- Automatic temperature adjustment cat bedSherline .4mm (.0157) WW Collet

• Sherline .4mm (.0157) WW Collet
• Ensures precise centering accuracy
• Accommodates diameters ±.001″
• Features minimal runout of .002″
• Allows full pass-through up to 4.5mm
• Offers sizes from .3mm to 8.0mm

The Sherline .4mm (.0157) 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. This system is renowned for its accuracy, accommodating only a narrow range of diameters, 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. Larger collets, known as "pot" chucks, are available but are not bored through, being only .260″ deep. 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 logically numbered, with inch collets starting with part number 1160 and metric collets with 1178, followed by digits indicating size. These collets are not hardened but adhere to standard WW specifications. It is crucial to verify compatibility with Sherline's adapter when considering collets from other manufacturers. Sherline also offers a slightly larger adapter and drawbar set to accommodate some 8 mm collets from other brands.