Cocraft HC85 Original Instructions Manual page 9

Use
Warning:
Never try to stop the grinding wheel with your hand even if you are wearing safety gloves.
Contact with a grinding wheel spinning at high speed can cause burns and scrapes.
1. Clean the chain thoroughly before sharpening, do not use a flammable solvent.
Allow the chain to dry before starting to sharpen it.
2. Lay the chain in the vice (9), lower the chain stop (8) against the back of the link and stretch
the chain backwards toward the chain stop, tighten the vice locking lever (10) so that
the chain is locked in place.
3. Lower the grinding wheel arm (4) and test if the setting is correct before starting the motor.
Remember to put your safety glasses on before starting the motor!
4. Push the green start button to start the motor and let it come up to speed.
5. Carefully lower the grinding wheel arm and test it on one of the links, carefully raise the arm
again, check the results, turn the motor off and adjust if necessary. If the settings are correct
you can continue sharpening. Bear in mind that best results are achieved if the contact
between the grinding wheel and the chain link occurs gradually and gently, do not grind
the same link for too long.
6. Fully elevate the grinding wheel arm, undo the vice locking lever (10) and move the chain
forwards to the next link (which is facing the same way) stretch the chain backwards against
the chain stop (8), tighten the vice locking lever (10).
7. Take your hand off the chain and continue sharpening.
8. Continue in the same way with all the cutting links that are facing the same way.
9. Undo the locking knob (2) on the bottom, turn the vice (9) and set the correct filing angle
for the rest of the cutting links that face the other way, tighten the locking knob (2) on
the bottom. Continue until the whole chain is sharpened. Remember to unplug the machine
after use.
10. Discard the chain if the cutting edge is ground down to under 3 mm.
Raker Clearance, Setting the Cutting Depth of the Chain
It is the relationship between the cutting edge of the link and the height of the raker that
determines how much material is removed by the chain. It is therefore very important that this
relationship is maintained for the life of the chain. The correct clearance is very important both for
safety and optimum stock removal.
If the chain has been grinded 2 to 4 times (depending upon how much material has been ground
away) the rakers might need to be filed down to maintain the same raker clearance (and depth of
cut). Use a flat file and a file guide/depth gauge to file the rakers.
min 3 mm (1/8")
9