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The Sherline 4.5mm (.1772) 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 drawbar, threading through the headstock and into the collet's backside, pulls the collet into the adapter, causing the jaws to close and securely grip the part for machining.
WW collets are distinct from milling collets due to their through-hole design, allowing stock with a maximum diameter of 4.5mm to pass entirely through. The collet's accuracy is notable, with a maximum runout of .002 inches or less, provided the WW collet adapter is properly trued. This ensures optimal performance and minimal deviation during use.
Sherline collets are logically numbered, with metric collets beginning with part number 1178, followed by digits indicating size in 0.1 mm increments. These collets are manufactured to standard WW specifications, with a shank diameter of .312-.313 inches and a .275-40 thread. It is important 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 other brands of 8 mm collets.
1x Sherline 4.5mm (.1772) WW Collet
4.5 mm (0.1772")
ZIP Files
Maximum runout of .002″ or less
Maximum diameter stock that can pass entirely through the collet is 4.5mm
Collet sizes above 4.5mm are considered pot chucks and are not bored through
