Kennametal 1016591 Tap Collet Series L 0.381 Inches

Product Description

The KENNAMETAL 1016591 is a double angle tap collet in Series L, sized at 0.381 inches for use with 3/8-inch hand taps. Tap collets secure taps within a tapping chuck or holder, transmitting torque while allowing controlled axial float to prevent tap breakage during threading operations. This collet features a Total Indicator Runout (TIR) of 0.001 inches, which helps maintain thread accuracy and concentricity in precision tapping applications. The square drive measures 0.286 inches and is configured for hand tap geometry. Machinists and tool-and-die professionals install this collet in compatible tapping heads on manual or CNC machining centers.

This collet is suited for standard hand tapping operations in production machining, maintenance, and toolroom environments. It is designed for use without through-coolant and does not support tension-compression tapping configurations. Typical applications include threading ferrous and non-ferrous workpieces where consistent thread quality and low runout are required. The Series L designation identifies the collet series family, which determines compatibility with the corresponding tapping chuck or holder body.

Key Features

• Double angle collet design for secure tap retention and accurate seating
• TIR of 0.001 inches for consistent thread concentricity
• 0.381-inch collet size accepts standard 3/8-inch hand taps
• Square drive size of 0.286 inches for positive torque transmission
• Series L designation for direct fitment into compatible L-series tapping holders
• Sold individually — package quantity of 1

Compatibility

Designed for use with Series L tapping chucks and holders that accept double angle tap collets. Compatible with standard 3/8-inch hand taps. No specific model compatibility data was provided in the product input.

Installation Notes

Installation should be performed by a qualified machinist with the tapping chuck fully removed from the spindle or machine. Inspect the collet bore and seating surfaces for chips or wear before installation, as contamination will increase runout and reduce tap life. Ensure the tap shank and square drive are clean and fully seated before securing the collet. Follow the tapping chuck manufacturer's torque and assembly procedures for the specific holder body in use.