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Description
Technical data for the ER25 Ø7 mm collet
| Technical Data | |
|---|---|
| Hole diameter d | 7-6 mm |
| Outside diameter D | 26 mm |
| Overall length L | 34 mm |
ER25 7 mm collet – reliable clamping of medium shanks in a system with enhanced mechanical strength
The ER25 collet with a 6-7 mm range provides stable clamping of tools with medium shank diameters in a system offering increased structural rigidity. Hardened 65Mn steel construction with a hardness of 44-48 HRC according to DIN 6499 guarantees radial runout not exceeding 0.015 mm. A collapse range of 1 mm provides flexibility in fitting tools across the full size range.
Key advantages of the ER25 7 mm collet
- Maximum radial runout of 0.015 mm according to DIN 6499 – positioning precision essential for accurate milling and drilling of medium-sized workpieces
- Clamping range of 6-7 mm with a tolerance of 1 mm – flexibility in tool selection allows shanks with slightly different dimensions to be fitted
- 26×34 mm design with increased mass – effective vibration damping during heavy machining with tools of medium diameters
- 65Mn spring steel hardened to 44-48 HRC – material that maintains consistent clamping properties over many years of use
- Compliance with the international ISO 15488 standard – full interchangeability with holders from leading manufacturers of machine tools and tooling systems
This collet is designed to secure end mills, twist drills, machine taps, and reamers used to machine structural steels, aluminum alloys, and engineering plastics. The 7 mm diameter is a common shank size for tools used to manufacture machine and structural components. The ER25 system with overall dimensions of 26×34 mm exceeds the compact ER11 and ER16 systems in mass and rigidity, resulting in lower vibration amplitude during demanding machining operations. A proven solution for professional toolrooms handling diverse production tasks.
Frequently asked questions
It holds end mills, twist drills, machine taps, reamers, and other tools with straight shanks in the 6-7 mm range. A tolerance of 1 mm provides flexibility in fitting shanks with slightly different dimensions.
The ER25 design with overall dimensions of 26×34 mm has greater mass and rigidity than ER11 (11.5×18 mm) or ER16 (17×28 mm). The heavier construction damps vibration more effectively during machining, improving surface finish and extending the service life of the tools used.
The miniature ER11 has overall dimensions of 11.5×18 mm, the standard ER16 measures 17×28 mm, the general-purpose ER20 measures 21×31 mm, the intermediate ER25 has overall dimensions of 26×34 mm, the heavy ER32 is identified by its 33×40 mm dimensions, and the large ER40 measures 41×46 mm. The system designation is marked on the collet body as required by 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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