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Description
Sherline 9/32" (.2813) WW Collet
Offers high centering accuracy
Ensures max runout of .002″
Fits with specially designed adapter
Accommodates varied diameters ±.001″
Available in both inch and metric sizes
The Sherline 9/32" (.2813) WW Collet offers a precise and efficient method for mounting cylindrical parts or bar stock in a lathe, ensuring high centering accuracy. This collet functions as a small, precision 3-jaw chuck that fits into a specially designed tapered adapter within the headstock. A drawbar threads into the collet's backside, drawing it into the adapter, which causes the jaws to close and securely grip the part to be machined. This system provides exceptional accuracy, accommodating a small range of diameters with a tolerance of approximately ±.001″ (.02mm).
WW collets are distinct from milling collets due to their through-hole design, allowing stock to pass entirely through up to a maximum diameter of 3/16″ or 4.5mm. Collets larger than this diameter are referred to as "pot" chucks and are not bored through, being only .260″ deep. The collet's maximum runout is .002″ or less, and when the WW collet adapter is properly trued, it operates with optimal precision.
Sherline collets are logically numbered, with inch collets beginning with part number 1160 followed by size in 64ths of an inch, and metric collets starting with 1178 followed by size in 0.1 mm increments. These collets are manufactured to standard WW specifications, with a shank diameter of .312-.313 and a .275-40 thread. It is crucial to verify compatibility with other manufacturers' WW collets to ensure they fit the Sherline adapter.
