Techniks 31/12-4127 Tap Collet Ansi 2 0.367 Inch

Product Description

The TECHNIKS 31/12-4127 is an ANSI Series 2 tap collet designed to hold 1/2 inch hand taps in compatible tap holders and tapping heads. With a collet bore of 0.367 inches and a square drive size of 0.275 inches, this collet provides a secure, accurate grip during hand tapping operations. It does not support through-coolant delivery or tension-tap float, making it a straightforward, rigid-holding collet suited for standard hand tap applications. Machinists and toolroom professionals install this collet when setting up manual or machine-assisted tapping cycles on lathes, mills, or drill presses.

This collet is intended for hand tapping applications in production and toolroom environments. The ANSI 2 series sizing makes it compatible with ANSI-standard tap holders designed to accept the corresponding collet series. Typical use cases include threading operations on ferrous and non-ferrous workpieces where a 1/2 inch hand tap is the cutting tool of choice. It is suitable for both light manufacturing and maintenance, repair, and operations settings where repeatable tap holding is required.

Key Features

• ANSI Series 2 collet for use with ANSI-standard tap holders
• 0.367 inch bore accommodates 1/2 inch hand taps
• 0.275 inch square drive size for positive torque transfer
• Designed for hand tap holding - no through-coolant or tension-tap float
• Rigid-holding design supports consistent thread quality in standard tapping operations

Compatibility

Designed for use with ANSI Series 2 tap holders that accept 0.367 inch bore collets for 1/2 inch hand taps.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the tap holder and spindle are fully de-energized and the machine is locked out before inserting or removing the collet. Clean the collet bore and mating surfaces before installation to prevent runout and premature wear. Do not use this collet with tension-tap or through-coolant setups, as it is not rated for those configurations.