4mm ER16-GB Collet With 3mm Internal Square For Thread Cutting, 15 µm Runout - TECWERK

Take advantage of precise clamping, DIN 6499 compatibility and a compact design to improve threading and tapping workflows. The combination of 15 µm runout accuracy, a Ø 4 mm clamping diameter and an internal 3 mm square ensures consistent results and reliable tool engagement; order supply or consult Metav Werkzeuge for product matching and delivery.

ER16-GB collet (ER 16-GB) — compact Ø 4 mm collet for thread cutting, TECWERK

The ER16-GB collet is a compact clamping sleeve for thread-cutting and general ER-holder applications, designed to accept a 4 mm diameter shank and an internal 3 mm square for tapping operations.

• DIN 6499 compliant with internal square
• 15 µm runout accuracy
• Clamping diameter Ø 4 mm, internal square 3 mm
• Compact length 27.5 mm for tight setups

Reliable precision for thread-cutting and tapping operations

The ER16-GB collet delivers consistent clamping performance where positional accuracy matters. Its 15 µm runout accuracy minimises wobble during rotation, which reduces tool wear and improves thread quality — a direct benefit for production runs and repair tasks that demand repeatable outcomes. Compliance with DIN 6499 indicates standardised dimensions for collet-type tools, ensuring predictable fitment in ER chucks and thread-cutting spindles. For workshop planning, this means fewer setup iterations and steadier part quality.

Compact dimensions that simplify tight machine setups

With a length of 27.5 mm, a clamping diameter of 4 mm and an internal 3 mm square, the collet suits confined toolholders and short overhang requirements. The small footprint helps maintain stiffness in the tool assembly, which is essential when working in compact lathes or milling heads. The mechanical design concentrates clamping force around the shank, improving repeatability and enabling reliable torque transmission during tapping or when using small-diameter tooling.

Seamless integration with ER chucks and tapping equipment

Engineered as an ER-type accessory, the collet fits ER chucks and thread-cutting collet holders designed for ER systems, making it straightforward to integrate into existing clamping setups. The internal square allows secure engagement of taps and square-drive accessories intended for thread cutting. Where line-side efficiency is important, the ability to use a standard ER retention system reduces inventory complexity and speeds up tool changes.

Practical benefits for workshop and industrial use

The design supports consistent production and maintenance tasks by reducing the variables that lead to scrap or rework. The combination of standard compliance, well-defined dimensions and measured runout improves process reliability and lowers inspection effort. For precision-focused environments, the collet helps maintain quality across batches, contributing to steadier throughput and less downtime for readjustment.

Contact Metav Werkzeuge to arrange supply, confirm compatibility or obtain tailored technical advice for the TECWERK ER16-GB collet (SKU 2000834955NW) and ensure the right clamping solution for the application

Technical data

• Article number: 2000834955NW
• Item: ER16-GB collet, clamping Ø 4 mm, internal square 3 mm, TECWERK
• Type: ER 16-GB
• Manufacturer: TECWERK

Core data

• Clamping range: 4 mm
• Clamping diameter (d): 4 mm
• Length (L): 27.5 mm
• Internal square: 3 mm
• Runout accuracy: 15 µm
• Packaging unit: 1

Special features

• DIN 6499 with internal square for thread cutting
• Suitable for thread-cutting and ER clamping chucks
• Designed for compact toolholder setups

FAQ

Is the ER16-GB collet suitable for standard ER chucks?
The ER16-GB collet is designed for compatibility with ER-type chucks and thread-cutting collet holders, providing standardised fit and interchangeability in ER systems.

What does 15 µm runout accuracy mean for machining quality?
A runout of 15 µm indicates small radial deviation during rotation; the ER16-GB collet’s accuracy helps improve thread finish and tool life by reducing vibration and uneven cutting loads.

Can the collet be used directly for tapping with square-drive taps?
Yes — the internal 3 mm square permits secure engagement of taps with a matching square drive, making the collet suitable for many tapping operations in threading applications.

What are the key dimensions to check before ordering?
Verify the clamping diameter 4 mm, length 27.5 mm and internal square 3 mm to ensure fitment in the intended ER chuck and compatibility with the tooling.

Which SKU identifies this specific collet?
This collet is listed under SKU 2000834955NW and is the ER16-GB variant from TECWERK.

Manufacturer / Responsible: NORDWEST Handel AG, Robert-Schuman-Straße 17, 44263 Dortmund