GAETANO CAPORALI ERC25.D Standard ER25 collets, DIN ISO 15488 (DIN6499), diameter of your choice
(Incl. Tax: €13.68)
The ER25 clamping collets according to DIN ISO 15488 (formerly DIN 6499) are designed for precise clamping of cylindrical tools in ER toolholders used on CNC machines, machining centers, and precision lathes. Featuring 16 elastic slots, Rz 1.6 surface finish, and runout accuracy up to 0.008 mm, they ensure high precision, stability, and repeatability. The clamping range from 1 to 20 mm with metric progression allows reliable tool holding for end mills, drills, and reamers in demanding machining applications.
The ER25 standard clamping collets according to DIN ISO 15488 (formerly DIN 6499) are essential components in modern tool clamping systems used in CNC machines, machining centers, and precision lathes. These elastic collets are designed to provide secure, concentric, and repeatable clamping of cylindrical tools, ensuring high machining accuracy and operational stability.
The ER25 collet design features a tapered body with an 8° taper angle and 16 elastic segments created by longitudinal slots. This configuration allows the collet to compress uniformly around the tool shank, ensuring balanced clamping forces and minimizing vibration during machining operations.
The collets are manufactured with high-quality surface finishing, reaching Rz 1.6 surface roughness, which improves contact between the tool and the collet surface. This contributes to enhanced clamping stability and better tool concentricity during operation.
The clamping range covers diameters from 1 mm to 20 mm, with a metric progression of 1 mm from 1 to 20 mm. This wide range allows the ER25 system to accommodate a variety of cylindrical tools such as end mills, drills, reamers, and finishing tools. Each collet is engineered to achieve runout accuracy up to 0.008 mm, which is essential for maintaining precision in high-performance machining environments.
The ER25 geometry ensures full compatibility with standard ER toolholders. The main body diameter measures 25 mm, while the outer head diameter is 26 mm. The total collet length is 34 mm, and the front diameter measures 12 mm. These dimensions guarantee perfect integration with ER collet chucks commonly used in modular toolholding systems.
Due to their reliability and versatility, ER25 collets are widely used across multiple industries including automotive manufacturing, aerospace machining, mold production, precision engineering, and machine tool construction. Their stable clamping performance and precision contribute to improved surface finish quality, reduced tool wear, and increased machining productivity.
For production engineers, machinists, and machine tool manufacturers, ER collets remain one of the most reliable and widely adopted solutions for precision tool clamping in modern machining environments.
Technical specifications ER25 clamping collet – DIN ISO 15488 (DIN 6499)
| Parameter | Value |
|---|---|
| Standard | DIN ISO 15488 (DIN 6499) |
| Type | ER clamping collet |
| Size | ER25 |
| Diameter A | 25 mm |
| Diameter B | 26 mm |
| Angle α | 8° |
| Length L | 34 mm |
| Height H | 12 mm |
| Tool diameter D | 1 – 20 mm |
| Taper angle | 30° |
| Accuracy (run-out) | ≤ 0.008 mm |
| Number of slots | 16 |
| Surface finish | Rz 1.6 |
| Clamping capacity -0.5mm | From Ø1 to Ø2 |
| Clamping capacity -1mm | From Ø3 to Ø16 |
| Clamping capacity -0.1mm | From Ø17 to Ø20 |
| Collet diameter progression | D1–D20 ×1 mm |
| Reduced length ERC25.D19 | 31 mm |
| Reduced length ERC25.D20 | 28.5 mm |
- Brand:
- GAETANO CAPORALI
- Typology:
- Standard ER collet
