KURATATools-Leading Manufacturer of High-Precision Clamping Systems
KURATA Tools specializes in the R&D, production, and sales of high-precision clamping systems for CNC machine tools.
KURATA TOOLS - Leading Manufacturer of High Precision Clamping Systems. Discover How We Help



The SK40 Tool Holder, including SK40 Collet Holder, SK40 ER Collet Holder, SK40 Milling Tool Holder, and SK40 CNC Milling Holder, is a high-precision, durable, and versatile solution for CNC and milling applications. Backed by trusted SK40 Tool Holder Suppliers and SK40 Tool Holder Manufacturers, it delivers reliable performance, excellent clamping force, and broad compatibility, making it ideal for aerospace, automotive, mold manufacturing, and industrial machining applications.

SK40 Precision Tool Holder is manufactured to tight tolerances, ensuring accurate tool alignment, minimal vibration, and excellent surface finish during machining.
The taper design, commonly referred to as SK40 Taper, provides uniform clamping across the tool shank, preventing slippage and enhancing machining stability.
Made from high-grade alloy steel with hardened and ground surfaces, the SK40 Tool Holder offers exceptional durability, corrosion resistance, and long service life.
SK40 CNC Milling Holder is compatible with ER Collets, end mills, and other precision cutting tools, making it suitable for a wide range of machining operations.
Quick tool changes are enabled by the SK40 system’s standardized design, improving efficiency in high-volume production environments.
CNC Machining: Milling, drilling, and precision cutting
Mold & Die Manufacturing: High-tolerance component production
Aerospace: Precision parts for aircraft and aerospace components
Automotive: Engine parts, transmission components, and other high-precision applications
General Metalworking: Stainless steel, aluminum, and alloy machining
The SK40 Tool Holder is ideal wherever precision, reliability, and repeatable performance are critical.
Precision Engineering – minimal runout for high accuracy machining
Durable Construction – hardened alloy steel resists wear and corrosion
Wide Compatibility – works with SK40 Collet Holders, ER Collets, and CNC milling tools
Quick Tool Change – standardized SK40 taper ensures efficiency
Trusted Suppliers & Manufacturers – globally recognized quality
| Feature | Specification |
|---|---|
| Tool Holder Type | SK40 Tool Holder / SK40 Milling Tool Holder |
| Material | High-grade alloy steel |
| Taper | SK40 Taper |
| Collet Compatibility | SK40 Collet Holder, SK40 ER Collet Holder |
| Precision | Runout ≤ 0.005 mm |
| Tool Diameter Range | 1 mm – 32 mm (custom sizes available) |
| Max RPM | Up to 20,000 (depending on tool and machine) |
| Surface Treatment | Hardened & ground, corrosion-resistant |
SK40 Tool Holder Dimensions vary depending on model and collet size, but all conform to SK40 standard taper specifications for consistency and interchangeability.
CNC Machining & Milling
Mold & Die Making
Aerospace & Aviation Components
Automotive & Precision Engineering
Electronics & Tooling Workshops
General Metalworking and Prototyping
| Feature | SK40 Tool Holder | BT40 / CAT40 Tool Holder | HSK Tool Holder |
|---|---|---|---|
| Precision | High (≤0.005 mm runout) | Medium | High |
| Clamping Force | Strong & uniform | Moderate | High |
| Tool Change Efficiency | Fast | Moderate | Moderate |
| Taper Standard | SK40 | BT40 / CAT40 | HSK |
| Durability | Hardened alloy steel | Standard steel | High-quality steel |
SK40 Tool Holder stands out for its combination of precision, stability, and broad compatibility, making it a preferred choice for high-accuracy CNC machining applications.
Q1: What is an SK40 Tool Holder?
A: The SK40 Tool Holder is a precision CNC and milling tool clamping system, compatible with ER collets, end mills, and other cutting tools. It includes SK40 Collet Holder, SK40 ER Collet Holder, and SK40 Milling Tool Holder.
Q2: What are SK40 Tool Holder Dimensions?
A: Dimensions depend on the model and collet size, but all conform to the SK40 taper standard to ensure tool compatibility and interchangeability.
Q3: How does SK40 Taper work?
A: The SK40 taper provides uniform clamping by aligning the tool shank with the taper angle in the holder, ensuring precision and minimal runout.
Q4: Who supplies SK40 Tool Holders?
A: Certified SK40 Tool Holder Suppliers and SK40 Tool Holder Manufacturers provide genuine SK40 holders for CNC and milling applications worldwide.
Q5: Can SK40 Tool Holders be used for high-speed milling?
A: Yes, with proper tooling and machine setup, SK40 CNC Tool Holders are suitable for high-speed and high-precision milling operations.
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KURATA Tools specializes in the R&D, production, and sales of high-precision clamping systems for CNC machine tools.
E-mail:sales@kuratatools.com