Instruction Manual
Section Four
Other arbors shown in Photo 8 are the standard internal grind-
ing arbors (B780J, B780K, and B780C) which are held in the left
end of the spindle by an inner taper lock and threaded end.
Tighten these arbors in place by using an open-end wrench while
holding the spindle shaft with a wrench at the right end. The
⅛ inch and ¼ inch threaded-shank mounted wheels screw into
the B780J and B780K arbors ⅛ inch and ¼ inch straight-shank
mounted wheels fit into the collet assembly of the B780C arbor.
Mount the straight-shank wheels as close as possible to the
collet face. The straight shank should be seated into the collet
at least ⅝ inch.
Heavy Duty for Universal Grinders with the B955HD Head: The
S6055CL heavy duty cartridge spindle (Photo 9) has an operating
speed range of 1,150 to 7750 R.P.M. Mount the belt pulleys as
shown in Photo 9 at the right side of the spindle. Mount the
pulley first, then the keyed wheel flange and nut Use the B628
wrench to tighten the nut while holding the pulley by hand or
holding the shaft stationary with the B936W spanner wrench.
The latter wrench holds either the collet itself (BY TWO REAR
FACE HOLES) or its locking left-hand nut. The 936P wheel
puller is used to extract wheel collets from the taper of the
spindle. Remove the locking nut, screw on the puller to the
collet, and then with the spindle held still, tighten the inner
thrust bolt with the spanner wrench end or other wrench.
Mount wheels to the B936CL wheel collets by first mounting the
collet to the spindle tapered shaft. Clean the tapered surfaces,
mount the collet, then the nut, and while holding the spindle
with an open-end wrench at the spindle's right end, tighten the
nut with the B936W wrench The body of the S894 wrench may
be used as a lever in the U-shaped end of the spanner wrench.
Once the collet body is locked to the spindle, remove the ring
nut, keyed washer, and wheel spacer. Clean these items. Re-
mount the wheels spacer which, when removed, allows for the
mounting of 8 inch by ¾ inch wide wheels. Mount the wheel,
the keyed washer, and the collet ring nut. Holding the spindle
at the right end, tighten the collet nut with the B936W spanner
wrench. See Part I of this section for safety precautions when
wheels are being mounted.
(e) Wheel Guards: For straight, cup, or saucer wheel grinding, with the
—15—
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