Techniks 05570-318 ER32 Tap Collet 0.318 Inch

Product Description

The TECHNIKS 05570-318 is an ER32 tap collet designed to hold 5/16 inch hand taps in ER32 collet chucks. With a decimal bore size of 0.318 inches and a square drive size of 0.238 inches, this collet provides secure, concentric grip during tapping operations. It is built for use in manual and machine tapping applications where a standard hand tap must be held firmly and released cleanly. Machinists, toolroom technicians, and CNC operators install this collet as part of a tap collet system to improve tap alignment and reduce breakage.

This collet fits into ER32-compatible collet chucks and is suited for production and jobshop tapping operations on mills, drill presses, and tapping heads. The 5/16 inch tap size covers a common range of inch-series threading work in steel, aluminum, and similar materials. The collet does not support through-coolant or tension-compression floating - it is a rigid-style tap holder suited to applications where those features are not required.

Key Features

• ER32 collet series for broad chuck compatibility
• 0.318 inch bore accepts 5/16 inch hand taps
• 0.238 inch square drive size for positive tap engagement
• Rigid collet design - no tension or compression float
• No through-coolant port, simplifying setup in dry or flood-cooled environments

Compatibility

Designed for use with ER32 collet chucks accepting tap collets for 5/16 inch hand taps.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the machine spindle before inserting or removing collets. Seat the collet fully into the ER32 nut before threading onto the chuck body, and torque the nut with the appropriate ER collet wrench - do not use substitute tools that can damage the nut or collet taper. Inspect the collet bore and chuck taper for chips or debris before each use to ensure proper seating and runout performance.