The collet fixture was designed to be mounted either on the surface of the rotary table or on the mill table. A knurled ring allows WW collets to be tightened without the use of a drawbolt from the back. This is particularaly useful for clockmakers for gearcutting on a gear blank that has a pinion shaft attached that can be held in a collet. A bushing is provided that fits into the center hole of the rotary table and helps locate the fixture on center. T-nuts and attaching screws are also provided for clamping the fixture in place in the rotary table or mill table T-slots.
WW collets vary somewhat in size depending on manufacturer. The 1164 adapter holds collets made by Sherline and others with a .312-.313" body size and .275-40 thread, which we refer to as WW collets. Other common "WW" collets have a body size of .314-.315, which we refer to as "8.0 mm" collets. A fixture for these collets is also available as P/N 1165. It looks identical except that it is identified by a groove machined around the body. If you are using a brand of collets other than Sherline, measure the body diameter with a micrometer before deciding which collet fixture to order.
Download PDF 1164 Instructions