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Description
Technical data for the ER20 Ø2 mm collet
| Technical Data | |
|---|---|
| Bore Diameter d | 2-1 mm |
| Outside Diameter D | 21 mm |
| Overall Length L | 31.5 mm |
ER20 2 mm collet – precision clamping of micro diameters with the extended tolerance of the ER20 system
The ER20 collet in the 1-2 mm range is a solution designed for micromachining, combining the stability of a larger system with the ability to clamp the smallest tool diameters. Hardened 65Mn steel with a hardness of 44-48 HRC and precision manufacturing in accordance with DIN 6499B ensure maximum radial runout of 0.015 mm while maintaining positioning repeatability. The 0.9 mm collapse range exceeds the capabilities of smaller systems, eliminating the need for collets for every hundredth of a millimeter.
Key advantages of the ER20 2 mm collet
- Maximum radial runout of 0.015 mm in accordance with DIN 6499B – the accuracy required for engraving precision components and milling microstructures
- Clamping range 1-2 mm with a collapse range of 0.9 mm – flexibility exceeding the ER11 system by 80 percent while maintaining the same accuracy grade
- ER20 system dimensions of 21×31 mm – increased mass compared with ER11 effectively damps vibration at speeds exceeding 20000 rpm
- 65Mn material hardened to 44-48 HRC – retention of elastic properties throughout the service life under cyclic loads
- Compliance with DIN 6499B and ISO 15488-B standards – universal interchangeability with chucks from renowned machine tool manufacturers
Ideal for clamping micro end mills, precision drills, diamond engraving tools, and countersinks used in machining electronic components, jewelry parts, and model-making components. For such small diameters, the ER20 system offers the advantage of increased mechanical stability over the compact ER11, resulting in better surface quality at high spindle speeds. Used with aluminum, engineering plastics, and soft nonferrous metals, where dimensional precision determines the functionality of the finished component. Chosen by shops requiring a combination of accuracy and reliability during prolonged service.
Frequently asked questions
It is used to secure micro end mills, precision drills with 1-2 mm shanks, diamond engraving tools, and countersinks used in jewelry making and electronics. A tolerance of 0.9 mm reduces the need to stock separate collets for every tenth of a millimeter of diameter.
The ER20 design features greater mass that absorbs vibration more effectively during operation at high spindle speeds, directly affecting surface finish quality. Its 0.9 mm collapse range exceeds the capabilities of ER11, which offers only 0.5 mm, by 80 percent, increasing application versatility.
The compact ER11 model measures 11.5×18 mm, the common ER16 has a size of 17×28 mm, the medium-sized ER20 is specified as 21×31 mm, the reinforced ER32 version measures 33×40 mm, while the most robust ER40 has dimensions of 41×46 mm. Each collet has an engraved system designation that meets the requirements of DIN 6499B.
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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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