MZG ER Tool Holder System
MZG have synthesized the provided information to craft a comprehensive, expert-level overview of the ER Tool Holder system. This system is arguably the most versatile and widely adopted tool holding solution in the modern machine shop, representing the pinnacle of versatility and convenience. Built around the industry-standard ER collet, this tool holder is a cornerstone of any modern milling, drilling, or engraving operation.
Unmatched Versatility and Clamping Range
Core strength lies in collet-based design. Single ER tool holder can securely clamp wide array of tool shank diameters by swapping appropriately sized ER collet, making it incredibly cost-effective solution.
Reliable Precision for Diverse Tasks
Excellent concentricity crucial for good surface finishes. High-performance models precision-balanced to G2.5 at 25,000-30,000 RPM for High-Speed Machining and engraving applications.
Specialized Designs for Niche Applications
Non-eccentric full-circle balanced nuts minimize wind resistance and noise. Slim M-Type nuts designed for tight spaces and deep cavities. Keyless groove design for high rotational speeds.
System Performance Analysis
The performance of an ER Tool Holder is defined by its exceptional versatility, reliable precision, and its ability to be configured for a vast spectrum of machining applications, from general-purpose work to high-speed finishing. The core strength of the ER system lies in its collet-based design.
A single ER tool holder can securely clamp a wide array of tool shank diameters simply by swapping out the appropriately sized ER collet. This flexibility allows workshops to hold end mills, drills, reamers, taps, and other shanked tools with minimal inventory of holders, making it an incredibly cost-effective and efficient solution.
ER tool holders provide excellent concentricity, which is crucial for achieving good surface finishes, ensuring even tool wear, and maintaining dimensional accuracy. High-performance models such as the HSK-ER and BT-GER series are precision-balanced to G2.5 at 25,000 RPM (or even up to 30,000 RPM), making them ideal for High-Speed Machining (HSM) and engraving.
The system has evolved to meet specific manufacturing challenges with specialized designs for niche applications. High-Speed Nuts utilize non-eccentric, full-circle balanced nut design. Slim "M-Type" Nuts feature small diameter for tight spaces. Keyless Groove Design better suited for high rotational speeds.
Key Performance Indicators
- Dynamic Balance: G2.5 (High-Speed), G6.3 (General Purpose)
- Maximum Speed: Up to 30,000 RPM
- Collet Series: ER11, ER16, ER20, ER25, ER32, ER40, ER50
- Interface Types: BT, DAT, HSK, NT, MT, R8, ISO, C-Type
- Special Features: M-Type nuts, Non-eccentric design
Our Products
ISO-ER Milling Machine Tool Holder
C41A high-speed tool holder for engraving machines, featuring precision ground threads, external hex nuts for ER16/ER20 collets, and balanced to G2.5, 25000RPM.
BT-GER Milling Machine Tool Holder
C42A high-speed tool holder for carving and milling machines, equipped with a non-eccentric, full balanced round nut for reduced noise and minimal wind resistance.
BT-ER Milling Machine Tool Holder
C43Features precision ground threads, with external hex nuts for ER16/ER20 and a standard nut for other sizes (optional strong nuts available); dynamically balanced to G6.3, 10000RPM (higher speeds on request).
BT-ER-M Milling Machine Tool Holder
C44Utilizes small diameter nuts to prevent interference, features precision ground threads, and is balanced to G6.3, 10000RPM.
BT-ER Collet Chuck Group
C45A comprehensive set of ER collet chuck tool holders, designed for various clamping ranges.
DAT-ER Milling Machine Tool Holder
C46Equipped with precision ground threads, featuring external hex nuts for ER16/ER20 and a standard nut for other sizes (optional strong nuts available); dynamically balanced to G6.3, 10000RPM.
DAT-ER Milling Machine Tool Holder (M Type)
C46An M-type ER tool holder with small diameter nuts to avoid interference, suitable for milling.
HSK-ER Milling Machine Tool Holder
C47The tool holder's rotation undergoes balance testing, capable of achieving G2.5 at 25000RPM; designed to securely clamp various diameter tools.
NT-ER Milling Machine Tool Holder
C47The tool holder's rotation is balance-tested, achieving G2.5 at 25000RPM; suitable for clamping a wide range of tool diameters.
MT-ER Milling Machine Tool Holder
C48The tool holder's rotation is balance-tested, achieving G2.5 at 25000RPM; capable of clamping various diameter tools.
R8-ER Milling Machine Tool Holder
C48The tool holder's rotation is balance-tested, achieving G2.5 at 25000RPM; designed to clamp various diameter tools.
C-ER-M Straight Shank ER Collet Chuck Holder
C50A straight shank ER collet extension rod, where the M-type utilizes small diameter nuts to prevent interference.
C-ER-A Straight Shank ER Collet Chuck Holder
C51A straight shank ER collet extension rod.
ER Extension (For Lathe)
C50An ER extension rod specifically designed for lathe applications.
Product Gallery
Technical Parameters
Clamping System & Compatibility
ER collet system featuring double-angled collet compressed by clamping nut into precision-ground taper. Available in full range: ER11, ER16, ER20, ER25, ER32, ER40, ER50. Compatible with virtually every machine spindle type: BT, DAT, HSK, NT, MT, R8, ISO, C-Type.
Dynamic Balance & Speed Performance
High-Speed Grade: G2.5 at 25,000-30,000 RPM (HSK-ER, BT-GER, ISO-ER). General Purpose Grade: G6.3 at 10,000 RPM (standard BT-ER, DAT-ER, NT-ER). Higher balance grades (G2.5 @ 40,000 RPM) available via special order.
Critical Operating Procedures
Tool shank must be inserted into collet beyond effective clamping length to ensure proper clamping and prevent damage. Using correct specified wrench crucial to avoid damage to nut and holder. Each collet offers clamping range (typically 1mm for standard collets).
Application Scenarios & Applicable Machining
Application Scenarios
- General Purpose Milling and Drilling: Most common application, go-to choice for holding end mills for roughing and finishing, and for holding drills with high precision
- High-Speed Finishing and Engraving: High-balance models (HSK-ER, ISO-ER, BT-GER) excel in mold & die making, artistic engraving, and finishing operations where surface quality is critical
- Machining in Confined Areas: M-Type holders with slim nuts essential for 5-axis machining and reaching features in deep pockets without holder colliding with workpiece
- Extended Reach Machining: C-ER straight shank holders widely used as extension rods to machine features that are otherwise inaccessible with standard-length holders
- Lathe and Mill-Turn Applications: Straight shank and other ER extensions heavily used on lathes and mill-turn centers for holding live tooling
Main Functions
- Provide Universal, Flexible Clamping: Most critical function to securely hold vast range of tool shank diameters using standardized, interchangeable collet system
- Ensure Reliable Machining Precision: Functions to provide excellent concentricity and stability for wide variety of operations, from heavy drilling to fine engraving
- Offer Maximum Machine Compatibility: Designed to interface with nearly any milling machine, lathe, or engraving machine spindle through extensive offering of shank types
- Adapt to Specialized Machining Needs: Through variants like M-Type nuts and high-speed designs, functions as modular platform optimized for specific, challenging applications
- Cost-Effective Solution: Minimal inventory of holders required due to wide clamping range with each collet offering typically 1mm range for enhanced versatility
Main Functions
Primary Functions
- Provide Universal, Flexible Clamping: Most critical function to securely hold vast range of tool shank diameters using standardized, interchangeable collet system
- Ensure Reliable Machining Precision: Functions to provide excellent concentricity and stability for wide variety of operations
- Offer Maximum Machine Compatibility: Designed to interface with nearly any milling machine, lathe, or engraving machine spindle in the world
Performance Benefits
- Adapt to Specialized Machining Needs: Through variants like M-Type nuts and high-speed designs, functions as modular platform optimized for specific applications
- Cost-Effective Workshop Solution: Minimal inventory of holders required, making it incredibly cost-effective and efficient solution for modern machine shops
- Industry Standard Solution: Serves as industry-standard solution for broad spectrum of machining operations, balancing performance, flexibility, and cost
Need Professional ER Tool Holder Solutions?
Our technical team can help you select optimal ER tool holders for your versatile machining applications. From general-purpose to high-speed precision work, we provide the most comprehensive and cost-effective clamping solutions.
