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Model G9986 8" Drill Press
-21-
Figure 23. Quill lash set screw.
The Model G9986 features a lash adjustment set
screw for the quill. Quill lash is the freeplay in the
quill as it moves up and down. Having too much
lash in the quill makes the quill prone to vibration
and runout. Setting the quill lash too tight makes
it difficult to move the quill up and down. The
goal is to find the "sweet spot" where there is the
perfect balance between ease of movement and
restricted quill lash.
Tools Needed Qty
Hex Wrench 3mm ..............................................
1
Wrench 10mm ...................................................
1
Lash Adjustment
To set the quill lash set screw:
1. Loosen the jam nut that locks the set screw
in place.
2. Move the downfeed up and down with one
hand and tighten the set screw with the other
hand until you feel a light drag on the quill as
you move it up and down.
3. Slowly loosen the set screw while moving the
quill up and down. Stop moving the set screw
when you feel all quill drag disappear.
4. Using the hex wrench, hold the set screw in
place and tighten the jam nut.
Feed Shaft Spring
Tension
The feed shaft return spring is adjusted at the
factory. Only adjust the feed shaft return spring if
you are having troubles with the return pressure
and you have first adjusted the quill lash.
Figure 24. Feed shaft return spring assembly.
Wear safety glasses when
adjusting springs. Serious
injury may occur if this
warning is ignored!
Tools Needed Qty
Heavy Leather Gloves ................................1 Pair
Wrench 14mm ...................................................
1
To adjust the feed shaft spring tension
:
1. UNPLUG THE DRILL PRESS!
2. Wipe off any oil on the spring lock cover so
it does not slip in your fingers when you hold
the cover from spinning (see
Figure 24).
Spring Cover
Lock Slot
Spring Lock
Cover
Quill Lash
Set Screw
Jam Nut and
Cover Nut