Value Collection 230-4140 5C Round Steel Collet 5/8 Inch

Product Description

The VALUE COLLECTION 230-4140 is a 5C-style round steel collet designed for use in lathes, collet chucks, and other 5C-compatible workholding equipment. It holds round stock at a nominal 5/8 inch diameter with a total indicated runout (TIR) of 0.0005 inches, making it suitable for precision turning, milling, 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. The collet is machined from steel for durability under repeated clamping cycles. Machinists and tool room technicians install these collets in production and job shop environments where consistent workpiece concentricity is required.

This collet is appropriate for use in manual and CNC lathes, rotary indexing fixtures, and collet-closer systems that accept the 5C collet standard. It is suited to both production runs and one-off precision parts where maintaining tight runout tolerances is critical. A typical install scenario involves securing round bar stock or finished-diameter workpieces for secondary operations such as facing, threading, or light grinding.

Key Features

• 5/8 inch nominal round collet size for common bar stock and finished-diameter work
• 0.0005 inch TIR for precision concentricity in turning and grinding applications
• Internal thread: 1.041 inches at 24 threads per inch
• External thread: 1.242 inches at 20 threads per inch
• Steel construction for durability under repeated clamping and release cycles
• 5C-standard profile compatible with a wide range of workholding equipment

Compatibility

Designed as an OEM-style replacement or direct-fit collet for workholding equipment that accepts the industry-standard 5C collet format.

Installation Notes

Installation is performed by machinists or tool room technicians. Before inserting or removing a collet, ensure the machine spindle is fully stopped and all energy sources are locked out per shop safety procedures. Threads should be clean and free of chips before seating the collet in the closer or chuck body. Do not overtighten the collet closer, as excessive force can deform the collet bore and compromise runout performance.