part No Description Size Qty 1 J 5513476G Access Panel 1 2 5513477 Knob 2 3 414549 Complete Stand Assembly 1...

Page 17: ...17 14 0 Electrical Connections for J 4210...

Page 18: ...tional action needed JET has Authorized Service Centers located throughout the United States For the name of an Authorized Service Center in your area call 1 800 274 6846 or use the Service Center Loc...

Page 19: ...19 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com...

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