Atrump A1-3T, Operation Manual, Page: 36 / 37

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12 QUILL LOCK
This is a friction lock to be used when quill is in stationary position such as for milling. It is recommended this
lock be used whenever quill movement is not desired.
13 QUILL FEED HANDLE
May be removed by simply pulling handle off. It is recommended that handle be disengaged when using
power feed.
14 QUILL STOP KNOB
It used to disengage power feed in either direction as well as acting as depth stop when working to a given
depth.
15 HI-NEUTRAL-LO LEVER
The lever is used to put the head into either direct driver or backgear. Rotate the spindle by hand to facilitate
meshing of clutch or gears.
Neutral can be obtained at mid-way position, and is provided to permit free spindle rotation for indicating
and set-up.
After an extended period of use, the neutral position may cause noise by allowing the clutch teeth to rub each
other. This can be corrected by loosening get screw, and reversing the position of the detent plate.
16 SPEED CHANCH HAND WHEEL
DO NOT attempt to change spindle RPM unless the motor is running. Dial speeds will only be approximate.
Belt wear will cause a slight variation in speeds from what is indicated on the dial.
When tightening or loosening the drawbar, it is necessary to lock the spindle. To do this, use the spindle brake
(3) which is located on the left side of the belt housing, turning it either right or left until it binds. Make sure
the quill is raised all the way.
Drawber has 7/16-20 right hand thresd and should be tightened with normal pressure using wrench furnished
with machine. To loosen collet, back of drawbar and if collet does not open, given top of drawbar a slight tap.
Spindle has non-sticking taper and collet should release readily.