TM 9-4910-638-14&P
READ COMPLETELY BEFORE ATTEMPTING TO OPERATE MACHINE
Speed Control
Motor Shift
Boring
Travel Inches/Min.
Lever
Lever
head
Feed Plunger Position
Position
Position
R.P.M.
1
2
3
4
Up
Down
83
.127
.249
.393
.564
Up
Up
142
.217
.426
.670
.966
Down
Down
297
.455
.891
1.400 2.000
Down
Up
505
.772
1.515
2.380 3.380
OPERATING PROCEDURE
1 - Place speed control in neutral or horizontal position.
2 - Start motor.
3 - Move motor shift lever to selected position. (See table)
4 - Select feed plunger position. (See table)
5 - Move feed control lever to down position.
6 - Push speed control lever down or up. (See table)
Allow time for the feed plunger to engage. If the feedscrew does not turning, move the feed plunger slightly up or down to
allow the engage.
NEVER MOVE FEED CONTROL LEVER TO UP POSITION WITHOUT FIRST DISENGAGING HANDWHEEL.
Pull handwheel out to disengage - push in to engage for hand feed.
When boring cylinders larger than 6-3/4", parallel bars (available as equipment) must be used. Centering fingers and
boring tool must used during retraction so they will not strike the base of the. Remove centering fingers immediately after
centering so that the remainder of the boring operation only the tool bit will be kept in the correct position.
BELT TENSION - On heavy rough boring cuts it will be necessary to turn tightener knob in a clockwise direction to
increase tension on. On light finish cuts it may be necessary to release the tension the belt to eliminate any shadow
patterns in the finished bore.
The stop rod is a device for measuring and controlling the travel of the boring head. However, it is not advisable to leave
the machine unattended as it reaches the end of the boring stroke.
IMPORTANT
DO NOT ATTEMPT TO BORE WITH MACHINE WITHOUT FIRST CHECKING THE MICROMETER ;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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