Ultra-Lock Arbors operate with “pull-back” action requiring a work stop for location in the z axis.

• Fixed work stop is recommended for part pieces where the endwise locationg surface is square to locating diameter.
• Rocker style work stop is recommended for part pieces where the endwise locating surface is not square to the locating diameter.
• Restrictor style work stop is a combination work stop and retaining sleeve and is required for a part piece where the locating length of the part is shorter than the collet. The Ultra-Lock Collet expands from both ends, therefore a retaining sleeve is necessary to prevent the free end of the collet from over expanding. A restrictor expander is required to reduce the expansion safety stop to prevent collet breakage if the arbor is operated without a part in place.