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The maximum speed allowed for a mortis/recess varies with the type of intended
operation. This would mostly be based upon the user experience of the user, size of
material being turned, quality of the material being turned and how balanced the
piece is. Therefore, consult with a skilled professional for the maximum speed limits
for your workpiece if you are not confident with your chucking technique.
Forming a Tenon/Spigot
A tenon/spigot is a protruding cylinder formed for the accessory jaw segments to
securely grip the workpiece. The length of the spigot should be slightly shorter than
the internal height of the jaws you are using.
It is recommended turn between
centres for all pieces whenever
possible
Ensure the side surface of the
tenon/spigot has the proper
dovetail profile. If the spigot
(tenon) is straight, the piece may
not be secured properly and
dislodge from the chuck.
The workpiece
should never touch
these parts of the
jaws
The
workpiece
should
only touch
these two
surfaces
