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Gap Insert Removal
& Installation
This lathe is equipped with a removable gap
insert that will allow for turning large diameter
workpieces. The gap was seated, pre-loaded, and
then ground for precise mating and alignment at
the factory.
Removing the gap can cause the lathe insert to
slightly spring out of shape. When re-installed,
there is no guarantee that original alignment and
flush mating will be the same. For this reason,
removing the gap is considered a permanent
alteration to the lathe, even if it is later re-installed.
Items Needed
Open-End Wrench 14mm .................................. 1
Hex Wrench 8mm .............................................. 1
Heavy Dead-Blow Hammer ............................... 1
Miscellaneous C-Clamps ................ As Required
Wooden Blocks ............................... As Required
Mineral Spirits .................................... As Needed
To remove gap insert:
1.
DISCONNECT MACHINE FROM POWER!
2.
Remove (4) cap screws that secure gap to
bed (see Figure 130).
3.
Tighten dowel-pin jack nuts (see Figure 130)
to draw pins from gap.
Preload Set Screw
Dowel
Pin
Cap
Screws
Figure 130. Gap retaining fasteners.
-76-
4.
Loosen preload set screw (see Figure
130) a few turns until it no longer contacts
headstock.
5.
Tap outside of gap piece with dead-blow
hammer to loosen it, and, with help of another
person, remove gap piece.
To re-install gap:
1.
Clean all mating surfaces completely with
mineral spirits and inspect and remove any
burrs. ALL MATING SURFACES MUST BE
ABSOLUTELY CLEAN!
2.
Lightly oil lint-free cloth with way oil, and rub
thin film into pores of freshly cleaned gap
surfaces. Next, place gap in position on lathe
bed.
Qty
3.
Back off threaded dowel pin jam nuts until
they are flush with end of pins, and drop pins
into pin holes in gap.
4.
Jostle gap closer to its final alignment until
pins seat naturally.
5.
Install and lightly snug (4) cap screws in
order that will draw gap closer into alignment.
Using wood blocks and clamps to get mating
surfaces into alignment can also be helpful.
6.
When alignment and flush mating is accept-
able, tighten (4) cap screws in a pattern that
will maintain or improve alignment.
7.
Wait 24 hours, then check for quality of mat-
ing. If unacceptable, use clamps and wood
blocks, then loosen and tighten appropriate
cap screws to draw in and release certain
areas of gap to achieve required alignment.
8.
When satisfied with alignment, tap dowel pins
the rest of the way into gap until they are in
a fully seated position, and thread jack nuts
down until they just contact gap.
9.
Tighten preload set screw inward until it con-
tacts headstock and resistance can be felt,
then tighten it an additional
⁄
turn.
3
4
Model G0750GV (Mfd. Since 03/18)
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