Parlec C40-77TA4 Tapping Chuck CAT40 Tension Compression

Product Description

The PARLEC C40-77TA4 is a taper shank tapping chuck designed for tension and compression tapping operations on machining centers. It accepts a CAT40 taper interface and covers a wide tap range from M3.5 (No. 6) through M36 (1-5/8 inch), making it suitable for a broad range of threading work in production and job shop environments. The chuck projects 4.85 inches from the spindle face and features a nose diameter of 2.31 inches. Compression travel runs from 0.00 to 0.25 inches and tension travel is 0.56 inches, giving the chuck controlled float to reduce tap breakage and thread distortion during rigid-style tapping cycles.

This chuck is used on vertical and horizontal machining centers equipped with a CAT40 spindle. It suits applications in ferrous and non-ferrous materials where a wide tap-size range must be covered with a single toolholder. Typical users include CNC machinists and tool setters in precision manufacturing, general machining, and high-mix production shops. The unit does not include through-spindle coolant capability and is not a quick-change design, making it a straightforward, dedicated tapping solution where repeatability and float control are the priority.

Key Features

• CAT40 taper shank for direct spindle mounting on standard machining centers
• Tension and compression float reduces tap breakage and compensates for feed rate mismatch
• Wide tap capacity range: M3.5 to M36 (No. 6 to 1-5/8 inch)
• Pipe tap capability from 1/16 inch to 1-1/4 inch
• 4.85-inch projection accommodates deep-hole and recessed-feature tapping
• 2.31-inch nose diameter provides a robust, rigid chuck body

Compatibility

Designed for machining centers with a CAT40 taper spindle interface. Compatible with taps from M3.5 (No. 6) through M36 (1-5/8 inch) and pipe taps from 1/16 inch through 1-1/4 inch when used with the appropriate tap adapter collets.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing the chuck. Use a calibrated torque wrench and follow the machine tool builder's draw bar torque specification when seating the CAT40 taper. Inspect the taper bore and spindle taper for chips, nicks, or contamination before assembly, as surface defects will affect runout and tap life.