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Description
Technical data for the ER20 Ø10 mm collet
| Technical Data | |
|---|---|
| Bore Diameter d | 10-9 mm |
| Outside Diameter D | 21 mm |
| Overall Length L | 31.5 mm |
ER20 10 mm collet – reinforced clamping for common diameters with a tolerance of 0.9 mm
The ER20 collet with a clamping range of 9-10 mm combines the versatility of the most common tool diameters with the strength of a medium-sized collet system. Hardened 65Mn steel construction with a hardness of 44-48 HRC and precision manufacture to DIN 6499B guarantee a maximum radial runout of 0.015 mm. The 0.9 mm collapse range eliminates the need to stock separate collets for 9 mm and 10 mm tools.
Key advantages of the ER20 10 mm collet
- Maximum radial runout of 0.015 mm – ensures dimensional repeatability when milling contours and drilling precision holes
- Clamping range of 9-10 mm with a 0.9 mm collapse range – the wide clamping tolerance reduces the number of sizes needed in the workshop
- ER20 system dimensions (21×31 mm) – greater mass damps vibration more effectively than ER16, extending cutting edge life
- 65Mn steel hardened to a consistent hardness of 44-48 HRC – the material retains its elastic properties through tens of thousands of cycles
- Manufactured to DIN 6499B and ISO 15488-B – full interchangeability with holders from manufacturers of milling machines and CNC machining centers
Suitable for machining structural steels, aluminum alloys, and engineering plastics. The 10 mm diameter is standard for plain milling cutters and end mills in machine shops, making this collet an essential item of equipment. The ER20 system provides greater connection rigidity than ER16 while maintaining compact dimensions compared with ER32. Selected by professionals who value reliability in batch and single-part production.
Frequently asked questions
It secures plain milling cutters and end mills, twist drills, countersinks, and taps intended for machine use in the 9-10 mm diameter range. This is the most common size in workshop applications.
The use of hardened 65Mn steel and precision manufacture guarantees full retention of elastic properties through tens of thousands of clamping operations. With regular use and proper maintenance, the collet provides many years of service.
The ER20 system has a 0.9 mm collapse range (slightly smaller than the 1 mm of ER16), but offers greater clamping rigidity and greater component mass, providing better stability during operations under high loads.
The compact ER11 measures 11.5×18 mm, the popular ER16 measures 17×28 mm, the medium-sized ER20 measures 21×31 mm, the reinforced ER32 measures 33×40 mm, and the largest ER40 measures 41×46 mm. The system identification is engraved on the body of each collet in accordance with 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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