5/16" ER20 PRECISION SPRING COLLET

ER collets have a wide clamping range and high accuracy. While they are designed for tool holding, they work great for work holding in small lathes. With a full set of ER collets you can hold any diameter that is in the clamping range of the set.

FEATURES:

• The only clamping collet system for combined milling, drilling, reaming, tapping and boring operations.
• These collets allow for machining in tight locations with reduced outside nose diameter.
• Unique self-releasing system eliminates sticking.
• Concentricity guaranteed to 0.0004”.
• Wide holding range of each collet requires fewer collets and changes.
• Collapse approximately 1/32” while maintaining full accuracy.
• Standard 0.0002” T.I.R.
• Collapse Range: 0.039”
• Inspected for quality and accuracy.