1. Do not make the cavity
too deep. Maximum depth
should be 7/32". If you go as
deep as the straight section
on the outside of the jaws the
jaws will grip very poorly.
2. Back taper 2° or 3°. The
jaws will hold much better in
a straight sided cavity than
they will in a cavity that has
too much taper.
When gripping the outside
of a board grain foot
1 Make the foot 1/4" deep
or more.
2 Stop off the top of the
jaws, do not make the spig-
ot so long that it reaches
the bottom of the jaws and
make the corner sharp.
Make the foot straight.
Jaw Design and Holding Power.
It is virtually impossible to design jaws that will not mark the wood. Collet
type jaws and dovetail jaws will leave minimal marks
but they will leave some marks and have the dis-
advantage of only holding well over an extreme-
ly limited range.
ONEWAY
top jaws are
designed to grip well over their entire range.
As for the marks made by the jaws we believe
that the marks from our jaws are much easier
to remove than the marks made by a bowl fly-
ing out of a chuck and hitting the floor.
Foot Specifications for Chucking Board Grain
Recess or Tenon Specifications for Chucking Board Grain
Specifications for Chucking Spindle Turning (End Grain)
When gripping round end grain
stock, make the spigot the same
shape as for board grain.
2
1
Min. Dia. 2.0"
Min. Depth 3/16"
Max. Dia. 3-1/2" Max. Depth 15/32"
Min. Dia. 2-3/8" Min. Depth 1/8"
Max. Dia. 4.0"
Max. Depth 7/32"
Minimum Diameter 2.0"
Minimum Depth 3/16"
Maximum Diameter 3-1/2"
Maximum Depth 15/32"
-A-
-B-
