Filter
Top Products
Quick Change Selection
The two levers at the bottom of the headstock
change the feed rate, or the number of threads-
per-inch. This section of the machine is com-
monly known as the Quick Change Gear Box.
See Figure 11. The left-hand lever can be
engaged in any of five different positions and are
listed on the charts as A, B, C, D, and E. The
right-hand lever has 8 positions and are listed on
the charts as 1 through 8.
The machine label describes some of the more
typical settings which might be used. Figure 12
shows the feed rate chart located on the gear
cover of the lathe. The chart is divided into met-
ric feed rates and inch feed rates.
-14- G4002/3 Gear Head Lathes
Figure 9. Directional control lever.
Feed Direction
Selecting the Feed Rod
Never move selection levers while machine is
running.
The G4002/3 Metal Lathe can cut left or right while
feeding or threading and across both ways for fac-
ing operations. This feed direction is controlled by
the selection knob as shown in Figure 9.
When the selection knob is positioned as depict-
ed in Figure 9, the apron will move to the right
along the bed or the cross feed will travel away
from the operator. The cross feed and longitudi-
nal feed selection is controlled on the apron and
will be discussed later.
To reverse the direction of the feeding or thread-
ing operation, rotate the selection knob to the
right. It should be noted that when the lever is
positioned in the middle, no direction is selected
and all of the drive mechanisms after this point
are in neutral.
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 selec-
tor. As the chuck rotates it aligns the gears and
the selector will engage.
Figure 10. Feed rod selected.
The feed rod can be selected by rotating the han-
dle to the left as in Figure 10. Use this position for
all feeding operations. When the lever is posi-
tioned straight up, no drive device is selected and
the gear train is in neutral after this point.