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Unconditional Satisfaction GuaranteeNo Shipping Fees Above 302 Months to Decide. Returns Simplified.The Sherline 5.1mm (.2008) WW Collet offers a precise 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 into the collet’s backside, drawing it into the adapter, which closes the jaws to grip the part securely.
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, known as “pot” chucks, are not bored through and are only bored to a depth of .260″. The collet’s accuracy is notable, with a maximum runout of .002″ or less, provided the WW collet adapter is trued as per instructions.
Sherline 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 available in both inch and metric sizes, with the metric collets beginning with part number 1178 followed by size indicators in 0.1 mm increments. It is crucial to verify compatibility with other manufacturers’ WW collets to ensure they fit the Sherline adapter. Special sizes can be ordered, and larger “pot” chucks are also available.
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