Techniks 31/12-4158 Tap Collet Ansi 2 0.48 Inch

Product Description

The TECHNIKS 31/12-4158 is an ANSI Series 2 tap collet designed to secure hand taps in compatible tap holders and tapping attachments. With a collet size of 0.48 inches and a square drive size of 0.36 inches, this collet provides a firm, repeatable grip on 5/8-inch hand taps during threading operations. It is a precision-machined toolholding component used in manual and machine tapping applications across metalworking, fabrication, and maintenance environments. Licensed machinists and tool and die technicians are the typical end users for this type of collet.

This collet is suited for hand tap applications where consistent tap alignment and secure seating are critical to thread quality. It is compatible with ANSI 2 tap holder systems and is intended for use without through-coolant capability. The design does not include tension-compression float, making it appropriate for rigid tapping setups where the tap collet provides direct, fixed drive engagement.

Key Features

• ANSI Series 2 collet standard for compatibility with ANSI 2 tap holder bodies
• 0.48-inch collet size accommodates 5/8-inch hand taps
• 0.36-inch square drive size for positive tap engagement
• Hand tap configuration - not rated for pipe taps
• No through-coolant passages, suited for dry or flood-coolant setups
• Rigid drive design without tension-tap float

Compatibility

Designed for use with ANSI 2 series tap holders accepting a 0.48-inch collet bore and 0.36-inch square drive. Intended for hand tap tooling applications per ANSI collet standards.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the tap holder and spindle are fully de-energized and the machine is in a safe, locked-out state before seating or removing the collet. Inspect the collet bore and mating tap holder for chips or wear before assembly. Do not exceed the rated collet size - using an undersized or oversized tap shank will compromise grip and thread quality.