ER Tool Holders

An ER Tool Holder is a precision clamping device designed to hold cutting tools securely in CNC Machining centers, milling machines, and turning systems. It ensures optimal tool stability, high accuracy, and excellent balance during high-speed operations.
Our full range includes ER Collet Holder, ER collet chuck, and collet chuck holder options suitable for various spindle types and tool diameters.

We offer standard models such as ER11 collet holder, ER16 collet holder, ER20 collet holder, ER25 collet holder, and ER32 collet holder, as well as ER32 collet block and ER 32 collet holder for diverse tooling setups. Whether you require a CNC ER tool holder, precision ER tool holder, or ER chuck holder, our products are built to meet the rigorous demands of professional machining environments.

Core Advantages

1. Ultra-High Precision (≤0.005 mm Runout)
   Each ER tool holder is manufactured to exacting standards, ensuring outstanding concentricity and balance for smooth and accurate cutting performance. This precision helps extend tool life and achieve superior surface finishes in high-speed CNC operations.

2. Strong Clamping Force & Stability
   The ER collet chuck provides exceptional clamping strength with uniform pressure distribution, preventing tool slippage even during heavy-duty cutting.

3. Premium Alloy Steel Construction
   Made from high-grade 20CrMnTi or SCM415 alloy steel, every CNC ER tool holder undergoes vacuum heat treatment to achieve a hardness of HRC 56–60, ensuring long-lasting wear resistance and mechanical strength.

4. High-Speed Balancing
   Each precision ER tool holder is dynamically balanced to G2.5 at 25,000 RPM, supporting stable operation in high-speed machining centers.

5. Corrosion-Resistant Surface Treatment
   Surface finishes include nickel plating or black oxide coating, offering superior rust protection and a professional appearance.

6. Wide Compatibility
   Our holders are compatible with BT, CAT, HSK, SK, and NT spindles, making them ideal replacements or upgrades in most CNC setups.

Key Selling Points

• Precision-ground taper for accurate tool positioning.

• Available in ER11, ER16, ER20, ER25, and ER32 configurations.

• Supports straight shank and side-lock options.

• Custom ER tool holder length and shank type available.

• Compatible with both standard and sealed collets.

• Suitable for CNC milling, drilling, engraving, and tapping applications.

Technical Specifications

Applications

ER Tool Holders are widely used across industries that demand precision and reliability, including:

• CNC Machining Centers: Ideal for milling, drilling, reaming, and tapping operations.

• Mold & Die Manufacturing: Ensures dimensional accuracy and smooth surface finishes.

• Aerospace Components: Suitable for tight-tolerance parts requiring superior balance.

• Automotive Industry: Supports precision cutting for engine and structural components.

• General Engineering: Perfect for all-purpose CNC and manual machining applications.

Comparison Advantage

Compared with other tool holding systems like Weldon, Hydraulic, or Shrink Fit Holders, the ER collet holder stands out for its:

• Cost Efficiency: More affordable while maintaining high precision.

• Flexibility: Wide clamping range with interchangeable ER collets.

• Ease of Use: Quick setup and easy tool changes.

• Universal Compatibility: Fits multiple spindle interfaces and tool diameters.

While hydraulic chucks provide better vibration damping, the ER collet chuck offers a perfect balance of accuracy, versatility, and cost-effectiveness, making it the most widely used system in CNC workshops worldwide.

Maintenance & Installation Tips

• Clean the taper hole, collet, and nut before use to ensure tight contact.

• Always use a torque wrench when tightening the collet nut.

• Do not overtighten to avoid damaging the collet elasticity.

• Apply anti-rust oil before long-term storage.

• Regularly check for runout deviation to maintain machining accuracy.

Why Choose Us

• Over 10 Years of Manufacturing Experience: Trusted supplier of CNC ER tool holders and ER collet chucks.

• Strict Quality Control: Each holder undergoes precision inspection to maintain ≤0.005 mm runout.

• OEM & Customization: Support for customized logo engraving, dimensions, and surface finishes.

• Comprehensive Product Range: From ER11 to ER32, covering all tool diameters and clamping requirements.

• Global Supply Network: Exporting to 60+ countries with consistent quality and after-sales support.

FAQ

Q1: What is an ER Tool Holder used for?
A: It is used to hold cutting tools such as end mills, drills, and reamers in CNC machines, providing high precision and stability.

Q2: What’s the difference between ER11, ER16, ER20, ER25, and ER32?
A: These refer to collet sizes. Smaller ER numbers (ER11, ER16) are used for fine tools, while larger ones (ER25, ER32) are for heavier cutting and larger diameters.

Q3: Can ER Tool Holders be used for high-speed machining?
A: Yes, our holders are dynamically balanced to G2.5 at 25,000 RPM, ideal for high-speed applications.

Q4: Do you provide custom lengths or special tapers?
A: Yes, we offer OEM and ODM customization for length, taper interface, and surface finish.

Q5: Are your ER Collet Holders compatible with all CNC machines?
A: Yes, they are compatible with BT, CAT, HSK, SK, and NT tool systems.