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Description
Technical data for the ER20 Ø11 mm collet
| Technical Data | |
|---|---|
| Bore Diameter d | 11-10 mm |
| Outside Diameter D | 21 mm |
| Overall Length L | 31.5 mm |
ER20 11 mm collet – precise clamping of medium-sized tools
The ER20 collet with a clamping range of 10-11 mm is designed for tools with medium shank diameters that require stable clamping during intensive use. Hardened 65Mn steel with a hardness of 44-48 HRC and manufacture in accordance with DIN 6499B ensure radial runout does not exceed 0.015 mm. The 0.9 mm collapse range allows tools with slightly different dimensions to be used without changing the collet.
Key advantages of the ER20 11 mm collet
- Radial runout accuracy ≤0.015 mm – guarantees surface quality and dimensional tolerances in finishing operations
- Flexible range of 10-11 mm with a tolerance of 0.9 mm – versatile clamping reduces inventory costs and simplifies logistics
- Reinforced ER20 system design – dimensions of 21×31 mm provide greater rigidity than the compact ER16
- 65Mn material hardened to 44-48 HRC – resistance to deformation during repeated clamping operations
- Full compliance with DIN 6499B and ISO 15488-B – guaranteed compatibility with holders from reputable machine tool manufacturers
Used for milling structural steels, machining aluminum alloys, and drilling engineering plastics. The 11 mm diameter is a popular size for milling cutters used to machine medium-sized parts and drills for holes with higher quality requirements. The greater mass of the ER20 system compared with ER16 effectively dampens vibration at speeds above 15000 rpm, extending cutting tool life. Professionals appreciate process repeatability and the minimal need for operator intervention.
Frequently asked questions
The collet is used for both rough and finish milling, high-precision hole drilling, reaming, and countersinking. It accommodates tools with shank diameters from 10 to 11 mm for machining on CNC machining centers.
Hardened 65Mn steel with a hardness of 44-48 HRC and precision manufacturing ensure that elastic properties are maintained through tens of thousands of clamping operations. With regular use and proper maintenance, the collet operates for many years without deterioration of its properties.
The ER20 system features greater component mass for more effective vibration reduction and increased clamping rigidity. Although the 0.9 mm collapse range is similar to the 1 mm range in ER16, the ER20 design provides better stability under high cutting loads.
The smallest ER11 measures 11.5×18 mm, the compact ER16 measures 17×28 mm, the medium-sized ER20 measures 21×31 mm, the reinforced ER32 measures 33×40 mm, and the largest ER40 system measures 41×46 mm. The system identifier 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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