Instruction Manual
Section Five
stated on the cutter, place the cutter between the tailstocks and align the face of
the wheel with the axial rake of the tooth face during step C.
NOTE: CUTTERS WITH A LONG AXIAL RAKE (HELIX):
Most hobs have some
axial helix. Photo shows the set-up when it is necessary to slide the formed cutters
along a fixed toothrest. The B1070 spiral grinding fixture is the ideal way to grind
these cutters on a K. O. Lee grinder as shown in photo. Cutters are traversed in
the same manner as other spiral milling cutters. Work from left to right (and then
back) for the initial traverse by the wheel. Set the wide rest blade to precede the
wheel cutting edge somewhat as this will allow the cutter tooth face to cam on the
blade prior to striking the wheel Use the micrometer of B1070 to advance the
hob teeth into the wheel.
In order for the wheel to contact the spiral tooth on
a tangent line only, it is necessary to use the angular side of the saucer wheel. Place
the angular face toward the front of the machine so that its bottom peripheral edge
is in line with the centerline of the tailstocks. The alignment of this face is facili
tated by tilting the Wheelhead (when possible) to place this bevelled side of the
saucer wheel in the vertical plane.
See more B1070 information on page 53.
III. GRINDING A FORMED CUTTER WITH RADIAL RAKE
A. Repeat all steps in part I, except C which should be modified as follows:
1. Before attempting to move the machine Crossfeed from its position which
leaves the tailstock centers in alignment with that of the wheel face,
check the cutter side to see if it is stamped with the amount of "off-set"
in the horizontal plane which will create the desired rake. Move the
Crossfeed in (POSITIVE "UNDERCUT" RAKE) the required number of
thousandths of an inch. Now reset the machine Crossfeed dial to zero
to be able to return to this correct rake setting.
2. If the cutter is not stamped with the amount of horizontal off-set from
•NOTE: on B360, BA960. B2060 Series, it is easier to mount toothrest if B955PC Dovetail Clamp is used.
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