Instruction Manual Section Five
2. Tilthead grinders: Instead of tilting the workhead, place the workhead
axis level with the table, and adjust it for the necessary chamfer angle.
Take chamfer clearance directly from the tilt of the Wheelhead by the
visual method, or from the corner clearance table on page 108.
C. Grinding Procedure:
1. The Wheelhead may have to be raised slightly to allow the rear portion of
the upper swivel table to clear under the bottom of the dovetail slide of
the Wheelhead. Adjust the wheel guard as necessary.
2. Proceed to sharpen the chamfer by the steps indicated in Part l-C. The
left side of the cup wheel will be used in the set-up shown, necessitating
a stop set on the table at the left side to limit maximum travel to the
right. In the set-up shown in Photo 36, the wheel will be operated in
a clockwise direction. Under some conditions, it may be advisable to ad-
vance the Crossfeed of the machine out to a point where the base of the
workhead can be placed more directly over the center of the swivel table
for maximum stability.
III. SHARPENING THE PERIPHERY OF THE CUTTER
(BLADES PARALLEL OR APPROXIMATELY PARALLEL TO THE CUTTER AXIS)
(SEE PHOTO 33)
A. Set-up Preparation:
1. Completion of the foregoing procedure for sharpening the faces and chamfer
clearance surfaces is assumed to be complete.
2. Move the base of the workhead in approximately 10 inches from the right
side of the swivel table. Place the axis of the workhead (and cutter)
at a 90 degree angle relative to the swivel table and lock. Return the
workhead to the level or 0 degree setting for the vertical swivel Turn the
swivel table to a 90 degree angle relative to the subtable and lock.
B. Toothrest and Clearance Angle Settings:
1. Place the toothrest base on the workhead or table top (depending on the
cutter size) and adjust the micrometer blade end to hold the cutter blade
from above the wheel, or from below if space permits and the cutter edges
are to face down at the wheel contact point. NOTE: Some face mills have
a marked helix angle of the peripheral edges relative to the cutter axis. In
this situation, the toothrest must be placed on the Wheelhead in a fixed
position over (OR UNDER) the wheel, and the cutter peripheral faces
traversed relative to this rest to obtain a uniform clearance land. The
grinding process is the same then as described in the chapter on stagger
tooth cutters. (Page 20 shows below center toothrest location.)
2. It may be necessary to work on the lower left (OR RIGHT) portion of
the grinding wheel in order to clear the wheel with the other cutter blades
or the toothrest mechanism, as shown in Photo 33. It is advisable to
keep heavy cutters well centered over the grinder subtable.
3. After placing the cutter blade face at the same height as the workhead
center, obtain the amount to raise (OR LOWER) the toothrest micrometer
from the clearance Table II, page 105, to give the desired clearance angle.
4. Note on Secondary Clearance Angles: If the cutter has this feature, follow
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