Parlec C40-77TR4 Tapping Chuck CAT40 Rigid Taper Shank

Product Description

The PARLEC C40-77TR4 is a rigid tapping chuck with a CAT40 taper shank designed for CNC machining centers and tapping operations requiring precise, non-compensating thread cutting. It accepts taps ranging from M5 to M33 (No. 6 to 1-5/8 inches imperial), covering a wide range of threading applications in ferrous and non-ferrous materials. The chuck features a quick-change interface for fast tap changeovers and a 3.75-inch projection that positions the tap clear of fixtures and workpiece features. Machinists and CNC operators install this chuck in CAT40 spindles where rigid tapping cycles are supported by the machine control.

This tapping chuck is suited for production tapping on vertical and horizontal machining centers with synchronous rigid tapping capability. The CAT40 taper connection provides high repeatability and concentricity for consistent thread quality across batch runs. Pipe tap capacity spans 1/16 inch to 1-1/4 inch NPT, making it useful in shops that cut both standard and pipe threads on the same machine. The 2.310-inch nose diameter is sized to clear standard part features and vise jaws in typical workholding setups.

Key Features

• Rigid tapping style - no torque compensation, requires machine with synchronous rigid tapping control
• CAT40 taper shank for positive spindle engagement and high repeatability
• Quick-change interface allows fast tap swaps without removing the chuck from the spindle
• Tap capacity M5 to M33 (No. 6 to 1-5/8 inches) covers common thread sizes in most production environments
• Pipe tap capacity 1/16 inch to 1-1/4 inch for NPT threading applications
• 3.750-inch projection provides clearance over deep fixtures and tall workpieces

Compatibility

Designed for use in CAT40 spindle machines with synchronous rigid tapping capability. Accepts taps in the M5 to M33 metric range and No. 6 to 1-5/8 inch imperial range via the quick-change collet system.

Installation Notes

A licensed machinist or CNC operator should install this chuck following the machine tool builder's spindle tooling procedures. Power down and lock out the machine before seating or removing the chuck from the spindle. Ensure the CAT40 taper and spindle bore are clean and free of chips or coolant residue before installation. Rigid tapping requires the machine control to be programmed for synchronous tapping cycles - do not use this chuck with non-synchronous or floating tap holders.