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Description
Technical data for the ER20 Ø13 mm collet
| Technical Data | |
|---|---|
| Bore Diameter d | 13-12 mm |
| Outside Diameter D | 21 mm |
| Overall Length L | 31.5 mm |
ER20 13 mm collet – maximum diameter in a system with an extended 0.9 mm collapse range
The ER20 Ø13 mm collet is the largest size in the standard ER20 system range, allowing precise clamping of tools with 12-13 mm shanks. Hardened 65Mn steel with a hardness of 44-48 HRC and manufacturing in accordance with DIN 6499B guarantee radial runout no greater than 0.015 mm while maintaining full dimensional repeatability. The 0.9 mm collapse range allows flexible accommodation of tools with slightly different shank diameters.
Key advantages of the ER20 13 mm collet
- Maximum runout of 0.015 mm in accordance with DIN 6499B – precision that eliminates errors when machining parts with tight dimensional tolerances
- Clamping range of 12-13 mm with a tolerance of 0.9 mm – versatility that reduces the cost of stocking dedicated collets for each diameter
- ER20 system dimensions of 21×31 mm – mechanical stability exceeding that of compact systems at increased torque
- 65Mn steel hardened to a hardness of 44-48 HRC – material that retains its elastic properties throughout its service life
- Compliance with international ISO 15488-B standards – full interchangeability with holders from leading CNC machine tool manufacturers
The ER20 system with a 13 mm diameter is suitable for clamping shank-type and cylindrical milling cutters, twist drills, machine taps, and countersinks used to machine structural steels, aluminum alloys, and engineering plastics. The greater mass of the collet compared with smaller systems effectively reduces vibration amplitude at speeds above 12000 rpm, extending the life of both the tool holder and the cutting tool. Chosen by machine shops requiring a reliable connection across a variety of machining operations.
Frequently asked questions
It is used to clamp shank-type milling cutters, drills, machine taps, countersinks, and any tools with a straight shank diameter between 12 and 13 mm. It represents the upper limit of the standard ER20 system range.
Manufacturing in accordance with DIN 6499B and ISO 15488-B ensures trouble-free compatibility with tool holders from any manufacturer using the ER20 standard. The external dimensions of 21×31 mm are common to all components of this system.
The smallest ER11 system 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. Manufacturers mark the system designation directly on the collet surface in accordance with 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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