KURATA TOOLS - Leading Manufacturer of High Precision Clamping Systems. Discover How We Help
KURATA Tools specializes in the R&D, production, and sales of high-precision clamping systems for CNC machine tools.
The Collet Chuck Holder Tool Back Pull Type is a high-precision, heavy-duty tool holding solution designed for CNC Machining, milling, and drilling applications. As a critical part of your machining workflow, this collet chuck holder ensures exceptional concentricity, stable clamping force, and minimal runout, delivering consistent performance in high-speed operations.
Our ER collet holder series supports a wide range of collet sizes, including ER11, ER16, ER20, ER25, ER32, ER40, and ER50, and works seamlessly with ER collet tool holders and tool collet holders in milling machines and CNC lathes. The back pull type design enables the tool to be pulled axially toward the spindle, avoiding interference with the machine table while providing secure and uniform clamping.
Each collet holder for milling machine is manufactured from high-strength alloy steel with carburization, hardening, and precision grinding, ensuring long service life, high torque transmission, and excellent resistance to vibration and thermal stress.
| Feature | Description |
|---|---|
| High Precision Concentricity | Concentricity tolerance ≤0.005 mm ensures minimal tool runout and precise machining. |
| Strong Clamping Force | Axial pull-back design of the back pull type collet chuck holder provides stable and uniform clamping for heavy-duty cutting. |
| Durable Material | Made from high-quality 20CrMnTi or SCM415 alloy steel, heat-treated to HRC 56–60 for superior wear resistance. |
| Dynamic Balance | Each collet chuck tool holder is dynamically balanced up to G2.5 at 25,000 RPM for high-speed CNC Machining. |
| Wide Compatibility | Compatible with ER collet sizes from ER11 to ER50 and various taper types including BT, SK, CAT, and HSK. |
| Extended Service Life | Hardened and corrosion-resistant surfaces ensure long-lasting performance and low maintenance. |
Back Pull Type Mechanism: Prevents tool interference with machine fixtures while maintaining strong clamping force.
High-Precision Grinding: Ensures accurate spindle alignment and reduces vibration during high-speed machining.
Multi-Size Compatibility: Works with ER collet holders from small (ER11) to large (ER50) sizes.
Universal Tool Holding: Suitable for end mills, drills, taps, reamers, and other high-precision cutting tools.
OEM & Customization: Supports custom marking, surface coating, and special taper designs for machine manufacturers.
| Model | Collet Size | Clamping Range (mm) | Taper Type | Accuracy | Balance Grade |
|---|---|---|---|---|---|
| ER11 Collet Holder | ER11 | 1–7 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
| ER16 Collet Holder | ER16 | 1–10 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
| ER20 Collet Holder | ER20 | 1–13 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
| ER25 Collet Holder | ER25 | 2–16 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
| ER32 Collet Holder | ER32 | 2–20 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
| ER40 Collet Holder | ER40 | 3–26 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
| ER50 Collet Holder | ER50 | 6–34 | BT/SK/HSK | ≤0.005mm | G2.5 / 25,000 RPM |
The Collet Chuck Holder Tool Back Pull Type is ideal for a wide range of industrial applications:
CNC Machining Centers: End mills, drills, and reamers for high-speed operations.
Milling Machines: Precision milling for metals, composites, and plastics.
Mold & Die Making: Stable and accurate tool holding for complex molds.
Aerospace: Machining aluminum, titanium, and lightweight alloys.
Automotive: Engine components, transmission parts, and precision automotive tooling.
Industrial Equipment: Metalworking, drilling, reaming, and high-speed cutting tasks.
| Feature | Back Pull Type Collet Chuck Holder | Standard Collet Holder |
|---|---|---|
| Clamping Force | Axial and uniform | Radial only, uneven |
| Tool Stability | Excellent | Moderate, prone to vibration |
| Accuracy | ≤0.005 mm | ≤0.01 mm |
| Surface Finish | Smooth, high-quality | May cause chatter marks |
| Maintenance | Minimal | Frequent retightening |
| Longevity | Extended service life | Standard |
Q1: What is a collet chuck holder used for?
A: A collet chuck holder securely holds tools such as drills, end mills, and taps in CNC and milling machines, providing precise alignment and stable machining.
Q2: What is the difference between ER collet holder and standard collet holder?
A: An ER collet holder supports multiple collet sizes and offers higher concentricity, while standard holders are usually single-size and less precise.
Q3: How do I select the right ER size?
A: Choose based on tool shank diameter. For instance, ER16 suits 1–10mm tools, while ER32 covers 2–20mm.
Q4: Can I use this collet holder for CNC milling machines?
A: Yes, it is designed for collet holder for milling machine, compatible with a variety of tools and high-speed operations.
Q5: Are customization options available?
A: Yes, we provide OEM/ODM services, including custom taper types, logo engraving, and surface coatings.
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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