Techniks 04894 Mini-er ER20 Collet Chuck Straight Shank

Product Description

The TECHNIKS 04894 is a Mini-ER collet chuck with a straight shank, designed for use with the ER20 collet series. It provides a 140 mm (5.512 inches) projection from the spindle face and an overall length of 7.087 inches. The 3/4-inch straight shank fits standard toolholding setups on CNC machining centers, mills, and similar machine tools. This chuck accepts ER20 collets ranging from 1/16 inch to 1/2 inch in capacity, making it a versatile option for light to medium-duty drilling, reaming, and milling operations. It is intended for use by machinists and toolroom professionals working with precision cutting applications.

This collet chuck is suited for CNC milling machines, machining centers, and manual mills where a straight shank interface is specified. The extended 140 mm projection is useful in applications requiring reach into deep cavities or fixtures where standard-length holders cannot access the workpiece. The ER20 collet system is a widely used standard, and this chuck is compatible with the full range of ER20 collets within the stated capacity range of 1/16 inch to 1/2 inch.

Key Features

• ER20 collet series compatibility with collet capacity range from 1/16 inch to 1/2 inch
• 140 mm (5.512 inches) projection for extended reach applications
• 3/4-inch straight shank for standard machine spindle interfaces
• Overall length of 7.087 inches for consistent tool length management
• Mini-ER collet system design for compact, precise toolholding

Compatibility

Designed for use with ER20 series collets in straight shank toolholding applications on CNC and manual milling machines that accept a 3/4-inch straight shank interface.

Installation Notes

Installation and removal should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing this chuck. Use the appropriate ER20 collet nut wrench and spanner to achieve proper clamping torque per the machine tool manufacturer specifications. Inspect the shank and collet bore for chips or damage before each installation.