ISO collet chuck ISO series

locking clampERsteep taper

Overview
ISO collet chucks are a steep taper interface for machine tool spindles, suitable across light to heavy machining applications. Centering is achieved by taper contact and clamping is secured with an additional stud for reliable retention.

Main benefits

• Low radial runout for high machining accuracy
• Design adapted for continuous industrial use
• High clamping force with straightforward dynamic balancing
• Quick insertion and removal for reduced tool-change time

Available tool holder variants (table)
Tool Holder System | Holder Type | Holder length at extension end [mm] | Collet Type | Collet range | Cutter dia [mm] | Combined runout accuracy at 4D [mm] | Main features
ISO Collet Chuck | ISO10 | 24 | ER | ER11 | 1.0 - 7.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO20 | 35 | ER | ER16 - ER20 | 2.0 - 13.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO20 | 40 | ER | ER16 - ER20 | 2.0 - 13.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO25 | 35 | ER | ER16 - ER25 | 2.0 - 16.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO25 | 60 | ER | ER16 - ER25 | 2.0 - 16.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO30 | 45 | ER | ER32 | 2.0 - 20.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO30 | 65 | ER / SK | ER32 | 2.0 - 20.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO20 | 35 | SK | SK10 | 2.0 - 10.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO25 | 35 | SK | SK10 - SK16 | 2.0 - 16.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO25 | 60 | SK / KR | SK10 - SK16 | 2.0 - 16.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO20 | 35 | KR | KR16 | 1.0 - 10.0 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO25 | 35 | KR | KR16 - KR25 | 2.0 - 14.5 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel
ISO Collet Chuck | ISO25 | 60 | KR | KR16 - KR25 | 2.0 - 14.5 | ≤ 5 | Shank run-out accuracy ≤ 2 µm; Dynamic balancing grade ≤ G1; Customized, extra wear resistant stainless steel

Technical specifications

• Centering: taper contact
• Clamping: secured by an additional stud
• Applicable for light to heavy machining
• Shank run-out accuracy ≤ 2 µm
• Combined runout accuracy at 4D: ≤ 5
• Dynamic balancing grade: ≤ G1
• Material: customized, extra wear resistant stainless steel
• Main collet systems available: ER, SK, KR (various ranges: ER11, ER16–ER32, SK10–SK16, KR16–KR25)
• Holder types / sizes available: ISO10, ISO20, ISO25, ISO30 with multiple length variants