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Description
Technical data for ER40 Ø5 mm collets
| Technical data | |
|---|---|
| Hole diameter d | 5-4 mm |
| Outside diameter D | 41 mm |
| Overall length L | 46 mm |

ER40 5 mm collet – a solid foundation for working with small tools
The ER40 Ø5 mm collet is a small size in the ER40 clamping system, offering the advantages of a large holder when machining with small-diameter tools. Made from 65Mn spring steel hardened to 44-48 HRC, it provides stable clamping of end mills, standard drills, and precision reamers with a 5 mm shank.
Main benefits of the ER40 Ø5 mm collet
- Minimal radial runout – the robust construction of the ER40 system eliminates vibration and ensures concentricity even with small tools
- Durable 65Mn spring steel – a hardness of 44-48 HRC ensures consistent clamping performance throughout the service life
- Manufactured in accordance with DIN 6499 – full interchangeability with ER40 holders and nuts from all leading manufacturers
- Clamping range 5-4 mm – a tolerance of 1 mm allows tools with similar shank diameters to be held
- Versatility in applications – ideal for finish milling, precision drilling, and machining parts with tight tolerances
ER40 5 mm collet combines the ability to work with small tools with the stability of an industrial clamping system. Recommended for toolrooms performing precision work, mold manufacturing facilities, and CNC shops requiring high repeatability. Choose the ER40 collet – secure clamping regardless of tool diameter.
Frequently asked questions
ER40 collets allow tools with straight shanks in the 3-26 mm range to be clamped. Each size offers a clamping tolerance of 1 mm, increasing flexibility in tooling selection.
Insert the collet into the nut at an angle, engage its groove with the eccentric lip, and press until it clicks into place. Then fit the nut onto the tool holder and tighten it to the recommended torque using the dedicated wrench.
ER system sizes differ in 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 marked 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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