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Description
Sherline 5.9mm (.2323) WW Collet
Ensures high centering accuracy
Offers precise 3-jaw chuck function
Allows stock up to 3/16" to pass through
Customizable larger "pot" chucks
Meets standard WW specifications
The Sherline 5.9mm (.2323) 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, which in turn 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 exceeding this diameter, known as "pot" chucks, are not bored through but are instead bored to a depth of .260". This design may result in increased runout further from the collet's front, depending on the setup and part length.
Sherline collets are manufactured to standard WW specifications, with a shank diameter of .312-.313 and a .275-40 thread. They 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 and larger "pot" chucks can be custom ordered if needed.
