Changing Speeds; Qui Ll Return Spring Adjustment - Powermatic Better By Design 1150-A Maintenance Instructions And Parts List

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b. Raise drill press table and lock in position (Fig. 1). Place motor on table in upright position and attach
motor to motor mount, using (4)
5/16-18
hex nuts.
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c. Place variable speed motor pulley on motor shaft (spring up); open pulley by placing variable speed belt
between halves and pulling outward on belt. I nsert key in keyway, then tighten screws in the bottom
side of the pu lIey flange.
d. Before replacing guard - temporarily replace variable speed control hub (Fig. 4). Turn machine on. The
belt shou Id be in a horizontal plane. I f belt is cocked at an angle, shut off the motor, loosen motor
pulley and move on shaft until belt is level. Secure setscrew. (See section on changing speeds for setting
speed range.)
e. Remove handle - - replace guard, then control hub. Machine is now ready for operation.
NOTE: The above operations are easier to perform with head raised to its maximum height (flush with
top of column) since it is easier to remove the belt guard with this position.
CHANGING SPEEDS:
Speed changes on step pulley models are to be made with the machine not running· . loosen motor base
clamp (F ig. 2) and pu II handle toward operator. Belt is now free to move to any of the 5 speeds available.
When speed choice is made, move handle to rear for proper tension and lock the motor base.
Speed changes on variable speed models are to be made ONLY WHILE MACHINE IS RUNNING. Damage
to variable drive mechanism will result if speed is adjusted while machine is not running.
If spindle speed does not appear to match the dial speed on variable speed unit - - check speed with a tach­
ometer and adjust by unlocking the setscrews in the upper sheave half and turning the top nut on the spline
drive (see Fig. 4) clockwise to decrease speed and counterclockwise to increase speed.
To set speeds, adjust cam to minimum RPM, adjust by means of nut on the spline driver to flush belt with
outside diameter of spindle sheave. Move motor back until belt has minimum of play. Pull out on one side
of the belt. If there is a minimum of slack, the motor and belt system are properly adjusted in this position.
The upper sheave on the spline driver has two setscrews which must be unlocked for the sheave to be moved.
A fter adjustment lock the setscrews bring the lock nut down against the hub of the upper sheave and bend
a tab of the lockwasher into the nut to lock its position.
INSTALLI NG CHUCK:
a. Wipe off the No. 33 spindle taper and tapered socket in chuck body (Fig. 5) with a clean cloth. Make
sure no foreign particles are left on these surfaces which cou Id prevent proper seating of the two parts.
b. Apply a light film of oil on the spindle taper and place chuck on end of spindle (F ig. 5). Screw chuck
collar on to the threads at end of spindle. Hold spindle pulley with one hand to keep spindle from
rotating and tighten the chuck collar with drill chuck key.
c. When removal of the chuck is required - - disconnect power source. Hold top spindle pulley with one
hand and using chuck key handle, loosen chuck collar by turning counter - clockwise (Fig. 5). Con­
tinued rotation of the collar will force the chuck off tapered spindle. NEVER attempt to drive or wedge
chuck off as damage could result to chuck, spindle nose and spindle bearings.
QUI LL ADJUSTMENT:
Lateral play or bellmouthing can develop between the quill and head casting bands due to wear. To com·
pensate for wear between the qu ill and head, proceed as follows:
a. Be sure quill lock handle (Fig. 6) is loose.
b. Squeeze slotted head casting together slightly by tightening bolt (A). Apply just enough pressure to
compensate for wear but do not restrict free motion down or return.
QUI LL RETURN SPRING ADJUSTMENT:
Spring tension for return of spindle, after hole drilling, has been pre-set at the factory. No further adjust­
ment should be attempted unless absolutely necessary. Adjustment will probably be required if a multiple
spindle drilling or tapping head is used. If adjustment is necessary, loosen lockscrew (A) (Fig. 7) while hold­
ing quill spring housing (B), DO NOT allow the housing to turn in your hand, or spring will unwind. Turn
entire housing assembly clockwise the number of turns necessary to cause the quill to return to its up
position. (NOTE: The flat of the spring housing pilot is lined up with the spring loading hole on the body
aof the spring housing.) Reset lockscrew (A), make sure point of screw mates to flat on the housing journal.