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For technical questions, please call 1-800-444-3353.

SKU 90287 

        

sharpening troubleshooting:

8. 

If the tip of the bit is turning blue, it is 

a. 

overheating. Reduce the amount of 

pressure and sharpening time. Cool bit 

in water between sharpening.
If one edge is longer than the other, 

b. 

and the point is not centered, sharpen 

the shorter side for a little less time. To 

prevent this from happening, sharpen 

both sides the same amount of time, 

using the same amount of pressure.
If you are sharpening a broken (rather 

c. 

than a dull bit) and the time required to 

get a sufficient edge is too long, rough 

the bit into shape first using a bench 

grinder.

cautiOn

9. 

: Do not touch the end of the 

bit after it is sharpened.  The bit will 

become hot!
Repeat the above steps to the other side 

10. 

of the bit. Sharpen both sides the same 

amount of time, using the same amount 

of pressure.
Repeat the above steps as necessary to 

11. 

sharpen bit.

adjusting the grinding Wheel

Turn the ADJUSTING KNOB (1) to the 

1. 

right to raise the wheel. This will give you 

an aggressive cutting action. This is also 

useful when you are working with short 

bits.

Lower the wheel by turning the KNOB to 

2. 

the left. This is desirable when you wish 

a finer ground edge, though it will take 

longer and require more repetitions.

Summary of Contents for 90287

Page 1: ...eserved No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools Diagrams within this manual may not be drawn proportionally Due to continuing improvements actual product may differ slightly from the product described herein Tools required for assembly and service may not be included For technical q...

Page 2: ...minor or moderate injury NOTICE is used to address practices not related to personal injury CAUTION without the safety alert symbol is used to address practices not related to personal injury General Power Tool Safety Warnings WARNING Read all safety warnings and instructions Failure to follow the warnings and instructions may result in electric shock fire and or serious injury Save all warnings a...

Page 3: ...entional starting c Ensure the switch is in the off position before connecting to power source and or battery pack picking up or carrying the tool Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents Remove any adjusting key or wrench d before turning the power tool on A wrench or a key left attached to a rotating part of the power...

Page 4: ...come hot Handle with care allow tips to cool before storing Sharpening head may become hot 2 while using This is a normal result of operation Maintain labels and nameplates on 3 the tool These carry important safety information If unreadable or missing contact Harbor Freight Tools for a replacement Avoid unintentional starting Prepare to 4 begin work before turning on the tool Do not leave the too...

Page 5: ...eceding illustration See Outlets for 2 Prong Plug Extension Cords Grounded 1 tools require a three wire extension cord Double Insulated tools can use either a two or three wire extension cord As the distance from the supply outlet 2 increases you must use a heavier gauge extension cord Using extension cords with inadequately sized wire causes a serious drop in voltage resulting in loss of power an...

Page 6: ...14 12 10 12 1 16 0 14 12 10 16 1 20 0 12 10 TABLE A Based on limiting the line voltage drop to five volts at 150 of the rated amperes Symbology Double Insulated Canadian Standards Association Underwriters Laboratories Inc V Volts Alternating Current A Amperes n0 xxxx min No Load Revolutions per Minute RPM SPECIFICATIONS Required Power 120 V 60 Hz 70 W Speed 1 600 RPM Capacity 9 64 to 25 64 3 6 10 ...

Page 7: ...dure Place sharpener on a flat sturdy surface 1 and plug in Select a clean bit to be sharpened and 2 match its size with one of the holes in the head Figure 2 Putting Bits into Sharpener Twist until locked in place 3 Put the bit into the appropriate hole and twist until it locks into place See Figure 2 Figure 3 Tilt the Bit Tilt out slightly 4 Lean the bit towards the number on the outside of the ...

Page 8: ...e time required to get a sufficient edge is too long rough the bit into shape first using a bench grinder CAUTION 9 Do not touch the end of the bit after it is sharpened The bit will become hot Repeat the above steps to the other side 10 of the bit Sharpen both sides the same amount of time using the same amount of pressure Repeat the above steps as necessary to 11 sharpen bit Adjusting the Grindi...

Page 9: ...ew WHEEL 6 onto WHEEL 8 BASE 7 replace WASHER 5 and screw CYLINDER 4 back in Replace Wheel Assembly onto unit 9 Make sure that the inner flats of the ADJUSTMENT CYLINDER 4 match the outer flats of the DRIVE SPINDLE 11 Replace the DRILL 10 Index and SCREWS 3 Cleaning Keep the surface of your unit free of grit 1 dirt and grease Use soapy water or non toxic solvents Do not use petroleum based solvent...

Page 10: ... Spindle 1 5 Washer 1 6 Grinding Wheel 1 7 Wheel Base 1 8 Spring 1 9 Transmission Shaft 1 10 Dust Cover 1 11 Bearing 1 12 Drill Index Holder 1 13 Motor Housing Upper 1 14 Motor 1 15 Voltage Regulator 1 16 Switch 1 17 Motor Housing Lower 1 18 Cord 1 19 Round Screw 2 20 Cord Clamp 1 21 Screw 3 22 Bolt 1 23 Screw 2 24 Washer 2 25 Spindle Adaptor 1 REV 09j ...

Page 11: ...Page 11 For technical questions please call 1 800 444 3353 SKU 90287 Assembly Diagram 1 2 3 4 5 6 7 8 10 11 12 9 22 23 24 25 13 21 14 15 16 17 18 19 20 3 REV 09j ...

Page 12: ...ental or consequential damages so the above limitation of exclusion may not apply to you This warranty is expressly in lieu of all other warranties express or implied including the warranties of merchantability and fitness To take advantage of this warranty the product or part must be returned to us with transportation charges prepaid Proof of purchase date and an explanation of the complaint must...

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