HSK tool holder

shrink fitmillingdrilling

Product Overview

• High dynamic balance: balanced to G2.5 at 25,000 rpm and to G1.0 at 60,000 rpm
• High precision: extra-long design; tool holder runout ≤0.001 mm; runout accuracy within 0.003 mm at 4×D
• High clamping force: clamping force approximately 2× higher than DIN standard
• Corrosion-, wear- and rust-resistant: special surface treatment
• Minimal distortion after heat treatment: keyway milled after heat treatment for high accuracy
• Durability: designed for up to 3000 clamping cycles when used with Conprofe Shrink-Fit Machine

Working Principle
Clamping is achieved by thermal expansion and contraction. The holder is heated with a shrink-fit unit, the tool is inserted while the bore is expanded, and after cooling the holder contracts to clamp the tool directly. No mechanical components such as collets or nuts are required, making this ideal for high-speed machining requiring high accuracy, dynamic balance and clamping rigidity.

Application Cases
Suitable for clamping various cutting tools in aerospace, semiconductor, medical and precision manufacturing applications.

Technical Parameters (Item: mm)
Item (Unit: mm) — Standard Type — Ultra Slim Type
Clamping Diameter d — 4-10 — 4-10
D — 10-19 — 7-13
D1 — 53 — 53
L — 120-180 — 120-180
Min. Clamping Length E — 12-30 — 12-30
Wall Thickness t — 3-4.5 — 1.5

Features / Technical Specifications

• Series: HSK Series
• Material: stainless steel (curved design as indicated)
• Dynamic balance: G2.5 at 25,000 rpm; G1.0 at 60,000 rpm
• Runout: tool holder runout ≤0.001 mm; runout accuracy within 0.003 mm at 4×D
• Clamping force: approximately 2× higher than DIN standard
• Surface treatment: special treatment for corrosion, wear and rust resistance
• Post-heat-treatment machining: fine milling of key groove after heat treatment to prevent distortion
• Clamping cycles: designed for up to 3000 clamping cycles with specified Shrink-Fit machine (Conprofe Shrink-Fit Machine)
• Applicable industries: aerospace, semiconductor, medical, general precision manufacturing