Kennametal 1016660 Tap Collet Series L 0.542 Inch

Product Description

The KENNAMETAL 1016660 is a double angle tap collet in the L series, designed to hold hand taps securely in compatible tap holders and tapping heads. With a collet size of 0.542 inches and a square drive size of 0.406 inches, it accommodates 11/16-inch hand taps. The total indicator runout (TIR) is rated at 0.001 inches (0.030 mm), supporting precise tap alignment during threading operations. This collet is installed by machinists, toolroom technicians, and production operators working on CNC machining centers, manual lathes, drill presses, or dedicated tapping machines.

This tap collet is suited for hand tapping applications in production and job-shop environments where repeatable tap seating and low runout are required. It does not support through-coolant delivery or tension-tap configurations. Typical use cases include threading ferrous and non-ferrous workpieces where an L-series collet holder is already in use. The double angle collet design provides consistent grip and release across tap changes, making it practical for moderate-to-high volume tapping cycles.

Key Features

• Double angle collet design for secure tap engagement and consistent grip
• L series collet sizing for direct fit with L-series tap holders
• TIR of 0.001 inches (0.030 mm) for accurate tap alignment
• 0.542-inch collet bore accommodates 11/16-inch hand taps
• 0.406-inch square drive size matches standard hand tap shanks
• No through-coolant or tension-tap features — straightforward rigid-tap application

Compatibility

Designed for use with L-series tap holders and tapping heads that accept double angle tap collets. Compatible with 11/16-inch hand taps having a 0.406-inch square shank. Verify holder series and square size before installation.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. De-energize and lock out the machine before inserting or removing the collet from the holder. Use the appropriate collet wrench or spanner for the L-series holder — do not over-tighten by impact. Inspect the collet bore and seating surfaces for wear or debris before each tap change to maintain TIR within specification.