Collet Nut Torque
Accurate collet nut torque is essential to the proper operation of a CNC machine. A torque wrench is the only way to ensure that the proper torque value is applied. Over-tightening a collet nut will cause distortion and under-tightening will lead to tool slippage. These conditions will produce tool run-out, tool wear, tool breakage and finish degradation. Torque wrenches should only be used to tighten and never to loosen. Please contact Allied Tool Group for additional information about torque wrenches.
Collet Maintenance
- A worn or improperly tightened collet will cause vibration, tool breakage, decreased tool life and a poor quality edge finish.
- Replace collets every 400 to 600 hours of machine time or every 6 months when running 8 hours per day.
- Always replace a collet that is damaged or showing signs of wear.
- Properly maintain and thoroughly clean collets after every tool change to minimize tool run out and increase tool life.
- Cutting tool life will decrease by approximately 10% for every .0001" of TIR.
- Use a torque wrench to tighten the collet nut. A torque wrench is the only way to ensure that the proper torque value is applied. See the collet nut torque guide on page 3.
- If you are unsure of the type of collet your machine requires, please consult the collet sizing guide below.