TM 9-4910-579-14&P
THE LEVER ON THE HANDWHEEL SIDE OF THE MACHINE IS THE GEAR SHIFT. Maximum downward feed and
spindle R. P. M. are obtained with the lever in the raised position, slow feed and R. P. M. are obtained with the lever in
the lower position. The gear shift is in neutral or disengaged with the lever in the center position.
THE LEVER ON THE SIDE OF THE MACHINE OPPOSITE THE HANDWHEEL IS THE FEED CONTROL. When moved
to the back position, it arranges the machine to feed downward. When moved to its forward position, it arranges the
machine to retract or raise the sleeve. In center or neutral position, the feed is disengaged. Lever cannot be pulled to
retraction position without depressing Retraction Release Plunger. See diagram on Page - 4 -
THE FEED SELECTOR KNOB IS LOCATED ON TOP OF MAIN BASE CASTING. See table of speeds and feeds on
THE TOGGLE LOCATED AT THE CENTER OF THE HANDWHEEL ENGAGES AND DISENGAGES THE AUTOMATIC
FEED. Raising the toggle disengages the clutch on the handwheel shaft and allows the operator to feed the machine by
hand for such operations as counterboring and chamfering. The machine can be hand cranked manually at any time
when .the feed lever is in neutral position.
To start downward feed, set the Feed Selector Knob UP for slow feed, DOWN for fast feed, move the feed control lever to
the back position and shift the gear shift lever either up for high speed or down for low speed. It will be necessary for the
handwheel to rotate the feed shaft for a partial turn before the feed selector key will drop into gear and start feeding.
If it is necessary to stop the boring held at any time before the tool has passed completely through the cylinder, extend the
toggle in the center of the handwheel to straight-out position. If it is then necessary to retract the sleeve, press the
Retraction Release Plunger and move the feed lever to the FORWARD position.
CAUTION
HANDWHEEL WILL SPIN ON AUTOMATIC RETRACTION.
When the tool has passed through the cylinder, the rotation of the spindle and the downward feed will stop, if the
automatic stop has been set. To raise the sleeve out of the cylinder, press the Retraction Release Plunger; lever will
return to neutral position when the sleeve reaches the upper end of travel.
HAND CRANKING - If at any time you desire to crank the machine manually, it is necessary that you have the feed lever
in the neutral position or the toggle in the center of the handwheel raised so it will disengage the clutch on the handwheel.
CHANGING SPEEDS - The machine can be shifted from high to low speed or vice versa at any time as long as the feed
lever is in the BACK or feed position. The gear shift lever cannot be moved unless the feed lever is in the BACK or feed
position. The feed selector knob cannot be reset unless feed lever is in NEUTRAL position or toggle, in center of
handwheel, is in extended or straight-out position.
IMPORTANT
DO NOT ATTEMPT TO BORE WITH MACHINE WITHOUT FIRST CHECKING THE MICROMETER SETTING BY
BORING IN A SCRAP CYLINDER. REFER TO INSTRUCTIONS ON SETTING AND ADJUSTING THE MICROMETER.
DO ALL TEST BORING ON A SCRAP BLOCK UNTIL YOU ARE SATISFIED WITH RESULTS OBTAINED.
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