Value Collection 530-4240 5C Square Collet 5/8 Inch

Product Description

The VALUE COLLECTION 530-4240 is a 5C-style square collet machined from steel, designed for use in 5C-compatible collet chucks, collet closers, and indexing fixtures on lathes and rotary tables. This collet holds 5/8-inch square stock and delivers a TIR (total indicator runout) of 0.0005 inches, providing the concentricity and repeatability that precision turning and milling operations demand. The internal thread measures 1.041 inches-24 and the external thread measures 1.242 inches-20, conforming to the standard 5C thread specification. Machinists and toolroom technicians install this collet when switching from round-bore work holding to square-stock clamping without changing the spindle nose configuration.

This collet is suited for production turning, second-operation work, and toolroom use on manual lathes, CNC lathes, and rotary indexing setups that accept the 5C collet standard. The square bore is intended for bar stock, blanks, or workpieces with a 5/8-inch square cross-section. It is a practical choice wherever consistent clamping force and accurate part location on square stock are required across repeat-run operations.

Key Features

• Square bore sized for 5/8-inch square stock
• TIR of 0.0005 inches for precision, repeatable work holding
• Internal thread: 1.041 inches-24 (standard 5C specification)
• External thread: 1.242 inches-20 (standard 5C specification)
• Steel construction for durability under production clamping loads
• Compatible with the widely used 5C collet system — no spindle-nose modification required

Compatibility

Designed as a standard 5C-pattern replacement or addition for any lathe, collet closer, collet chuck, or rotary fixture that accepts 5C collets with the 1.041 inches-24 internal and 1.242 inches-20 external thread specification.

Installation Notes

Installation and removal should be performed by a qualified machinist with the spindle at rest and all machine power isolated. Collet threads and the collet closer or chuck nose should be inspected for damage or contamination before seating the collet. Do not exceed the clamping torque appropriate for the collet closer being used, and never use a collet to grip stock that is oversized relative to the rated bore. Reference the machine manufacturer's documentation for draw-tube and closer setup procedures.