Parlec C50-77TR4 Rigid Tapping Chuck CAT50 Taper Shank

Product Description

The PARLEC C50-77TR4 is a rigid tapping chuck designed for use with CAT50 taper shank spindles on CNC machining centers and tapping machines. It delivers a fixed, non-compensating connection between the spindle and tap, making it the right choice when the machine control handles synchronization between feed rate and spindle speed. The chuck accepts taps from M5 up to M33 in metric sizing, with a projection of 3.75 inches from the gauge line to the nose. The quick-change feature allows tap holders to be swapped without removing the chuck body from the spindle, reducing changeover time in production environments. This tool is installed by machinists and tooling technicians in job shop and production machining settings.

The C50-77TR4 suits rigid tapping operations on vertical and horizontal machining centers equipped with CAT50 spindles. It is used in applications requiring repeatable tap positioning across multiple workpieces, including threaded hole production in ferrous and non-ferrous materials. The chuck accommodates straight pipe taps from 1/16 inch to 1-1/4 inch NPT in addition to standard machine taps, expanding its utility across plumbing fixture, manifold, and fluid-system component machining. The nose diameter of 2.31 inches provides clearance in most standard fixturing arrangements.

Key Features

• Rigid tapping style for use with synchronous CNC tapping cycles
• CAT50 taper shank interface for direct spindle mounting
• Metric tap capacity from M5 to M33; inch capacity from No. 6 to 1-5/8 inches
• Quick-change design allows tap holder swaps without removing the chuck from the spindle
• Pipe tap capacity from 1/16 inch to 1-1/4 inch NPT
• Projection of 3.75 inches for reach into deep setups or fixture-obstructed workpieces

Compatibility

Designed for use with CAT50 taper spindle machining centers that support rigid tapping cycles. Compatible with tap holders sized for the 77TR quick-change system as specified by PARLEC.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing the chuck. Verify the CAT50 taper and retention knob thread specification match the machine spindle before seating the tool. Torque the drawbar or retention stud according to the machine tool builder specifications, not the chuck manufacturer, as drawbar clamping requirements vary by machine.