Spindle Break-In; Recommended Adjustments - Grizzly G0750GV Owner's Manual

Spindle Break-In

Before subjecting the spindle to operational loads,
it is essential to complete the break-in process.
This helps maximize the life of spindle bearings
and other precision components by thoroughly
lubricating them before placing them under load.
After spindle break-in is complete, we recommend
changing headstock and gearbox oil to remove
any metal particles or debris that are present from
the assembly and break-in process.
The break-in must be performed in succession
with the Test Run procedure described in this
manual, as the steps in that procedure prepare
the lathe controls for the break-in process.
DO NOT perform this procedure indepen-
dently of the Test Run section. The lathe
could be seriously damaged if the controls
are set differently than instructed in that
section.
To perform spindle break-in procedure:
1. Successfully complete the Test Run proce-
dure beginning on Page 24.
2.
Set spindle speed range lever in Low (L)
range, select forward spindle rotation, then
turn machine ON and run spindle at 70 RPM
for 10 minutes.
3. Turn machine OFF, switch spindle rotation
to reverse, then turn machine ON and run
spindle at 70 RPM for 10 more minutes.
IMPORTANT: Always turn lathe OFF when
switching spindle rotation direction or chang-
ing spindle speed range to avoid damaging
gears.
4. Repeat Steps 2–3 at 200 and 400 RPM for 5
minutes each. Turn machine OFF.
5.
Set spindle speed range lever to High (H).
-26-
6. Repeat Steps 2–3 at spindle speeds of 500,
1000, and 2200 RPM. Run for a minimum of
5 minutes at each speed in each direction of
rotation.
7.
Press Emergency
DISCONNECT MACHINE FROM POWER!
8.
Change the headstock and gearbox oil before
operating the machine further to ensure full
machine warranty (refer to Lubrication on
Page 60).
Recommended
Adjustments
The following adjustments have been made at the
factory. However, because of the many variables
involved with shipping, we recommend that you
at least verify the following adjustments to ensure
the best possible results from the lathe.
Step-by-step instructions for these adjustments
can be found on the pages referenced below.
Factory adjustments that should be verified:
• Tailstock alignment (see Page 36).
• Cross slide and compound slide backlash
adjustment (see Page 69).
Gib adjustments (see Page 70).
•
Model G0750GV (Mfd. Since 03/18)
Stop button and