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| Size: | |
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nt30 nt40 nt50 er
ZH
8466100000
Alloy Steel
56-58HRC
Machine tools collet chuck tool holder clamping accessories
DIN2080
0.005mm
milling machine
NT30/40/50
Silver
din2080
0.005mm
G2.5 25000rpm
NT30 NT40 NT50 ER Collet Chuck Tool Holder
ZH
DIN2080 ER Collet Chuck NT40 ER16 ER25 ER32 Milling Tool Holder
Material: 20CrMnTi
Taper tolerance:<AT3
Carbon depth: 0.8mm±0.2mm
Max. Run out: <0.005mm
Surface Roughness: Ra<0.005mm
Cooling AD＋B type can be made by request
When Order, please specify balancing G6.3 or G2.5
Shank body standard: DIN2080
| Model | L1 | D | Clamping range |
| NT30-ER20-70 | 70 | 34 | 0.5-13 |
| NT30-ER25-100 | 100 | 42 | 0.5-16 |
| NT30-ER32-100 | 100 | 50 | 1-20 |
| NT40-ER16-45 | 45 | 28 | 0.5-10 |
| NT40-ER20-45 | 45 | 34 | 0.5-13 |
| NT40-ER25-100 | 100 | 42 | 0.5-16 |
| NT40-ER32-100 | 100 | 50 | 1-20 |
| NT40-ER40-70 | 70 | 63 | 2-26 |
| NT50-ER16-100 | 100 | 28 | 0.5-10 |
| NT50-ER20-100 | 100 | 34 | 0.5-13 |
| NT50-ER32-100 | 100 | 50 | 1-20 |
| NT50-ER40-80 | 80 | 63 | 2-26 |
| NT50-ER40-100 | 100 | 63 | 2-26 |
Package and shipment
Packing: 1pcs/plastic bag, plastic box inside ,carton box outside can also packing as your request.
Shipping: 3-7days after payment, by international express or as your request.
Company Profile
Pingyuan Zhenghao Machinery CO, LTD was found in 1998, professional produced GT precision modular vise, quick change tool post, tool holder, collets, end mills. It is a professional manufacturer of CNC lathe accessories in china. We have export experience for more than 10 years , Our productions export to more than 20 countries and regions.
Our company adheres to the principles of "quality first, customers supreme and reputation fundamental". we sincerely welcome foreign customers to visit us .
While modern CNC machines utilize BT, SK, or CAT tapers designed for Automatic Tool Changers (ATC), thousands of reliable manual milling machines (like Bridgeport-style knee mills) and conventional boring mills rely on the proven DIN 2080 (NT / ISO) taper system. These machines require a tool holder that is secured manually via a drawbar extending through the machine spindle. Our NT ER Collet Chucks allow these traditional machines to utilize the modern, highly accurate, and widely available ER collet system. This means you can hold a vast array of drill bits, end mills, and taps with a single tool holder simply by changing the collet, dramatically reducing setup time and tooling costs.
Premium Material & Hardness: Forged from high-grade alloy steel (such as 20CrMnTi) and case-hardened to HRC 56-60. The robust construction ensures excellent wear resistance on the taper and threads, providing years of reliable service in demanding manual machining environments.
High Precision Runout: The internal ER collet seat and the external NT machine taper are precision-ground simultaneously. We guarantee a maximum Total Indicator Runout (T.I.R.) of ≤ 0.005mm (5 microns) at the taper, ensuring your tools run true for better surface finishes and longer tool life.
Standard Drawbar Threads: Machined with standard internal threads at the rear of the taper to perfectly match your machine's manual drawbar (e.g., M12 for NT30, M16 for NT40, M24 for NT50). Note: Imperial (inch) drawbar threads are also available upon request.
Comprehensive ER Range: Available to fit all standard ER collet sizes, including ER11, ER16, ER20, ER25, ER32, ER40, and ER50, providing clamping capacities from 1mm up to 34mm.
Nut Variations: Choose from standard Hex nuts (UM type) for maximum clamping force, or Mini nuts (M type) for tight clearance applications.
Direct Manufacturer Savings: Bypass trading companies and source premium DIN 2080 manual machine tooling directly from our factory for highly competitive wholesale pricing.
Complete Spindle Compatibility: We manufacture the full range of NT tapers: NT30 (for smaller knee mills), NT40 (the most common size for universal milling machines), and NT50 (for heavy-duty boring and milling machines).
Strict Quality Control: Every tool holder undergoes rigorous inspection using 3D CMMs and taper gauges to verify dimensional accuracy and taper angle (AT3 standard) before packaging.
Custom Solutions: Need a specific drawbar thread (like 5/8"-11 for an NT40 spindle)? We can manufacture custom threads to match your specific machine requirements.
Q1: What is the difference between NT, ISO, and DIN 2080?
A: In the context of tool holders, they generally refer to the exact same thing. DIN 2080 is the official German standard. NT (National Taper) and ISO (International Organization for Standardization) are common industry names for this 7/24 taper design that features a cylindrical section behind the flange and an internal thread for a manual drawbar.
Q2: Can I use an NT40 holder in a BT40 or SK40 CNC machine?
A:No. While NT40, BT40, and SK40 all share the same 7/24 taper angle, the top portion is completely different. NT holders have a cylindrical pilot and an internal thread for a manual drawbar. BT and SK holders have a specific V-flange for an Automatic Tool Changer (ATC) and internal threads designed to accept a pull stud (retention knob). They are not interchangeable.
Q3: How do I know what drawbar thread I need?
A: The standard metric threads are:
NT30: M12 x 1.75
NT40: M16 x 2.0
NT50: M24 x 3.0 Important: Many machines built for the North American market use Imperial (inch) drawbars (e.g., 1/2"-13 for NT30, 5/8"-11 for NT40). Please verify your machine's drawbar thread before ordering. We can supply both metric and imperial threads.
Q4: Does the holder come with the collet nut?
A: Yes, all of our NT ER Collet Chucks come fully assembled with the appropriate ER clamping nut. Collets and spanner wrenches are sold separately.
Modernize your manual milling operations with the precision and versatility of our DIN 2080 NT ER Collet Chucks.
Contact our sales team today for a complete catalog and bulk pricing.
