Kennametal 1016473 Tap Collet Series J 0.255 Inch

Product Description

The KENNAMETAL 1016473 is a Double Angle tap collet in the J series, designed to hold hand taps securely in compatible tapping heads and holders. With a collet size of 0.255 inches and a square drive size of 0.191 inches, it delivers precise tap engagement for threading operations in metal fabrication and machining environments. The total indicator runout (TIR) is rated at 0.001 inches (0.030 mm), which supports accurate thread formation and reduces tap breakage. This collet does not include through-coolant or tension-tap features. It is installed by machinists and toolroom technicians working with manual or CNC tapping setups.

This collet is suited for use in production machining, job shop tapping, and general metalworking applications where repeatable, low-runout tap holding is required. It accommodates hand taps and is intended for use within J-series Double Angle collet tapping systems. The 0.255-inch bore and 0.191-inch square size correspond to a 1/4-14 tap configuration, making it a common replacement or additional collet for shops running that tap size regularly.

Key Features

• Double Angle collet design for secure tap retention in J-series tapping holders
• Collet bore size: 0.255 inches for precise tap fit
• Square drive size: 0.191 inches to positively drive the tap shank
• Low TIR of 0.001 inches (0.030 mm) for accurate thread alignment
• Compatible with hand taps; no through-coolant or tension-tap function

Compatibility

Designed for use with J-series Double Angle collet tapping heads and holders that accept hand taps with a 0.255-inch shank and 0.191-inch square drive.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the tapping head and spindle are fully powered down and at rest before changing collets. Clean the collet seat and bore before seating to maintain runout specifications. Follow the tapping head manufacturer's torque and assembly procedures for the J-series collet retention nut.