Dynamic Balanced ER Nuts for CNC Collets | High-Precision, Low-Noise, Long-Life Clamping Nuts
Premium Dynamic Balanced ER Nuts for CNC milling, drilling, and grinding. Made from 42CrMo with high accuracy, low vibration, reduced noise, and extended lifespan. Available in A, M, and UM Series with multiple specifications for all ER collets. Perfect for milling cutters, tool holders, and high-speed CNC applications.
High Stability With Dynamic Balancing
Balanced ER Nuts are optimized through dynamic balancing technology, significantly reducing spindle vibration during high-speed machining. This ensures smoother rotation, less noise, and improved cutting accuracy—ideal for CNC milling, drilling, and grinding applications that demand precision and stability.
Durable 42CrMo Alloy Steel for Long Service Life
Manufactured using premium 42CrMo alloy steel, these balanced nuts offer superior hardness, wear resistance, and deformation resistance. Even under long-term, high-speed operation, the nut maintains stable clamping force, ensuring extended tool life and reliable performance in industrial environments.
Enhanced Tool-Holding Performance & Multi-Specification Options
With optimized thread design and improved concentricity, Balanced ER Nuts provide stronger and more consistent clamping to minimize runout and improve machining precision. A-Series, M-Series, and UM-Series models are all available, offering complete size options to fit different tool holders and CNC machines for maximum compatibility.
Balance Nuts
A collet nut is a component of the collet system commonlyused in CNC machines for high precision drilling, miling, andgrinding applications. The collet nut is made up of a nut and athreaded body shaft, and it is used to tighten the collet system around the tool shank, providing a secure grip on the tool. lt isimportant to assemble the collet and collet nut correctly to ensureproper functioning and prevent damage to the collet or tool . The collet nut can be replaced if necessary to improve the performanceof the collet chuck.
High-Speed CNC Machining Centers
Balanced ER Nuts are widely used in high-speed CNC machining centers where precision and stability are crucial. Their dynamic balancing reduces vibration and improves spindle performance, making them ideal for high-RPM milling, drilling, engraving, and contour cutting.
Precision Tooling & Mold Manufacturing
In industries requiring high-accuracy surface finishing—such as mold making, aerospace components, and precision tooling—balanced nuts ensure better concentricity and tighter tool clamping. This helps reduce tool runout, improve dimensional accuracy, and enhance final product quality.
Industrial Production Lines & Automated Machinery
Balanced ER Nuts are suitable for automated CNC production lines and industrial machinery where continuous operation is needed. Their long service life, stable clamping performance, and lower noise output contribute to increased machine uptime and more efficient mass production.
Why Choose Our Balance Nuts?
Engineered for Precision, Stability,
and High-Speed Performance
Professionally Dynamic-Balanced for High-RPM Machining
Our Balance Nuts are dynamically balanced to minimize vibration during high-speed spindle operation. This ensures smoother cutting, reduced tool runout, and improved machining accuracy—especially important when running above 20,000 RPM.
Manufactured from Premium 42CrMo for Long Service Life
We use high-strength 42CrMo alloy steel, heat-treated for superior hardness and durability. This material drastically improves wear resistance and extends the lifespan of both the nut and your collet system, making our products ideal for demanding industrial environments.
Greater Clamping Stability & Reduced Tool Slippage
Each nut is precision-ground with strict concentricity control, ensuring a tighter and more stable tool grip. The enhanced clamping force significantly reduces the risk of tool loosening during machining, providing consistent performance and safer operation at all speeds.
Technical Specifications
Detailed dimensions and performance data to
help you select the right Balance Nut for your CNC tooling system.
| Series | Type | D (mm) | L (mm) | M (Thread) |
|---|---|---|---|---|
| A Series | Nut ER 11 A, balanced | 19 | 11.3 | M14×0.75 |
| A Series | Nut ER 16 A, balanced | 28 | 17.5 | M22×1.5 |
| A Series | Nut ER 20 A, balanced | 34 | 19 | M25×1.5 |
| A Series | Nut ER 25 A, balanced | 40 | 22 | M32×1.5 |
| M Series | Nut ER 11 M, balanced | 16 | 12 | M13×0.75 |
| M Series | Nut ER 16 M, balanced | 22 | 18 | M19×1 |
| M Series | Nut ER 20 M, balanced | 38 | 19 | M24×1 |
| M Series | Nut ER 25 M, balanced | 35 | 20 | M30×1 |
| UM Series | Nut ER 16 UM, balanced | 28 | 17 | M22×1.5 |
| UM Series | Nut ER 20 UM, balanced | 34 | 19 | M25×1.5 |
| UM Series | Nut ER 25 UM, balanced | 42 | 20 | M32×1.5 |
| UM Series | Nut ER 32 UM, balanced | 50 | 22 | M40×1.5 |
Who We Are?
About Ever Source
Shanghai Ever Source International Trade Co., Ltd. was established in 2003, mainly engaged in corporation with European and American countries. We understand the strict requirements of European and American customers on product quality and delivery speed better than most factories in China. Because we fully understand the advantages and drawbacks of different domestic factories, we can supply the most cost-effective products for foreign customers to meet the needs of different customers. Help customers save time and improve efficiency. And always recommend the latest products in the Chinese market to our customers. Through our screening and quality inspection by professional engineers, we can ensure that any product or service you purchase from our company is worth the money.
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Our product certification, LeadShine’s authorization certification, and corporate qualifications
FAQ
Frequent Asked Question
Thank you for your interest in our products! If you have more questions, please contact us. We look forward to assisting you!
When can you get in touch with us?
*Our worktime is during 9:00 AM to 6:00 PM (UTC+8) on workdays. You can also contact us without hesitation after worktime. We will reply you as soon as possible.
How can we ensure our product quality?
*Our product will be the same quality as the specification induction. We will also test the product before delivering. If you want, we can also send you the testing video.
How can we send the cargo?
*We will choose the logistics method according to your requirements. But at the same time, we also cooperate with Fedex, and we can offer very low Fedex prices, but you need to confirm the details with us before placing an order.
How to place order?
*1: You can fill in your requirement in inquiry system. We will send you the quotation after receiving your inquiry. 2: You can consult our website’s customer service for products, and we will patiently answer your questions.
FAQ
Frequent Asked Question
Thank you for your interest in our products! If you have more questions, please contact us. We look forward to assisting you!
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