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G4002/3 Gear Head Lathes -15-
Feed Rate Chart
Figure 11. Feed rate selector levers.
Figure 12. Feed rate selection.
This symbol indicates longitudinal feed.
This symbol indicates cross feed rates.
Important:
Do not force any selection lever on the machine. If
the lever will not engage, rotate the chuck by hand
while keeping light pressure on the selector. As the
chuck rotates, it aligns the gears and the selector
will engage.
To change the position of the feed selector, pull the
knurled handle. This disengages a pin which is
inserted into a selection hole. Position the lever in
the down position and slide to the right or left until
it is positioned below the desired selection hole.
Raise the lever with one hand while pulling the
handle with the other. The pin at the end of the
lever should align with the selection hole. If it does
not, rotate the feed rod or chuck by hand while
maintaining gentle pressure on the lever.
Feed Lever - Longitudinal and cross slide pow-
ered motions are controlled by the feed lever.
The lever pivots through two stops which require
moving the lever left and right as well as up and
down. Moving this lever upward activates the
automatic longitudinal feed. Moving the lever
down activates the cross slide. See Figure 13.
To perform a longitudinal cut in inches, use the
bottom portion of the chart. If the desired feed
rate is 0.0062"/revolution, look at the longitudinal
ranges. According to the chart we would put the
left-hand lever in the “C” position and the right-
hand lever in the “4” position. Metric calculations
would be done the same way. To perform a cross
feed cut with a feed rate of 0.0013" move the left-
hand lever to the “D” position and the right-hand
lever to the “1” position.
Please note that when either of the two selector
levers are left in the down position, the drive train
after this point is in neutral.
Figure 13. Feed lever in neutral postition.
Feed lever