Expanding Arbor, Set of 8

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This expanding mandrel can be used with standard collets, vises, jaw chucks and many other special fixtures. These expanding mandrels are machinable by the customer. Chuck the shan k of the expanding mandrel in a collet, jaw chuck, or fixture. With an Allen Key tighten the hex draw bolt until it expands. Then machine the slotted part larger than bore of workpiece. Loosen hex draw bolt, position part, tighten draw screw. The part is now chucked and ready for machining. Set includes following sizes:1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/4” Multiple expanding mandrels are also used in other special fixtures for holding multiple workpieces ‘side by side’. Show more