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Description
Technical data for the ER40 Ø21 mm collet
| Technical data | |
|---|---|
| Hole diameter d | 21-20 mm |
| Outside diameter D | 41 mm |
| Overall length L | 46 mm |
ER40 21 mm collet – efficient clamping for machining large components
The ER40 Ø21 mm collet is an advanced component of the ER40 system, designed for professional use with tools with large straight shank diameters. Made from 65Mn spring steel hardened to 44-48 HRC, it offers stable, repeatable clamping of milling cutters, drills, countersinks, and specialized tools with a 21 mm shank diameter.
Benefits of the ER40 collet Ø21 mm
- Optimal torque transmission – heavy-duty construction ensures a secure grip during intensive cutting at high operating parameters
- Premium-grade hardened 65Mn steel – a hardness of 44-48 HRC guarantees consistent elastic properties over a long service life
- Manufactured to DIN 6499 – full interchangeability with ER40 nuts and tool holders from various suppliers
- Clamping range of 21-20 mm – a tolerance of 1 mm allows flexible selection of tools with similar shank sizes
- Designed for special applications – ideal for CNC milling machines, multi-axis machining centers, and mold and die machining equipment
ER40 21 mm collet is the size chosen for operations requiring tools with large cross sections and high system rigidity. Recommended for machinery manufacturers, professional toolrooms, and maintenance departments. Choose an ER40 collet and ensure trouble-free operation on the most demanding projects.
Frequently asked questions
The ER40 system allows clamping of straight-shank tools with diameters in the 3-26 mm range. Each size has a clamping range of 1 mm, ensuring versatility in use.
Insert the collet into the nut at an angle, engage its groove with the eccentric lip, and press until it clicks into place. After fitting the nut onto the tool holder, tighten it to the recommended torque using the dedicated wrench.
Individual sizes are identified 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. Each collet is marked 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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