Instruction Manual
Section Four
stationary bar which keeps the nut from moving and the nut itself. This latter
screw has been factory adjusted for very minimal movement of the nut relative
to the bar. Normal backlash in the nut is about .005 inch.
C. Column Elevation:
1. All B300, B360, BA900, BA960, BA962, B2000, B2060, and B2062 series
grinders: The elevation handwheel, located at (23) Photo 5 and on some
machines also at the center of the machine base just below the column,
has an index disc calibrated in thousandths — f i f t y to a revolution. B300
and B350 series grinders have the index dial integral with the handwheel.
The index disc and releasing thumb-nut are the same as on the Crossfeed
handwheel. These machines with a 4 inch column have a column lock
lever at the rear of the machine (7) Photos 6 and 7 which is used to lock
the column in at a fixed location for cylindrical grinding and on operations
where vertical movement of the column is critical During surface grind-
ing activity, use the column lock under partial tension before downfeeding
onto the work.
2. B6060 and B6062 series grinders: The elevation handwheel are located at
(22) Photo 4 and have index discs that are calibrated in thousandths-—fifty
to a revolution. The index disc and releasing thumb-nut are the same as
on the Crossfeed handwheel. These machines are provided with a rear
column lock screw at (10) Photo 4 for operations that require a fixed
column setting.
D. Grinding Heads:
1.
TOOL AND CUTTER GRINDERS:
Models B300, BA900, and B2000 have
a motorized dual-wheel grinding spindle and motor saddle (5) Photo 7
attached directly to the top of the column. This entire assembly is held
in place by an eccentric pin at (6) Photo 7 which passes through the
column wall, through the hold-down cage attached to the motor saddle,
and then into the inner wall of the column. When this shaft and hand
wheel are rotated in either direction sufficiently, the grinding head assem
bly is held rigidly in place. If only a slight amount of shaft rotation is used,
the head can be swivelled in the horizontal plane 360 degrees. The column
top is calibrated in degrees and the motor spindle shaft may be positioned
to any angle relative to the table and locked in place. Holes in the pin
handwheel are provided for use with the handle of the B628 wrench for
additional tightening of the grinding head to the column.
Wheel guards shown in Photo 7, are mounted to bracket arm A609A (4.)
or the B945CB bracket (1) (FASTENED TO THE MOTOR HUBS) by
means of a wheel guard assembly. Use the B855W open-end wrench,
standard T-slot bolts, and the S894 wrench to tighten the hex socket
screws and hex nuts.
2.
UNIVERSAL GRINDERS:
Models B360, BA960. BA962, B2060, and B2062.
These models use a universal grinding head
(B955 or B955HD)
which
features a motor-driven grinding spindle using a V-belt.
(a) Spindle Speeds: The R.P.M. is changed by changing the pulleys
attached to the spindle and motor. Always use the keyed washers on
the outside of the pulley before turning on the locking nut. Remove
the belt guard by removing the nut (3) Photo 6 from the T-slot bolt
held in the A609A T-slot arm bracket. This bracket slips over the
motor hub and is adjustable by a locking hex socket screw, A belt
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