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Weldon Shank Adapter is an industry standard for properly fastening your end-mills and drills. Unfortunately,
the conventional ER collet does not use a set screw to fasten the Weldon Shank Adapter (it uses a spring
action to close in on the parameter of the shank) so it is much less effective for rigid clamping. The
PRECI-FLEX Weldon Shank Adapter is
primarily important for larger diameter tools where the collet's clamping force is insufficient to avoid
slippage. Because collets are not utilizing the Weldon connection, the drills and end-mills have a
tendency to slip in the collet which leaves a bad finish and generate tremendous heat in the collet
pocket. The most common problem when slippage occurs is tool breakage, fortunately, the Weldon Shank
Adapter has an internally ground bore and uses a set screw to pull in the end-mill or drill and properly
fasten it with the most rigidity available. Each adapter is equipped with a set screw at the bottom of the
chuck to act as an adjustable stop. You can expect increases in tool life, feeds and speeds of your
operations.
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