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Description
Technical data for the ER25 Ø8 mm precision collet with 0.008 mm runout
| Technical data | |
|---|---|
| Hole diameter d | 8-7 mm |
| Outside diameter D | 26 mm |
| Overall length L | 34 mm |
| Max. runout | 0.008 mm |
ER25 Ø8 mm precision collet – professional tool holder, DIN 6499
The ER25 Ø8 mm collet is a precision component of the cutting tool clamping system in CNC machine tools. Made from chromium-manganese spring steel hardened to 58±2 HRC, it guarantees secure, repeatable clamping of straight shanks with diameters of 7-8 mm.
Properties of the ER25 8 mm precision collet
- Permissible radial runout of 0.008 mm – ensures stable tool operation and a high-quality surface finish
- Hardened to 58±2 HRC – provides wear resistance and years of service
- Manufactured in accordance with DIN 6499 – guarantees compatibility with every ER25 tool holder
- Clamping diameter 7-8 mm – mounting tolerance of 1 mm for universal use
The ER25 precision collet is designed to clamp milling cutters, drills, taps, countersinks, and reamers. It performs well in machining centers, CNC milling machines, engraving machines, and high-speed spindles. Collet dimensions: outside diameter 26 mm, height 34 mm.
The choice of professionals who value accuracy and repeatability in their daily work. Order now and equip your machinery with reliable accessories.
Frequently asked questions
The precision collet provides a maximum radial runout of 0.008 mm, while the standard version allows up to 0.015 mm. A deviation nearly 2 times smaller translates into better surface quality and more accurate workpiece dimensions.
It is ideal for finish milling, precision hole reaming, die and mold machining, and producing parts with tighter tolerance requirements. The 8 mm shank is one of the most commonly used cutting tool sizes.
The miniature ER11 can be identified by its dimensions of 11.5×18 mm, the popular ER16 measures 17×28 mm, the universal ER20 measures 21×31 mm, the intermediate ER25 measures 26×34 mm, the industrial ER32 measures 33×40 mm, and the largest ER40 measures 41×46 mm. The system designation is marked on the collet body in accordance with 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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