Jet J-4421-2, Operating Instructions And Parts Manual

Page 1: ...0 inch Disc Grinder Models J 4421 2 and J 4421 4 WALTER MEIER Manufacturing Inc 427 New Sanford Road LaVergne Tennessee 37086 Part No M 577010 Ph 800 274 6848 Revision B 09 2013 www waltermeier com Copyright 2013 Walter Meier Manufacturing Inc ...

Page 2: ...age prepaid to a location designated by us For the name of the location nearest you please call 1 800 274 6848 You must provide proof of initial purchase date and an explanation of the complaint must accompany the merchandise If our inspection discloses a defect we will repair or replace the product or refund the purchase price at our option We will return the repaired product or replacement at ou...

Page 3: ...g 7 6 2 To correct disc rotation 8 6 3 Changing service voltage 8 6 4 Replacing the LVP switch cut out coil 8 6 5 Changing motor connections 8 7 0 Operating Instructions 9 7 1 Applying a workpiece to the disc face 9 7 2 ON OFF Switch 10 7 3 Raising and lowering the table 10 7 4 Adjusting the table angle 10 7 5 Using the miter system 11 8 0 Recommended abrasives 11 9 0 Maintenance procedures 12 9 1...

Page 4: ... breakage of eye protection 2 Wear proper apparel No loose clothing or jewelry which can get caught in moving parts Contain long hair Rubber soled footwear is recommended for best footing 3 Do not overreach Failure to maintain proper working position can cause you to fall into the machine or cause your clothing to get caught pulling you into the machine 4 Keep guards in place and in proper working...

Page 5: ...jury from breakage of eye protection See Figure A below 3 Wear leather safety gloves arm guards leather aprons and safety shoes 4 A dust collection system is recommended Operator shall also wear a dust mask at all times See Figure B below 5 Additional precautions may be necessary for grinding materials which are flammable or have other hazardous properties You should always consult the manufacture...

Page 6: ...r controlled with a crank Table angle is shown on a protractor mechanism Table height with respect to the drive disc can be adjusted using a rack and pinion gear system controlled by a crank The table assembly is counterbalanced to make raising and lowering the table easier and to increase the service life of the lifting components Model number J 4421 2 J 4421 4 Stock numbers 577010 577011 prewire...

Page 7: ...table level While the machine has been run at the factory and checked before shipment you may want to check the table level before releasing the grinder for service 1 Disconnect the grinder from its electrical power source to prevent accidental start up if you have already connected it to power 2 Unlock the table tilt lock handle 3 Place a machinist s square against the table and disc face 4 Using...

Page 8: ...oil 1 Be certain the power in the service branch to the machine is disconnected and locked out 2 Open the switch case by removing the two cover screws 3 Locate the cut out coil which is under the switch See Figure 3 for position and removal installation motion Figure 3 Cut out coil removal and replacement 4 The cut out coil is a snap fit under the switch mechanism and is removed by pushing it to t...

Page 9: ...device which operates at high surface speeds Therefore you always want to support the workpiece while using the work table Freehand presentation of workpiece to the disc surface is risky to you to the workpiece and to bystanders It is not possible to overemphasize the need to keep the workpiece firmly on the table 4 The safest position at which to do any grinding is on the right hand side of the w...

Page 10: ...owering the table This is done as follows 1 Turn off the ON OFF switch and disconnect the machine from its electrical power source to prevent the possibility of accidental start up 2 Unlock the table lock handle 3 Turn the table height handle until the table is at a height appropriate to your workpiece size 4 Lock the table lock handle 5 Reconnect the machine to the electrical power source Note Ne...

Page 11: ...p on scrap material before attempting a finish machining task on the actual part you will be grinding Figure 11 Use of the miter system 8 0 Recommended abrasives By using different abrasive types and different weights of grit it is possible to produce a very wide variety of cutting speeds and surface finishes on a very wide range of materials from metals to plastics to wood The following informati...

Page 12: ... using the table raiser mechanism See sect 7 3 Raising and lowering the table 4 Tilt the disc guard to the rear to expose the top of the drive disc 5 Pull at the edge of the mounted grinding disc to pull it away from the drive disc then pull it completely off of the drive disc 6 Be certain the drive disc surface is clean If necessary use a cleaner which dries film free such as naptha to remove any...

Page 13: ...e front of the stand This is a combined effort The disc and hub can be separated from the motor shaft only if you perform these two operations at the same time 8 Slide the drive disc and hub off of the motor shaft To replace the drive disc 9 Remove the three bolts and washers which hold the disc to the hub 10 Position the new disc on the hub and secure it with the bolts and washers 11 Align the su...

Page 14: ... pick up the grit and cause increased wear to the machine and its parts Therefore the primary method of keeping the machine working surfaces in good order is KEEPING THE MACHINE AS CLEAN AS POSSIBLE Before using the tilt table or table raising mechanism the operator should use a stiff brush to remove excessive dust and grit from the tilt worm and sector and or table raising rack The single excepti...

Page 15: ...15 11 1 1 Motor and Trunnion Exploded View ...

Page 16: ...1 3 4 1 26 1 5644581A Hex Nut 5 16 2 27 5644591 Handle 1 28 5644611 Crank Wheel 1 29 5644621 Hex Socket Set Screw 5 16 18 x 3 4 6 30 J 5644631 Shaft Guide 1 31 5644641 Hex Cap Bolt 1 4 20 x 1 4 32 5644651 Lock Washer 1 4 6 33 5644661 Shaft 1 34 5644671 Special Washer 2 35 5644681 Spring Pin Ø4 x 20 mm 1 36 5644691 Worm Pinion 1 37 5644711 Worm Gear 1 38 5644721 Special Washer 1 39 5644731 Flat Was...

Page 17: ...1 LH Guard Arm 1 91 J 5645341 RH Guard Arm 1 92 5645351 Hex Cap Bolt 1 4 20 5 8 4 93 5645361 Lock Washer 1 4 4 94 J 5645371 Bracket 2 95 5645381 Hex Cap Bolt 1 4 20 x 1 2 96 5645391 Flat Washer 1 4 4 97 5645411 Hex Cap Bolt 1 4 20 x 1 1 2 2 99 5645431 Hex Nut 1 4 2 100 5645441 Hex Cap Bolt 1 4 20 x 1 2 101 J 5645451 Magnetic Switch Arm 1 102 5645461 Hex Cap Bolt 1 4 20 x 1 2 103 5645471 LVP Switch...

Page 18: ...Roll Pin Ø3 x 6 mm 1 119 7 5646005 Stop Link 1 119 8 TS 0267021 Socket Set Screw 1 4 20 x 1 4 1 119 9 5646006 Guide Bar 1 119 10 5646007 Flat Head Screw 1 4 20 x 5 16 1 119 11 5646008 Guide Disc 1 Note When ordering parts please use your grinder serial number as a reference number ...

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Page 20: ...20 WALTER MEIER Manufacturing Inc 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com www waltermeier com ...