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Detailed instructions for use are in the User's Guide.
[. . . ] Avoid putting downward pressure on the chuck. Keep the pressure even, and directed into the tube. The correct sharpening action will naturally rock the chuck back and forth. A 1/4" bit will need about 6 complete rotations of the chuck, or 12-20 half rotations, to achieve a perfectly sharp point. [. . . ] It can be High-Speed Steel, Cobalt and Carbide. Split point drill bits can be sharpened many times with the 250 Handyman. However they work best when the split-point is present.
1. Size the chuck using the procedure in Step 1, Figure A and B). Press in the pusher button and insert the chucked drill bit into the alignment tube. Slowly release the pusher button allowing the clamp arms to grab the bit and pull it to the drill stop. Make certain that the flats on the chuck are engaged with the flats inside the alignment tube. Slide the chuck all the way into the alignment tube. Using the alignment viewer visually check that the drill bit is up against the drill stop. If it isn't push the drill bit up against the drill stop. Remember the clamp arms need to be in the narrowest width of the drill bit fluting. If they are not, turn the drill bit until they are and then tighten the chuck. NOTE: The chuck jaws should be aligned straight within the chuck. Look into the back of the chuck at the chucked small bit to check them. If they are not straight then slightly loosen the chuck knob until the jaws are straight. Sharpen the small bit with a light pressure and only two white-mark to white mark rotations.
Wear Eye Protection.
Never touch internal parts of the sharpner when the sharpener is on. The rotating diamond grinding wheel can cause injury.
Large Drill Bits. . .
1. Use the procedure in Steps 1, 2, and 3 to sharpen large drill bits. [. . . ] Using compressed air or a small brush remove all grinding particles from the chuck knob, pusher and jaws. Re-assemble carefully, making sure that all of the jaws are in their respective grooves.
Anatomy of a Drill Bit
LIP RELIEF
WEB THICKNESS FLUTE LENGTH HEEL CHISEL EDGE
Masonry Drill Bits. . .
1. Size the chuck using the procedure in Step 1, Figure A and B). Press the pusher button, and insert the chucked drill bit into the alignment tube. [. . . ]
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