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ROTARY LAWN MOWER BLADE TIP GEOMETRY

Cutting Tip Geometry - 

The tip cuts the most grass. To 

produce a proper tip three reliefs are neccessary.

NOT

ACCEPTABLE

Worn away bottom surface at the tip.  As 

shown, is a sign of poor blade mainte-

nance.  This blade tears the grass.

RELIEF 1 (TOP VIEW)

GENERALLY 2º - 5º

RELIEF 2 (END VIEW)

GENERALLY 60º

NOTE: The smaller the angle the stronger and 

longer lasting the cutting edge.  In sandy soils use 

80º, in heavy soils use 70º

RELIEF 3 (END VIEW)

OPTIMUM (generally difficult to produce)

Built in by manufacturer.

RELIEF 3 (END VIEW)

GENERALLY 0º

MAG-1000 Professional 

Blade Balancer

MAG-1000 Professional 

Blade Balancer

Summary of Contents for MAG-8000-7

Page 1: ...g you get the most out of your shop for the last 40 years OPERATING INSTRUCTIONS MAG 8000 7 Universal Lawn Mower Blade Sharpener Visit us at www magna matic com for more photos of products other helpful info ...

Page 2: ...re is the grounding wire 2 Extension Cords Use only three wire extension cords which have three prong grounding type plugs and three pole receptacles which accepts the tool s plug Replace or repair damaged cords THE SAFE WAY IS THE ONLY WAY TO GRIND 3 Keep Work Area Clean Cluttered areas and benches invite accidents 4 Consider Working Enviroment Don t use power tools in damp or wet locations Keep ...

Page 3: ...15 Guard Against Electrical Shock Prevent body contact with grounded surface For example pipes radiators etc 16 Stay Alert Watch what you are doing Use common sense Do not operate tool when you are tired or under the influence of any drugs or alcohol 17 Check Damaged Parts Before further use of the tool a guard or other part that is damaged should be carefully checked to determine that it will ope...

Page 4: ...ctrical outlet and plug in the grinder cord 8 Switch to ON and observe that the wheel rotation is clear and smooth minimum vibration 9 Switch to OFF and let the grinder run to a stop NOTE The MAG 8000 base has two open mounting holes for stationary mounting 5 16 bolt The grit guard exit port is designed to connect to your shop vac for a clean grinding environment Lawn mower blade knives have sharp...

Page 5: ...per the edge angle 4 To sharpen the blade place it on the work table of the grinder With your left hand provide the blade with a firm downward force to keep constant contact with the work table Also use your left hand to push the blade into the grinding wheel Then use your right hand to provide the back and forth motion to slide the blade against the grinding wheel if you are left handed just do t...

Page 6: ...es against the rounded work table You will need to compensate for the varying curves by allowing the blade to slightly come away from the grinding wheel and then back to it A lighter force with a little practice will produce an unparalleled professional and uniform appearance along the blade edge BLADE SERVICING HINTS The serviced blade must be 1 Clean use the MAG 12000 Blade Cleaner 2 In balance ...

Page 7: ...or and firmly tighten the wheel nut in a COUNTER CLOCKWISE direction with the spanner wrench provided Remember to remove the arbor spacer when changng from the 1 2 wide grinding wheel to the 1 wide grinding wheel 7 Check to result in a free wheel rotation Minimum vibration 8 Plug in and switch ON assure smooth rotation Minimum vibration Contact MAGNA MATIC CORP for alternative and replacement whee...

Page 8: ...one that has been dropped or become damaged DO NOT force a wheel onto the machine or alter the size of the mounting hole if wheel will not fit the machine get one that will DO NOT ever exceed maximum operating speed established for the wheel DO NOT use mounting flanges on which the bearing surfaces are not clean flat and free of burrs DO NOT tighten the mounting nut excessivly DO NOT grind on the ...

Page 9: ...blade mainte nance This blade tears the grass RELIEF 1 TOP VIEW GENERALLY 2º 5º RELIEF 2 END VIEW GENERALLY 60º NOTE The smaller the angle the stronger and longer lasting the cutting edge In sandy soils use 80º in heavy soils use 70º RELIEF 3 END VIEW OPTIMUM generally difficult to produce Built in by manufacturer RELIEF 3 END VIEW GENERALLY 0º MAG 1000 Professional Blade Balancer MAG 1000 Profess...

Page 10: ...ing wheel Rated at 5500 RPM 7 inch dia x 1 2 inch grinding wheel Rated at 5500 RPM Crank adjustment for grinding angle Unit Weight 75 Lbs MAG 8000 7 EURO standard 1 HP TEFC F Insulated Motor 2850 RPM motor 3470 RPM grinding wheel 220 volts Single Phase 50 Hz Greased sealed ball bearings 1 1 4 inch arbor left handed nut 7 inch dia x 1 inch grinding wheel Rated at 5500 RPM 7 inch dia x 1 2 inch grin...

Page 11: ...e remedy under this warranty shall be limited to such repair or replace ment In no event shall MAGNA MATIC be liable for any consequential or incidental damages This warranty does not apply to parts motor grinding wheel not manufactured by MAGNA MATIC or failing due to ordinary wear subjected to abuse accidental damage improper operations main tenance or repair or to other damage by circumstances ...

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