background image

 7

 

Read and understand all 

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

 

7.0

  Setup and assembly 

It is recommended that the belt and disc sander be 
secured to the floor for safe operation. The machine 
stand has mounting holes in a flange on the inside 
of stand enclosure. The stand can be secured to the 
floor using these mounting holes. 

8.0

  Electrical connections 

The J-4210 Belt/Disc Sander is rated at 115/230V 
power, and is pre-wired for 115 volt.  

Before connecting to power source, be sure switch 
is in 

off 

position.  

It is recommended that the sander be connected to 
a dedicated 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. 

8.1

 Grounding Instructions 

1. All Grounded, Cord-connected Tools: 

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. 

 Check with a qualified 

electrician or service pe

r

sonnel 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 

3. 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 outlet can be installed by a 
qualified electrician. 

This adapter is not permitted in 

Canada.

 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. 

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 

3. The tool has 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 3 

4. Permanently connected tools: 

This tool should be connected to a grounded metal 
permanent wiring system; or to a system having an 
equipment-grounding conductor. 

5. Polarized plugs

 – To reduce the risk of electric 

shock, this equipment has a polarized plug (one 
blade is wider than the other). This plug will fit in a 
polarized outlet only one way. If the plug does not fit 
fully in the outlet, reverse the plug. If it still does not 
fit, contact a qualified electrician to install the proper 
outlet. Do not change the plug in any way. 

 

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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