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 SK Collet Chuck is a high-precision tool holder designed for CNC Machining centers, offering superior clamping accuracy and reliable performance. Also referred to as SK Collet Holder or SK Tool Holder, it provides excellent concentricity, minimal runout, and stable tool retention, making it ideal for demanding applications in aerospace, automotive, mold manufacturing, and industrial machinery.
Compatible with SK30, SK40, and SK50 spindle interfaces, this collet chuck supports a wide range of ER collets, providing versatility for different tooling requirements. Its robust and balanced design ensures high-speed machining stability and extends the lifespan of both tools and spindles.

Maintains concentricity and minimal runout for precise machining.
Ensures repeatable positioning for consistent results.
Ideal for high-speed milling and drilling operations.
Reliable clamping with ER collets prevents tool slippage.
Supports high-speed and heavy-duty machining with stable torque transmission.
Enhances surface finish and machining quality.
Made from hardened steel for maximum wear resistance.
Heat-treated for extended tool life under continuous use.
Balanced design reduces vibration and spindle wear.
Suitable for SK30, SK40, and SK50 CNC spindles.
Compatible with ER collet series for various tooling sizes.
Supports end mills, drills, reamers, taps, and other precision cutting tools.
CNC Machining – Milling, drilling, and high-speed cutting operations.
Mold & Die Manufacturing – Precision tooling for injection molds, stamping dies, and die casting.
Aerospace & Automotive – Machining of high-strength, critical components.
Industrial Manufacturing – Metal fabrication, mechanical parts, and assembly operations.
High-Precision CNC Performance – Reduces runout and ensures accurate tool positioning.
Reliable Clamping – ER collets provide secure tool retention and stable torque transfer.
Durable & Long-Lasting – Hardened steel construction withstands heavy-duty operations.
Versatile & Compatible – Fits multiple SK spindle sizes and supports various collet diameters.
Enhanced Productivity – Stable clamping improves machining efficiency and reduces downtime.
| Feature | Specification |
|---|---|
| Tool Holder Type | SK Collet Chuck |
| Collet Type | ER Series |
| Spindle Interface | SK30 / SK40 / SK50 |
| Material | Hardened Steel |
| Runout | ≤0.003 mm |
| Max Speed | 12,000 rpm (depending on size) |
| Balancing | G6.3 @ 12,000 rpm |
| Application | CNC Milling, Drilling, Reaming |
CNC Machining Centers – Milling, drilling, and tapping with precision.
Mold & Die Manufacturing – Injection molds, stamping dies, and precision tooling.
Aerospace Components – High-speed machining for critical aerospace parts.
Automotive Parts Manufacturing – Engine blocks, transmission parts, chassis components.
General Industrial Production – Metal fabrication and mechanical assemblies.
Compared to standard collet holders:
Higher Precision – Reduced runout ensures better machining accuracy.
Stronger Tool Retention – Prevents slippage during high-speed operations.
Enhanced Durability – Heat-treated steel withstands heavy-duty machining.
Balanced Design – Reduces vibration and improves surface finish quality.
Q1: What collets are compatible with SK Collet Chuck?
A1: Compatible with standard ER series collets, such as ER11, ER16, ER20, ER25, and ER32, depending on the chuck size.
Q2: Can this collet chuck handle high-speed machining?
A2: Yes, it is balanced to G6.3 at 12,000 rpm, suitable for high-speed milling and drilling.
Q3: Which spindle sizes are supported?
A3: SK30, SK40, and SK50 spindle interfaces.
Q4: How does this chuck improve machining?
A4: Provides stable tool retention, reduces runout, enhances torque transfer, and ensures consistent precision.
Q5: Which industries typically use SK Collet Chucks?
A5: Aerospace, automotive, mold & die manufacturing, CNC machining centers, and general industrial manufacturing.
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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