Instruction Manual
Section Five
as shown in Photo 64. Note that an index disc is used in conjunction
with a plain toothrest in order to facilitate accurate and "easy indexing
of the teeth.
2. If the saw is badly worn, if a tooth is broken off, or if it is in need of
gumming, grinding the face of each tooth and the gullet between that
tooth and back of the preceeding one is required. In many cases this will
prevent the necessity of grinding a heavy primary relief. Dress a straight
wheel, as shown, to a 60 degree angle (OR WHATEVER ANCLE EXISTS
BETWEEN A TOOTH FACE AND THE BACK OF THE PRECEEDING
TOOTH). Turn the Wheelhead axis 90 degrees to the table travel. Adjust
the saw gullet relative to the wheel using the machine Crossfeed and
elevation handwheels. Once the cutter is positioned relative to the wheel,
set the plain toothrest on the table and adjust the toothrest's micrometer
until its blade is firmly against a convenient index disc notch. Grind the
face and tooth back by table traverse action while periodically lowering
the Wheelhead.
NOTE:
Do not move the machine Crossfeed once the
cutter has been positioned relative to the V dressed wheel.
3. When the gumming process has been completed, remove the wheel and
place a cup wheel or straight wheel on the spindle. Use the toothrest and
the index disc or the saw teeth themselves for indexing in order to create
a primary land on the periphery of the saw. Be careful not to burn the
teeth ends (a Saucer Wheel may be helpful in this regard). Follow the
general procedures described in Chapter 5 for straight tooth side milling
cutters for grinding the primary and secondary clearance lands, as applied
to Photo 65. Saws used for gang slotting should be grouped together on
a straight arbor and gummed or sharpened as described above.
PHOTO 65 PHOTO 66
B. T-Slot, Woodruff Keyseat, and Keyway Cutters:
I. T-slot cutters are of the stagger tooth type with alternate left and right
helix. On their periphery, these cutters are sharpened in the same manner
as a stagger tooth cutter except that the shank is held in a universal work
head such as the B942. The sides of the teeth are sharpened in the same
manner as the face of an end mill or the sides of a side milling cutter A
saucer wheel may be necessary to reach the side teeth clearance lands
between the cutter and the end of the workhead spindle Consult Chapter
6 for details of the sharpening process.
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