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Description
Technical data for ER25 Ø8 mm collets
| Technical Data | |
|---|---|
| Hole diameter d | 8-7 mm |
| Outside diameter D | 26 mm |
| Overall length L | 34 mm |
ER25 8 mm collet – precision clamping of common diameters in a system with optimal vibration damping
The ER25 collet with a 7-8 mm range enables secure clamping of tools with one of the most common shank diameters in a system featuring reinforced construction. Hardened 65Mn steel construction with a hardness of 44-48 HRC in accordance with DIN 6499 ensures a maximum radial runout of 0.015 mm. The 1 mm collapse range guarantees a wide range of tool compatibility unavailable in compact systems.
Key advantages of the ER25 8 mm collet
- Radial runout not exceeding 0.015 mm in accordance with DIN 6499 – positioning accuracy essential for precision milling and drilling of demanding components
- Clamping range of 7-8 mm with a tolerance of 1 mm – a wide collapse range allowing tools with slightly different shank diameters to be mounted
- Dimensions of 26×34 mm providing optimal mass – effective vibration absorption during intensive machining with medium-diameter tools
- 65Mn spring steel hardened to 44-48 HRC – durability guaranteeing stable clamping properties over many years of service
- Compliance with ISO 15488 – universal interchangeability with holders from reputable toolholding system manufacturers
The collet is designed to secure end mills, twist drills, machine taps, and reamers used to machine structural steels, aluminum alloys, and engineering plastics. The 8 mm diameter is among the standard shank sizes offered by most cutting tool manufacturers on the market. The ER25 system, with a 26×34 mm design, provides greater mechanical rigidity than the compact ER11 and ER16 systems, resulting in more stable operation at increased cutting parameters. A proven solution for manufacturing plants machining medium-sized industrial parts.
Frequently asked questions
It holds end mills, twist drills, machine taps, reamers, and other tools with straight shanks in the 7-8 mm range. A tolerance of 1 mm provides flexibility in fitting shanks with slightly different dimensions.
The ER25 design, measuring 26×34 mm, has greater mass and rigidity than ER20 (21×31 mm). The more substantial construction dampens vibration more effectively during machining, improving surface finish quality and extending the life of the tools used.
The compact ER11 measures 11.5×18 mm, the standard ER16 measures 17×28 mm, the versatile ER20 measures 21×31 mm, the intermediate ER25 measures 26×34 mm, the heavy-duty ER32 is identified by its 33×40 mm dimensions, and the large ER40 measures 41×46 mm. The system symbol is marked on the collet body in accordance with the requirements of DIN 6499.
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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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