Value Collection 52100499 5C Emergency Collet Nylon

Product Description

The VALUE COLLECTION 52100499 is a 5C emergency collet designed for use in manual and CNC lathe workholding applications where standard collets cannot grip non-standard or irregular stock. Constructed from nylon, this collet features three clips that allow the user to bore the collet to a custom internal diameter in the field, accommodating workpieces that fall outside standard collet size ranges. Total indicated runout (TIR) is 0.00315 inches, providing acceptable concentricity for emergency turning and finishing operations. This part is installed by machinists and toolroom technicians working on 5C-compatible spindles and fixtures.

This emergency collet is suited for job shop, production, and toolroom environments where a non-standard workpiece diameter must be turned or finished without delay. The nylon construction allows the collet to be bored to size on the machine, making it a practical solution when a standard ground steel collet is not available for the required diameter. It is used in both manual lathes and 5C-compatible collet chucks, indexers, and rotary fixtures across light manufacturing and maintenance machining operations.

Key Features

• Emergency-style collet bores to custom ID in the field for non-standard workpiece diameters
• Three-clip design provides controlled grip and flex during boring and workholding
• Nylon construction allows clean, precise in-machine boring without damaging the spindle
• TIR of 0.00315 inches for acceptable concentricity in emergency turning operations
• Internal thread size of 1.041 inches-24 and external thread size of 1.242 inches-20 for standard 5C compatibility
• Lightweight at 0.1 pounds, easy to handle and store in a toolroom environment

Compatibility

Designed as an OEM-style replacement and standard fitment for 5C-compatible lathe spindles, collet chucks, indexers, and rotary fixtures accepting a 1.242 inches-20 external thread size.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Before mounting the collet, ensure the lathe or collet chuck spindle is fully powered down and locked out per facility lockout/tagout procedures. Bore the collet to the required internal diameter using a finish boring operation on the machine in which it will be used to ensure concentricity. Do not exceed the collet's grip range after boring, as over-boring will compromise workholding integrity.