BT tool holder

shrink fitfor machiningfor precision engineering

Product Overview

• High dynamic balance: balanced to G2.5 at 25,000 rpm; 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: approximately 2× DIN standard
• Surface treatment: corrosion-proof, wear-resistant and rust-proof
• Durability: up to 3000 clamping cycles with Conprofe Shrink-Fit Machine

Working Principle
Clamp the cutting tool by thermal expansion: heat the BT Series holder with a Shrink-Fit unit, insert the tool when the bore expands, then cool to create a tight interference fit without collets or nuts. Ideal for high-speed machining requiring high accuracy, dynamic balance and clamping rigidity.

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

Technical Parameters

• Clamping diameter d: Standard 4–20 mm; Slim 4–20 mm
• D: Standard 15–33 mm; Slim 10–27 mm
• D1: Standard 20–51 mm; Slim 14–33 mm
• L (Length): Standard 80–160 mm; Slim 90 mm
• Min. inserting length E: Standard 15–42 mm; Slim 15–47 mm
• Max. inserting length H: Standard 60–210 mm; Slim 65–110 mm
• Dynamic balance: G2.5 @25,000 rpm; G1.0 @60,000 rpm
• Runout: tool holder runout 0.001 mm; runout accuracy within 0.003 mm at 4×D
• Clamping force: approx. 2× DIN standard

Specifications

• Material: alloy steel, precision machined
• Surface: special corrosion-/wear-resistant treatment
• Estimated clamping cycles: up to 3000 with Conprofe Shrink-Fit Machine