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Storage  

Avoid  storing  the  die  grinder  in  very  humid 
locations  which  promotes  rusting  of  internal 
mechanisms.  Always  oil  the  tool  and  disconnect 
air hose before storage. 

Air system requirements 

1. 

Use  proper  air  hose  size  (refer  to  tool 
specifications). The hose should be just long 
enough to serve the working area. Excessive 
hose length will cause pressure drop.  

2. 

Make  sure  air  compressor  supplies  clean, 
dry air at correct CFM for the tool. 

3. 

Set air pressure to 90 psi.  

 

Excess  air  pressure 

and/or unclean air will shorten the tool’s 
life and may create a hazardous situation. 

4. 

Drain water from air compressor tank daily, 
as  well  as  any  condensation  from  air  lines. 
Water in the air line may enter the tool and 
cause damage. 

5. 

Change filters on the air system on a regular 
basis. 

6. 

Air-line  pressure  may  be  increased 
accordingly to compensate for extra-long air 
hoses (usually over 25 feet). Inside diameter 
of hose should be minimum 3/8-inch. 

General Air Tool 
Information 

If  the  air  tool  is  not  performing  according  to 
specifications, the following are among the most 
common  causes.  (See  also  “Troubleshooting” 
section.) 

 

Contaminated air such as a dirty air system 
or water in the system. 

 

Using wrong size tool for the job. 

 

Poor maintenance practices, such as using 
excessive air pressure or air volume. 

 

Improper or no lubrication. 

Rule of Thumb 

If it takes more than 8 seconds to tighten or loosen 
a  bolt  or  nut  with  an  air  impact  wrench  at 
maximum  setting,  the  air  wrench  is  too  small  or 
the  air  compressor  CFM  is  not  powerful  enough 
for  the  job.  Continued  use  in  either  capacity  will 
cause damage to the tool.  

Tool Pressure 

JET  Air  Tools  operate  on  70-to-100  psi  (pounds 
per square inch) air pressure measured at the tool 
when  the  tool  is  operating.  Set  tool  to  90  psi 
unless indicated otherwise. Pressure in excess of 
100 psi will shorten the life of the tool. 

Air System Recommendations 

Equip  the  air  compressor  intake  with  a 
replaceable air filter that can be easily cleaned. 

Use  safety  shut-off  valves  so  air  flow  can  be 
stopped quickly in case of a line break. 

When using multiple hoses, air hoses should be 
larger  than  leader  hose.  Join  multiple  hoses 
directly,  rather  than  with  quick  connect  fittings 
which may cause pressure drops and tool power 
reduction. 

Use  anti-whip  devices  across  hose  couplings  to 
prevent hose from whipping in the event of a hose 
failure or coupling disconnect. 

Always use moisture traps at the compressor for 
the main distribution line. Use moisture traps and 
in-line oilers on each downline that is to be used 
for air tools. (See Figure 2). Place oiler as close to 
air tool as possible for best lubrication. 

Lubrication 

Use a light oil containing rust inhibitors, such as 
SAE  #10.  Many  JET  air  tools  have  integral  oil 
reservoirs, which should be kept filled when in-line 
oilers are not used. 

If greasing is required, use a grease that is highly 
water resistant for front case components on air 
impact wrenches, grinders and sanders. 

Recycling 

Protect  the  environment.  Your  tool  contains 
materials  which  can  be  recovered  or  recycled. 
When its useful life has expired, please leave tool 
at a specialized facility. 

 

Summary of Contents for JAT-412

Page 1: ...Pneumatic Angled Die Grinder 505412 JAT 412 Operation Manual M 505412 Edition 1 05 2019 JET 427 New Sanford Road LaVergne TN 37086 Ph 800 274 6848 www jettools com Copyright 2019 JET...

Page 2: ...curing the tooling in the retainer and placing the tip against the work surface 11 Do not operate air tool without its guards in place Do not modify the tool 12 Do not operate this tool while tired or...

Page 3: ...of tool attachment must equal or exceed rated free speed of die grinder 36 Make sure attachment is securely inserted into collet and collet nut is tight 37 Make sure workpiece is secure and will not s...

Page 4: ...ncompass all possible workplace environments The operator is expected to take appropriate precautions and exercise common sense As with any tool operation safety of operator and bystanders should be f...

Page 5: ...l Length 6 69 in 170 mm Housing material Composite Net weight 1 70 lb 0 77 kg Shipping weight 1 92 lb 0 87 kg 1 The specified values are emission levels and are not necessarily to be seen as safe oper...

Page 6: ...install any quick change couplings farther down the line 5 Select speed with air regulator dial 6 Grip tool with both hands and push safety lever forward to release throttle lever Gently press throttl...

Page 7: ...ench is too small or the air compressor CFM is not powerful enough for the job Continued use in either capacity will cause damage to the tool Tool Pressure JET Air Tools operate on 70 to 100 psi pound...

Page 8: ...8 JAT 412 Angled Die Grinder Figure 2 Recommended arrangement of air piping and air line system...

Page 9: ...according to instructions in this manual Bearings worn Disassemble and inspect bearing Grease or replace as needed Loss of power erratic action Low air pressure Verify compressor has proper CFM ratin...

Page 10: ...horized 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 Locator on the JET website More Inf...

Page 11: ...JET 11...

Page 12: ...12 JAT 405 406 Angled Die Grinders 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com...

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