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The Sherline .5mm (.0197) 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 grip the part securely.
WW collets are distinct from milling collets due to their through-hole design, allowing stock to pass entirely through. The maximum diameter for stock passing through is 3/16" or 4.5mm. Collets larger than this diameter are referred to as "pot" chucks and are not bored through, being only .260" deep. The collet ensures a maximum runout of .002" or less, provided the WW collet adapter is trued as per instructions, allowing for optimal performance.
Sherline collets are logically numbered, with metric collets beginning with part number 1178 followed by size indicators in 0.1 mm increments. These collets are manufactured to standard WW specifications but are not hardened. It is crucial to verify compatibility with other manufacturers' WW collets to ensure they fit the Sherline adapter. Sherline also offers a slightly larger adapter and drawbar set to accommodate some 8 mm collets from other brands.
1x Sherline .5mm (.0197) WW Collet
0.5 mm (0.0197")
ZIP Files
Maximum runout of .002″ or less
Maximum diameter stock that can pass entirely through the collet is 3/16″ or 4.5mm
Collet sizes above 3/16″ (4.5mm) are not bored through and are only bored .260″ deep
