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Description
Sherline 1.8mm (.0709) WW Collet
Ensures high centering accuracy
Provides precise part mounting
Allows full pass-through up to 3/16″
Fits Sherline drawbar and adapter
Manufactured to standard WW specs
The Sherline 1.8mm (.0709) 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. The drawbar, threading through the headstock and into the collet's backside, pulls the collet into the adapter, causing the jaws to close and securely grip the part for machining. Each collet is designed to accommodate a narrow range of diameters, approximately ±.001″ (.02mm), ensuring precise part mounting.
WW collets are distinct from milling collets due to their through-hole design, allowing stock with a maximum diameter of 3/16″ or 4.5mm to pass entirely through. Collets larger than this diameter are known as "pot" chucks and are not bored through, being only .260″ deep. This design may result in increased runout further from the collet's front, depending on the setup and part length.
Sherline collets are logically numbered, with metric collets beginning with part number 1178, followed by two digits indicating 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. They are not hardened and are specifically designed to fit Sherline's drawbar and adapter. It is advisable to verify compatibility with WW collets from other manufacturers before purchase.
