Kennametal 1016656 Tap Collet Series L 0.438 Inch

Product Description

The KENNAMETAL 1016656 is a double angle tap collet in the L collet series, designed to hold pipe taps securely during threading operations. Built to a 0.438-inch collet size with a 0.328-inch square size, this collet delivers a total indicator runout (TIR) of 0.001 inches, supporting accurate, repeatable thread cutting in production and job-shop environments. It is compatible with 1/8 LS pipe taps. The 1016656 is installed by machinists and tool-room technicians in CNC and manual tapping applications where consistent tap alignment is critical to thread quality and tool life.

This collet is suited for pipe tapping applications in metalworking environments, including production machining, maintenance shops, and precision fabrication. The Series L double angle design seats firmly in matching L-series collet chucks, maintaining concentricity through repeated tool changes. Intended for right-hand pipe tap work, it does not support through-coolant delivery or tension-compression tap holders. Typical applications include tapping NPT pipe threads in steel, aluminum, and cast iron workpieces.

Key Features

• Double angle collet design provides secure, concentric tap seating in Series L collet chucks
• TIR of 0.001 inches supports accurate thread alignment and reduces tap breakage
• Sized for 1/8 LS pipe taps with a 0.328-inch square drive opening
• 0.438-inch collet bore accommodates standard pipe tap shank dimensions
• No through-coolant passages, simplifying setup in standard tapping heads
• Lightweight at 0.15 pounds, easy to handle during tool changes

Compatibility

Designed for use with 1/8 LS pipe taps in Series L double angle collet chucks. Consult the collet chuck manufacturer specifications to confirm Series L collet acceptance before installation.

Installation Notes

Installation and tool changes should be performed by qualified machinists or tooling technicians with the machine powered down and all motion stopped. Seat the collet fully into the chuck body before tightening the collet nut to the chuck manufacturer's specified procedure. Inspect the collet bore and seating surfaces for chips or wear before each use, as contamination directly affects TIR and tap concentricity. Do not exceed the tap size range marked for this collet series.