Value Collection 230-4218 5C Round Collet 18mm

Product Description

The VALUE COLLECTION 230-4218 is a 5C round collet machined from steel, designed for use in 5C-compatible spindles, collet closers, and indexing fixtures found on lathes, rotary tables, and grinding machines. The collet measures 18.00 mm in collet size and holds a Total Indicator Runout (TIR) of 0.015 mm, making it suitable for applications where concentricity matters. The internal thread is 1.041 inches at 24 threads per inch, and the external thread is 1.242 inches at 20 threads per inch. It weighs 0.52 pounds. This part is installed by machinists and toolroom technicians in production and job-shop environments.

The 230-4218 is used in standard 5C collet systems across manual and CNC lathes, milling machines with 5C spindle adapters, and bench-top indexing heads. It is well suited for holding round workpieces during turning, drilling, and grinding operations in light manufacturing and precision machining settings. The steel construction provides durability under repeated clamping cycles in both low-volume toolroom work and moderate-production runs.

Key Features

• 5C round collet format fits standard 5C spindles and collet closers
• 18.00 mm collet size for round workpiece holding
• TIR of 0.015 mm supports concentricity-sensitive operations
• Steel construction for durability under repeated clamping cycles
• Internal thread: 1.041 inches-24; external thread: 1.242 inches-20
• Lightweight at 0.52 pounds for easy handling and quick changeovers

Compatibility

Designed as a standard 5C-style replacement or additional collet for any machine tool equipped with a 5C collet spindle or closer.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing the collet. Ensure the collet nose, closer threads, and spindle bore are clean and free of chips or burrs before seating the collet, as debris will directly affect runout. Do not overtighten the closer; follow the machine manufacturer's torque guidelines for the specific collet closer in use.