Notice, Setting the power feed rate – Grizzly G0492 User Manual

Page 31

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G0492 12" X 36" Combo Lathe/Mill

-29-

The carriage has longitudinal and cross slide
power feed capabilities. All directions reverse
when spindle rotation is reversed.

To set and engage the power feed:

1. DISCONNECT THE LATHE/MILL FROM

POWER!

2. Refer to the Change Gear Chart on Page

31 to determine the needed combination of
gears and which spindle location to install
each gear on. See

Figure 33 for the gear

installation locations that are referenced by
the chart.

3. See Figure 34 for an example of gear com-

binations that give the longitudinal and cross
slide rates. For example: The chart shows
that 0.0089" of longitudinal travel per revolu-
tion of lead screw is needed, or 0.0019" of
cross travel per revolution of lead screw is
needed.

Note: All change gears are stamped with the
number of teeth they have.

Figure 35. Leadscrew and feed levers.

Figure 33. Change gear locations.

D

C

A

B

N

M

Longitudinal

Feed

Cross

Feed

Inch

Threading

Lash

Adjuster

and

Lock

Nut

NOTICE

Feed rate is based on spindle RPM. Pay

close attention to the feed rate you have

chosen and be ready to disengage the

apron. Failure to do this may cause the

carriage to crash into the chuck.

Figure 34. Using the change gear chart.

Feed

Lever

Leadscrew Lever

Apron

Lock

Bolt

Setting the Power

Feed Rate

4. Loosen the lash adjuster (Figure 33) and

swing the assembly out of the way.

5. Remove the required E-clips, lubricate, and

swap out the appropriate change gears.

6. Move the lash adjuster so the gear backlash

is at 0.003" to 0.008", and tighten the lock
nut.

7. Use the leadscrew lever to select leadscrew

rotation direction (

Figure 35).

8. Loosen the apron lock bolt, and use the feed

lever (

Figure 35) to engage the cross slide or

longitudinal feed.

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