- Dog heart rate monitoring collarSherline 6.9mm (.2717) WW Collet

• Sherline 6.9mm (.2717) WW Collet
• Ensures high centering accuracy
• Fits into specially designed tapered adapter
• Allows stock to pass through up to 4.5mm
• Offers maximum runout of .002″ or less
• Manufactured to standard WW specifications

The Sherline 6.9mm (.2717) 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 securely grip the part being machined.

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 larger than this diameter, known as "pot" chucks, are not bored through but are instead bored to a depth of .260". The collet's accuracy is notable, with a maximum runout of .002" or less, provided the WW collet adapter is trued as per instructions, ensuring optimal performance.

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 and a .275-40 thread, though they are not hardened. It is crucial to verify compatibility with other manufacturers' WW collets to ensure they fit the Sherline adapter.