High precision ER25 collets of the HP series are designed to ensure stable and highly accurate tool clamping in machining applications performed on CNC machines, automatic lathes, machining centers and high-speed milling systems. Manufactured according to DIN ISO 15488 (DIN 6499) standards, ER25 collets are widely used with ER tool holders and represent one of the most common and reliable tool clamping systems in precision machining.

The ER25 HP collet design includes 12 precision clamping slots which allow an even distribution of clamping force along the entire tool shank. This configuration improves concentricity and ensures a stable interface between the cutting tool and the tool holder. The result is reduced vibration, improved dimensional stability and greater machining accuracy even during demanding operations or high spindle speeds.

The HP (High Precision) version guarantees a maximum run-out of 0.005 mm, provided that the ER25 collet clamps a tool with a diameter equal to the nominal size of the collet. Under these conditions the system achieves optimal concentricity and ensures consistent machining performance in precision operations where tool stability and accuracy are essential.

Functional surfaces of the ER25 HP collets are precision ground and finished with a surface roughness of Rz 1.6, ensuring optimal contact with the tool holder and uniform transmission of clamping forces. This high surface quality contributes to reduced wear, improved stability and consistent performance over long production cycles.

The ER25 HP series provides a clamping range from 1 mm up to 16 mm with 0.5 mm increments, allowing precise selection of the correct collet according to the tool diameter. This dimensional range makes the ER25 system extremely versatile and suitable for clamping milling cutters, drills, reamers and finishing tools used in precision machining.

High precision ER25 collets are commonly used in industries such as precision mechanical manufacturing, automotive production, mold and die manufacturing and CNC machining operations. In production and quality control departments, the use of ER25 HP collets helps reduce geometric machining errors, improve tool stability and extend tool life. Selecting the appropriate collet according to the exact tool diameter also minimizes clamping deformation and vibration, ensuring improved surface finish and dimensional accuracy of machined components.

ER25 high precision collets of the HP series therefore represent a reliable solution for machine operators, production engineers and industrial technicians requiring stable, repeatable and highly precise tool clamping systems.