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Description
Technical data for the ER20 Ø1 mm collet
| Technical Data | |
|---|---|
| Bore Diameter d | 1 to 0.5 mm |
| Outside Diameter D | 21 mm |
| Overall Length L | 31.5 mm |
ER20 1 mm collet – professional clamping of the smallest diameters in a system for medium-sized tools
The ER20 collet with a range of 0.5-1 mm is the smallest size in a system designed for medium-sized and larger tools. Hardened 65Mn steel with a hardness of 44-48 HRC and manufacture in accordance with DIN 6499B ensure a maximum radial runout of 0.015 mm in a reinforced design. A collapse range of 0.9 mm combines small-diameter precision with the mechanical strength of the larger ER20 system.
Key advantages of the ER20 1 mm collet
- Radial runout accuracy ≤0.015 mm – ensures stability during engraving and machining of precision parts
- Clamping range of 0.5-1 mm with a 0.9 mm collapse range – eliminates the need for multiple sizes for micro diameters
- Reinforced ER20 system design – greater mass (21×31 mm) effectively reduces vibration at high rotational speeds
- Hardened 65Mn steel with a hardness of 44-48 HRC – resistance to permanent deformation during repeated clamping
- Compliance with DIN 6499B and ISO 15488-B standards – universal compatibility with tool holders from leading manufacturers
It is used for precision engraving, milling electronic parts, and drilling micro holes in aluminum and plastics. The ER20 system offers greater rigidity than the compact ER11 and ER16 systems, resulting in better process stability during micromachining that requires high rotational speeds. Professionals choose ER20 for tasks combining small-diameter precision with production requirements for durability and repeatability.
Frequently asked questions
It is used to secure micro milling cutters, precision drills, engraving tools with diamond inserts, and countersinks with shank diameters from 0.5 to 1 mm. Ideal for applications in the electronics and jewelry industries.
Choosing ER20 provides greater rigidity due to the system dimensions (21×31 mm compared with 11.5×18 mm), more effective vibration damping thanks to the greater component mass, and a 80 percent wider compensation range (0.9 mm vs. 0.5 mm in ER11).
The use of hardened 65Mn steel with a hardness of 44-48 HRC ensures that elastic properties are maintained through tens of thousands of clamping operations. With regular use and proper maintenance, the collet provides many years of service without loss of performance.
The compact ER11 has dimensions of 11.5×18 mm, the popular ER16 measures 17×28 mm, the reinforced ER20 has a size of 21×31 mm, the medium-sized ER32 measures 33×40 mm, and the largest ER40 is 41×46 mm. Each collet has an engraved system identification 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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