Value Collection 1230-4240 5C Round Collet 21.50mm

Product Description

The VALUE COLLECTION 1230-4240 is a 5C round collet machined from steel, designed for use in 5C-compatible collet chucks, collet closers, and indexing fixtures found on lathes, milling machines, and grinding equipment. This collet accepts round workpieces at a nominal collet size of 21.50mm and maintains a total indicator runout (TIR) of 0.015mm, supporting accurate, repeatable workholding for turning and grinding operations. The internal thread measures 1.041 inches at 24 threads per inch, and the external thread measures 1.242 inches at 20 threads per inch. Machinists and toolroom professionals install this collet as a standard workholding component in production and job-shop environments.

This 5C round collet is suited for use in manual and CNC lathes, rotary indexers, and collet fixtures that accept the standard 5C collet form. It is appropriate for both production runs and prototype work where consistent round-stock gripping is required. The steel construction provides durability under repeated clamping cycles. It is a practical replacement or additional collet for shops maintaining a full set of 5C sizes.

Key Features

• 21.50mm collet size for gripping round workpieces
• TIR of 0.015mm supports accurate, repeatable workholding
• Steel construction for durability under repeated clamping cycles
• Internal thread: 1.041 inches-24 for standard 5C closer compatibility
• External thread: 1.242 inches-20 for standard 5C chuck compatibility
• Lightweight at 0.5 pounds for easy handling and tool changes

Compatibility

Designed as a standard-form 5C round collet for use in any 5C-compatible collet chuck, collet closer, or indexing fixture that accepts the 5C collet form factor.

Installation Notes

A qualified machinist should install this collet. Before installation, power down and lock out the machine spindle per standard OSHA lockout/tagout procedures. Inspect the collet bore and chuck taper for chips or burrs before seating the collet, as debris will increase runout and accelerate wear. Do not exceed the workpiece size range for which this collet is rated, as overloading will damage the collet and reduce gripping accuracy.