background image

 8

8.2

  Voltage conversion 

Disconnect machine from power source. 

To switch the incoming power leads for 230 volt 
operation, follow wiring diagram on inside cover of 
motor junction box. A similar diagram is found in 

sect. 14.0

 of this manual. (Note: In case of 

discrepancy, diagram on machine takes 
precedence.) 

If using an electrical plug, the plug on the end of the 
motor cord must be replaced with a UL/CSA listed 
plug rated for 240V power. 

9.0

  Adjustments 

9.1

  Adjusting belt tracking 

The tracking of the sanding belt may require 
adjustment after changing the belt. The belt housing 
has a tracking adjustment mechanism for this 
purpose (Figure 4). 

1.  Start the machine. 

2.  Check tracking of sanding belt; the belt should 

track at center of drums. 

3.  Adjust belt tracking by turning the adjustment 

knob as needed. Do this in small increments 
and allow belt to respond to the changes. 

 

Figure 4:  belt tracking adjustment 

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 parentheses correspond to 
index numbers in parts list, 

sect. 13.1.1

1. Disconnect 

electrical 

power. 

2.  Remove four screws (52) and pulley cover (12). 

3.  Using an open end wrench, loosen two hex 

screws (13) (also refer to Figure 5). 

4.  Move platen housing to desired position. When 

platen housing is to be placed in horizontal 
position, lower platen housing onto stop screw 
(28) on machine base. 

5.  If the stop requires adjustment, loosen jam nut 

(29), adjust stop screw (28) to desired position, 
and tighten nut (29). 

6.  Tighten two hex screws (13). 

7.  Install pulley cover (12) and secure with four 

screws (52). 

8.  Start the machine to check operation. 

 

Figure 5:  platen housing clamping screws 

9.3

  Adjusting sander tables 

9.3.1

  Disc table 

1.  To change the disc table angle, loosen 

clamping knob on left side of table (refer to 
Figure 6). 

2.  Move table to desired angle. 

3.  Tighten clamping knob to secure table. 

 

Figure 6:  sander table angle 

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...

Reviews: