HSK Series HDC Ultra Precision Hydraulic Expansion Tool Holder

Integrally quenched alloy steel hydraulic clamping tool holders with standard HSK63A / HSK100A hollow double-contact spindle taper, fully sealed hydraulic expansion clamping structure with ultra-low radial runout, mirror polished vibration-damping body. Specially developed for 20,000–40,000 RPM ultra-high speed precision cutting on HSK-spindle CNC machining centers, perfect for mold mirror finish milling, graphite electrode and aerospace thin-wall alloy component machining.

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Hydraulic Tool Holder

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Description

This HSK-HDC Hydraulic Tool Holder is a high-performance high-speed CNC clamping component forged from high-strength 40Cr alloy steel with integral quenching, stress relief and full mirror hard grinding finish. Equipped with hollow short double-contact HSK taper and fully sealed hydraulic inner clamping bore, it delivers ultra-stable rigid clamping and minimal radial runout, fully meeting ultra-high-speed precision machining requirements for high-end mold and precision parts.

Fully Hard-ground Double-contact HSK Hollow Short Taper

Mainstream specifications HSK63A and HSK100A are available. The hollow short taper undergoes complete precision hard grinding with double-face positioning contact, achieving zero-clearance fit with machine spindle. Excellent dynamic balance performance effectively eliminates cutting chatter under extreme high spindle rotation speeds.
Fully Sealed Hydraulic Expansion Ultra-low Runout Clamping Core

A closed hydraulic oil chamber is built inside the chuck body. Tighten the side hex pressure screw to evenly expand the precision inner bore for full-surface close contact with straight-shank cutters. Radial runout is controlled ≤0.002mm at the 3xD clamping length, drastically improving workpiece mirror surface finish and extending the service life of carbide ball end mills, drills and reamers.
Mirror Polished Vibration-damping Hardened Steel Body

The whole blank is integrally quenched to high hardness, with stress relief treatment and mirror polishing on outer surfaces. Outstanding vibration absorption prevents permanent deformation during long continuous high-speed cutting, maintaining consistent ultra-precision clamping performance for mass mold and precision component production.
Complete Standard Size Series

Covers two mainstream spindle tapers HSK63A and HSK100A. Inner clamping diameter D1 ranges from 3mm to 32mm, with multiple total length options including 70L / 80L / 90L / 100L / 120L / 150L. Short stubby models provide maximum rigidity for high-speed finish milling; long extended versions are designed for deep narrow cavity mold machining. Reserved M threads on the side support through-coolant cutting tools.
Target Precision Machining Application Scenarios

Exclusively matched with HSK-spindle high-speed machining centers, widely applied in mold high-speed mirror finish milling, graphite electrode precision processing, aerospace thin-wall alloy parts, medical precision hardware and ultra-precision 3C electronic component manufacturing.

Dimension Specification Note

Only a single horizontal finished product render is provided in this material. The complete standardized dimension parameter table (including D1 clamping bore diameter, D2 chuck outer diameter, L total length, M pressure screw thread specification) can be supplied separately upon customer request.

Model Naming Rule

Standard format:


            HSK[Taper Size]-HDC[Hydraulic Chuck Series]-[D1 Clamping Bore Diameter]-[Total Length]L

Example: HSK63A-HDC12-90L

HSK63A: Standard HSK63A hollow double-contact machine spindle taper
HDC: Hydraulic expansion chuck series code
12: Inner hydraulic clamping bore D1 = 12mm
90L: Overall total length L = 90mm

Applications

CNC Machining

Ideal for CNC lathe, milling and machining center operations, ensuring high-precision dimensional control and reliable tool holding for mass production.

Quality Control Labs

Suitable for quality inspection departments and calibration labs, providing accurate measurement data to verify product compliance with ISO and industry standards.

Mold & Die Making

Perfect for mold and die workshops, where micron-level precision tools and gauges are essential for complex cavity machining and final inspection.

OEM/ODM Projects

Customizable solutions for OEM and ODM manufacturing partners, offering tailored measuring tools and CNC accessories to meet unique production requirements.

Automotive Manufacturing

Designed for automotive component production lines, ensuring consistent precision and durability in engine parts, transmission components and assembly processes.

Aerospace & Precision Engineering

Ideal for aerospace and defense manufacturing, where ultra-high precision instruments and reliable tool holders meet strict quality and safety requirements.