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Unconditional Satisfaction GuaranteeNo Shipping Fees Above 302 Months to Decide. Returns Simplified.The Sherline 4.7mm (.1860) 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 mechanism involves a drawbar threading through the headstock and into the collet’s backside, drawing it into the adapter and causing the jaws to close and securely grip the part for machining. Each collet size accommodates a limited range of diameters, approximately .001 (.02mm), ensuring precision in 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 referred to 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 not hardened but are manufactured to standard WW specifications. It is crucial to verify compatibility with Sherline’s adapter when using WW collets from other manufacturers. Sherline also offers a slightly larger adapter and drawbar set to accommodate some other brands of 8 mm collets.
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