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Description
Technical data for ER40 Ø4 mm collets
| Technical data | |
|---|---|
| Hole diameter d | 4-3 mm |
| Outside diameter D | 41 mm |
| Overall length L | 46 mm |
ER40 collet 4 mm – industrial system rigidity for small-diameter tools
The ER40 Ø4 mm collet is a compact size in the ER40 clamping system that uses the stability of a large holder for precise work with small tools. Manufactured from 65Mn spring steel with a hardness of 44-48 HRC, it guarantees reliable clamping of small end mills, precision drills, and miniature countersinks with a 4 mm shank.
Key advantages of the ER40 collet Ø4 mm
- Vibration reduction through robust construction – the large ER40 system provides exceptional rigidity even when working with small tools
- High-grade 65Mn spring steel – hardening to 44-48 HRC guarantees long service life and stable clamping performance
- Manufactured to DIN 6499 – universal compatibility with ER40 holders and nuts from leading manufacturers
- Clamping range of 4-3 mm – an allowance of 1 mm permits clamping of tools with similar shank diameters
- Precision machining applications – suitable for engraving, electronics manufacturing, and finishing parts with demanding requirements
ER40 4 mm collet allows you to use the potential of the ER40 system in operations requiring small cutting tools. Recommended for precision machining facilities, electronic component manufacturers, and toolrooms specializing in miniature parts. Invest in the ER40 collet – a stable foundation for precision machining.
Frequently asked questions
The ER40 system allows clamping of tools with straight shanks in the 3-26 mm range. Each size has a clamping allowance of 1 mm, increasing versatility in use.
Insert the collet into the nut at an angle, engage the groove with the eccentric projection, and press until it clicks into place. Then fit the nut onto the holder and tighten it to the recommended torque with the dedicated wrench.
ER sizes are distinguished by their external dimensions: ER11 measures 11.5×18 mm, ER16 measures 17×28 mm, ER20 measures 21×31 mm, ER25 measures 26×34 mm, ER32 measures 33×40 mm, and ER40 measures 41×46 mm. The size is printed on the body in accordance with DIN 6499.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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