Techniks 05808-381 ER32 Tap Collet 0.381 Inch

Product Description

The TECHNIKS 05808-381 is an ER32 tap collet designed to hold 3/8 inch hand taps in ER32-compatible toolholders on CNC machining centers and manual milling machines. With a collet diameter of 0.381 inches and a square drive size of 0.286 inches, this collet provides positive rotational engagement with the tap shank, allowing controlled tapping without slipping. It is a standard hand-tap style collet with no through-coolant bore and no tension-compression function. Machinists and toolroom technicians install this collet when rigid tapping or hand-tapping operations require a secure, repeatable grip on standard 3/8 inch tap shanks.

This collet fits production and job-shop environments where ER32 collet chucks are already in use. It suits rigid tapping cycles on VMCs and HMCs as well as manual tapping setups where an ER32 chuck is mounted in a drill press or knee mill. The collet is sized specifically for 3/8 inch hand taps and is not intended for pipe taps or tension-compression tap adapters.

Key Features

• ER32 collet series for broad compatibility with standard ER32 collet chucks
• 0.381 inch collet bore sized for 3/8 inch hand tap shanks
• 0.286 inch square drive engages tap shank flats to prevent rotation under load
• Hand-tap style - compatible with rigid tapping and manual tapping operations
• No through-coolant bore, simplifying setup in standard collet chucks

Compatibility

Designed for use with ER32 collet chucks accepting hand-tap style collets sized for 3/8 inch tap shanks. No specific machine model compatibility was provided in the product data.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down the spindle and confirm it has stopped completely before changing collets. Insert the collet into the ER32 nut before threading the nut onto the chuck body, then seat the tap shank fully and torque the nut with an ER collet wrench to the chuck manufacturer's specification. Inspect the collet bore and square drive pocket for chips or wear before each use to ensure proper seating and torque transfer.