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Description
Sherline 5.2mm (.2047) WW Collet
Ensures high centering accuracy
Accommodates diameters ±.001" tolerance
Supports stock up to 3/16" diameter
Features maximum runout of .002"
Compatible with WW collet specifications
The Sherline 5.2mm (.2047) 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 into the collet's backside, drawing it into the adapter and causing the jaws to close and grip the part securely. This system is renowned for its accuracy, accommodating a narrow 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 with a maximum diameter of 3/16″ or 4.5mm to pass entirely through. Collets exceeding this diameter, known as "pot" chucks, are not bored through but are instead bored to a depth of .260″. The collet's runout is minimal, with a maximum of .002″, and when the WW collet adapter is properly trued, it achieves optimal accuracy.
Sherline 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. The collets are available in both inch and metric sizes, with the metric sizes ranging from .3 mm to 8.0 mm in .1 mm increments. Special sizes can be ordered upon request.
