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JAT-434 Pneumatic Angle Grinder

 

 

 

 

IMPORTANT SAFETY INSTRUCTIONS 

General air tool warnings 

1. 

Read  and  understand  this  entire  manual 
before attempting assembly or operation. 

2. 

Read and understand all warnings posted on 
the tool and in this manual. Failure to comply 
with all of these warnings may cause serious 
injury. 

3. 

Replace  warning  labels  if  they  become 
obscured or removed. 

4. 

Do not use this tool for other than its intended 
use. If used for other purposes, JET disclaims 
any  real  or  implied  warranty  and  holds  itself 
harmless from any injury that may result from 
that use. 

5. 

Always wear approved safety glasses or face 
shield  while  using  this  tool.  (Everyday 
eyeglasses only have impact resistant lenses; 
they are 

not 

safety glasses.) 

6. 

Wear  ear  protectors  (plugs  or  muffs)  if  the 
noise exceeds safe levels. 

7. 

Wear  gloves  and  protective  clothing  if 
operation produces sparks or flying particles. 
Gloves  should  be  tight-fitting,  without  frayed 
fingers  or  hanging  threads.  Keep  hands  and 
body away from the working area of tool. 

8. 

Do  not  operate  an  air  tool  continually  at  full 
throttle without a work load on the tool. 

9. 

The air tool must be properly lubricated before 
operating.  

10.  Never start a percussion type air tool (chipper, 

breaker,  buster,  etc.)  without  securing  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  under 

the  influence  of  drugs,  alcohol,  or  any 
medication. 

13.  Adopt  a  comfortable  posture  with  proper 

balance,  and  maintain  secure  footing  at  all 
times.  Non-slip  footwear  or  anti-skid  floor 
strips are recommended. 

14.  Do not wear loose clothing or jewelry. Confine 

long hair. 

15.  Excessive  air  pressure  and  too  much  free 

rotation may decrease life of the tool and may 
cause a hazardous situation. 

16.  Check  air  hoses  for  wear,  and  keep  them 

away  from  heat  and  sharp  edges.  Repair  or 
replace  damaged  air  hose  immediately.  Do 
not carry tool by the air hose. 

17.  Air  hose  may  cause  tripping  hazards;  keep 

hose away from traffic areas. 

18.  Do not use this tool near flammable objects, 

or  in  potentially  explosive  environments.  Do 
not use near live electrical wires. 

19.  Do  not  use  power  tools  in  damp  or  wet 

location,  or  expose  them  to  rain.  Keep  work 
area well lighted. 

20.  Do  not  leave  a  connected  tool  unattended. 

When  not  in  use,  disconnect  tool  from  air 
source. 

21.  Shut off air supply and discharge any residual 

pressure  from  tool  before  removing  hose, 
making  adjustments,  changing  accessories, 
or storing tool. 

22.  Make sure tool is switched off, and your finger 

off the trigger, before connecting to air supply. 

23.  Remove adjusting keys and wrenches before 

turning on tool. 

 

Summary of Contents for 505434

Page 1: ...Pneumatic 4 Angle Grinder 505434 JAT 434 Operation Parts Manual M 505434 Edition 1 05 2019 JET 427 New Sanford Road LaVergne TN 37086 Ph 800 274 6848 www jettools com Copyright 2019 JET ...

Page 2: ...t securing 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 under the influence of drugs alcohol or any medication 13 Adopt a comfortable posture with proper balance and maintain secure footing at all times Non slip footwear or anti skid floor strips are ...

Page 3: ...tive wheel If using a wire brush inspect for loose wires 36 Do not get oil or water on the grinding wheel 37 When operating grinder place grinding wheel against work surface immediately after starting 38 Use proper size grinding wheel that matches the tool s specifications Do not use unapproved flanges bushings to adapt a grinding wheel to the arbor 39 The grinding wheel RPM rating must be the sam...

Page 4: ...ual may not encompass 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 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 Record the serial number and purchase i...

Page 5: ...wer 1 93 dB A Sound pressure 1 82 dB A Speed settings Variable throttle lever Overall length 8 8 in 223 5mm Housing material Aluminum Net weight 4 lb 1 81 kg Shipping weight 4 96 lb 2 25 kg 1 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 ...

Page 6: ...p from air inlet Figure 1 If an in line oiler is not being used add 4 or 5 drops of air tool oil not included into the air inlet Figure 2 5 Blow out air line to remove any dirt or moisture then connect air supply hose to tool Set air pressure to 90 psi IMPORTANT Connecting a quick change coupling directly to the tool is not recommended as vibration may cause the connection to fail Instead add a le...

Page 7: ...tions 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 ...

Page 8: ...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 3 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...

Page 9: ...perly 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 rating for tool Check compressor regulator setting set air pressure to 90 psi Check for loose connections at air inlet o rings etc Moisture or obstruction in air hose Air supply must be clean and dry ...

Page 10: ...T Please have the stock number and serial number of your tool available when you call so that we may serve you quickly and accurately 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 505434 JAT 434 4 inch Angle Grinder exploded view ...

Page 11: ...ff Key 3x13 mm 1 35 SM 61935 Gasket 1 36 SM 61936 Retainer 1 37 SM 61937 Disc Cover 4in 1 38 JAT450 38 Flange 3 8 24UNF 1 Part No Description Qty 40 JAT450 40 Flange Nut 3 8 24UNF 1 41 JAT450 41 Adjust Screw 1 42 JAT450 42 Adjust Nut 1 43 TS 1502041 Socket Hd Cap Screw M5x16L 4 44 TS 2361051 Spring Washer 5 mm 4 45 JAT450 45 Spring 1 46 JAT450 46 Governor 1 47 JAT450 47 Pendulum 6 48 40317 13 Spri...

Page 12: ...thorized 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 Information JET is constantly adding new products For complete up to date product information check with your local distributor or visit the JET website How State Law Applies This warranty gives you spe...

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