Grizzly G8750 User Manual

MODEL G8750

6" X 181⁄2" COMPOUND

SLIDE TABLE

INSTRUCTIONS

For questions or help with this product contact Tech Support at [phone] or [e-mail]

Introduction

The Model G8750 features 12" of longitudinal
travel and 7
dovetailed ways, Acme thread leadscrews, vernier
scales, and

1

⁄2 " of cross travel, adjustable gibs,

9

⁄16" T-slots.

Inventory

Description Qty

A. Compound Slide Table ............................... 1

B. Handwheels ................................................ 2

C. Handwheel Lock Nuts ................................ 3

D. Handwheel Handles ................................... 3

E. Keys 4 x 4 x 10 ........................................... 3

Tools Needed

Description Qty

• Open-End Wrench 10mm ........................... 1

• Hex Wrench 4mm ....................................... 1

• Hex Wrench 5mm ....................................... 1

• Standard Screwdriver #2 ............................ 1

Assembly

1. Secure the compound slide table by bolting

both sides of the base to your machine.

2. Place the 4 x 4 x 10 key onto the cross slide
(Y-axis) leadscrew, slide the handwheel onto
the leadscrew over the key, then hand tighten
the lock nut.

3. Hold the lock nut in position with a wrench
and tighten the set screw, as shown in Figure

1.

Lock Nut

Set Screw

Figure 1. Securing the handwheel.

Wear safety glasses dur­ing the assembly and
adjustment steps.

COPYRIGHT © MARCH, 2012 BY GRIZZLY INDUSTRIAL, INC., NOVEMBER, 2015 (ST)

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

#BL14920 PRINTED IN CHINA

4. Install the handwheel handle.

5. Repeat Steps 2–4 to install the longitudinal

(X-axis) handwheels. Make sure you install
these simultaneously. Otherwise, the lead­screw could accidentally unwind from the
table and introduce backlash.

Adjusting Backlash

The amount the handwheels rotate without mov­ing the table is the backlash. Generally, 0.005"–

0.010" of backlash is acceptable.

Adjusting Gibs

The function of the gibs is to remove play in the
table and cross slide without causing the slides
to bind.

When the handwheels are correctly installed they
contact the leadscrew support blocks (Figure 2),
and the table moves when the handwheels are
rotated.

Leadscrew

Support Blocks

Figure 2. Leadscrew support blocks.

The table will not move if either handwheel is not
touching a leadscrew support block.

To adjust backlash:

1. Rotate one of the X-axis handwheels until it

contacts the leadscrew support block.

Each gib has multiple lock nuts and gib screws
that need to be adjusted. When adjusting, make
your adjustments equally and in small increments,
and test the feel of the table movement while
doing so until it feels right.

To adjust the gibs:

1. Loosen the lock nuts (see Figure 3).

Table Gib Screw

& Lock Nut

Cross Slide Gib

Screw & Lock Nut

Figure 3.

Gib screws and lock nuts.

2. On the opposite side of the table, push the

other handwheel against the leadscrew sup­port block, loosen the set screw (see Figure

1) several turns, hand-tighten the lock, then
tighten the set screw.

2. Depending on current table movement, slight­ly loosen or tighten each gib screw in equal
amounts, then move the table and test the
feel. When properly adjusted, the gibs should
offer slight resistance without binding.

3. Tighten the lock nuts without moving the gib
screws.

Lubrication

1. Keep the compound slide in good working

order by lubricating all moving parts frequent­ly with general purpose oil.

2. Keep a thin layer of general purpose oil on
the table and other non-painted surfaces
when not in use to help prevent rust.

If you need help with your new compound slide
table, call our Tech Support at: [phone].

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G8750 Compound Slide Table