Techniks 04210IS* ER20 Collet Set 12 Pc 1/2 in

Product Description

The TECHNIKS 04210IS* is a 12-piece ER20 collet set designed for use in ER20-compatible toolholders on CNC machining centers, manual mills, and other rotating spindle equipment. The set covers a range of bore sizes in increments of 0.0312 inches, with a maximum collet capacity of 1/2 inch. Each collet in the set is manufactured to ER system standards, providing consistent clamping force and accurate tool runout for precision machining operations. Machinists and toolroom technicians rely on sets like this to cover a broad range of shank diameters without purchasing individual collets.

This collet set is suited for light to medium-duty milling, drilling, tapping, and reaming applications in both production and job-shop environments. The ER20 series is one of the most widely used collet standards in the industry, making this set a practical addition to any CNC or manual machine tool setup. The stepped size increments allow the set to accommodate a wide range of metric and fractional tool shanks within its capacity range.

Key Features

• 12-piece set covering ER20 bore sizes in 0.0312-inch increments up to 1/2 inch capacity
• ER20 collet system - compatible with standard ER20 toolholders
• Stepped increments allow coverage of a broad range of tool shank diameters
• Designed for CNC machining centers, manual mills, and rotating spindle applications
• Complete set reduces the need for individual collet sourcing across common shank sizes

Compatibility

Designed for use with standard ER20-series collet toolholders used in CNC machining centers, manual milling machines, and other spindle equipment accepting the ER20 collet system.

Installation Notes

Installation and collet changes should be performed by a qualified machinist or toolroom technician with the spindle fully stopped and machine power isolated. Collets should be seated properly in the toolholder nut before tightening, and the nut should be torqued using the appropriate ER collet wrench per the toolholder manufacturer guidance. Inspect each collet for chips, burrs, or wear before use. Do not exceed the stated maximum clamping capacity of 1/2 inch for this collet series.