Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of ultra high-speed angular contact ball bearings 50bnr10h in China. As we have world-leading production equipment and strong manufacturing capabilities, we warmly welcome you to buy bulk high quality bearings at competitive price from our factory.
Ultra High-speed Angular Contact Ball Bearings-50BNR10S
Also supply: 50BNR10STYNDBLP4, 50BNR10STYDBELP4, 50BNR10STYNSULP4
Technical Data
The 50BNR10H belongs to NSK ROBUST BNR series ultra-high-speed super-precision angular contact ball bearings. It is widely used for high-end ultra-high-speed spindles. We provide fully interchangeable structural counterparts with identical dimensions, contact angle, precision grade and high-speed performance. Below is the full technical parameter and professional analysis of the BNR series exclusive angle design.
|
Item |
Parameter |
|---|---|
|
Model |
50BNR10H |
|
Bore / Outer Dia / Width |
50 mm × 80 mm × 16 mm |
|
Contact Angle |
18° (BNR exclusive angle) |
|
Structure |
Hybrid ceramic ball (Si₃N₄) + steel rings, ultra-high-speed sealed structure |
|
Precision Grade |
P3 / P4 optional (super precision) |
|
Max Speed (Oil-air lubrication) |
22,000 rpm+ |
|
Cage Type |
TYN ball-guided high-stability resin cage |
Features
Coding Definition
BNR: NSK ROBUST ultra-high-speed special series, customized with 18° low contact angle, dedicated for extreme high-speed spindle scenarios
10: Dimension series code for ultra-thin high-speed spindle bearing
H: Hybrid ceramic ball configuration (Si₃N₄ ceramic rolling elements)
Why Adopt 18° BNR Special Contact Angle (Core Design Advantage)
Most standard angular contact bearings adopt 15° / 25° contact angles. The BNR series adopts a unique 18° optimized contact angle to balance ultra-high-speed performance and running rigidity, which is the key design difference from ordinary spindle bearings:
Extreme high-speed adaptability (core advantage) Compared with 25°/30° large contact angle bearings, the 18° contact angle effectively reduces axial component force and rolling friction resistance. It greatly lowers heat generation and centrifugal friction under ultra-high RPM, supporting continuous stable ultra-high-speed operation and achieving a far higher DN value than standard-angle bearings.
Balanced radial & axial rigidity 15° contact angle features weak axial load capacity, while 25° angle causes excessive axial friction. The 18° medium optimized angle perfectly balances radial support stiffness and axial tension resistance, avoiding insufficient rigidity or excessive heat generation.
Minimal thermal deformation & stable preload The 18° contact track design optimizes ball rolling contact state, uniformizes stress distribution, and effectively suppresses thermal drift during long-time high-speed operation. It maintains consistent spindle preload and precision stability.
Lower vibration & longer service life Optimized contact geometry reduces rolling element sliding friction and contact fatigue, lowering high-speed resonance and noise. It significantly improves durability under ultra-high-speed cyclic working conditions.
Applications
Ultra-high-speed machining center spindles, high-speed grinding spindles, precision milling spindles, 3C ultra-fine processing equipment, medical precision processing spindles and high-end automated ultra-high-speed rotating units.
Design and Development Capabilities
HXB has a set of more than 10 years of technical optimization precipitation, with the international advanced development concept of the development process, with the ability of design analysis, engineering production, test evaluation and technical management.
It has dozens of national patents. The technicians are proficient in using computer aided design software. PLM system is being progressively implemented.
Experimental Testing / Testing Ability
HXB has a comprehensive laboratory (including durability, physical and chemical, high and low temperature cycle, enamel-wire laboratory, performance, gear, magnetic observation room), with dozens of various equipment and instruments, with the ability to test and verify the performance of new products and components such as magneto, starter motor, generator electronic products. We will support you in selecting the best spindle bearings for your application.
HXB Introduction
Founded in 1995, HXB Bearing Brand has accumulated 30 years of experience in precision bearing manufacturing. Two high-tech R&D centers drive continuous technical upgrading, while two intelligent factories in Hangzhou and Huzhou undertake mass production, with six subsidiaries improving upstream and downstream supporting chains. Real-time precision monitoring is realized on digital production lines, and complete qualification of international system certifications is held. Its flagship products include spindle bearings for CNC engraving machines and angular contact ball bearings, with an annual output of 3 million sets exported to Europe, America and Southeast Asia. It supplies supporting bearings for Siemens and John Deere and can customize bearings for non-standard working conditions.
Advantages
HXB was founded in 1995, with nearly 30 years of dedicated development, HXB now operates6 subsidiaries.
∗ 2 high-tech R&D centers
∗ 2 modern manufacturing factories - Hangzhou Yijia Precision Bearing Co., Ltd. and Zhejiang Ruiyang Bearing Technology Co., Ltd.
∗ Supported by advanced digital MES and SPC management systems
∗ IATF16949:2016, ISO9001:2015 and ISO14001 certifications
∗ High-end equipment and high-quality material
About HXB
1. Hangzhou Factory - YJB
Founded in June 2007, YJB is located in Hangzhou. As a subsidiary of HXB Group, we are a national high-tech enterprise and provincial science & technology enterprise specializing in R&D and manufacturing of high-precision, high-speed, advanced, special and professional bearings.
Core Capabilities & Intelligent Manufacturing
- Product Size: Inner diameter Φ3–Φ300mm
- Precision Classes: P2, P4 (ultra-precision grades)
- Annual Capacity: 3 million sets of precision bearings in a lean & intelligent factory
- Equipment Investment: Over RMB 3 million in world-leading precision testing instruments
- Digital Transformation: with full deployment of MESYS bearing design platform, ERP, MES, WMS, SPC real-time quality monitoring and OA systems, building a benchmark smart manufacturing plant.
Main Products
Precision Spindle Bearings
Angular Contact Ball Bearings
Servo Motor Bearings
Vacuum Pump Bearings
Ball Screw Support Bearings
2. Huzhou Factory
In 2021, the deep groove ball bearing factory relocated from Hangzhou to Huzhou. It operate in a 10,000㎡ production facility with a team of 75 employees, focused on the R&D, and manufacturing of high-performance deep groove ball bearings.
We maintain a professional engineering and quality system to ensure stable precision and reliability.
Engineering Team: 4 bearing design & process engineers, accounting for 5% of staff.
Quality Team: 15 quality personnel, including 2 quality engineers, 20% of staff, covering incoming inspection, in-process control and final testing.
Product Range
Series: 6000–6024, 6200–6214, 6300–6314, 6800–6824, 6900–6924
Features: High rigidity, low noise; suitable for grease lubrication or oil-mist lubrication.
6 Series X4YA-2RS (Double-lip seal) & APT Retainer Series
Features: High & low temperature resistance, superior sealing, high load capacity, long service life.
Application: New energy vehicle transmission systems.
Certificates
Exhibition
FAQ
Q1: What makes the 50BNR10H BNR series different from standard 7000 series spindle bearings?
Unlike conventional angular contact bearings with fixed 15° or 25° contact angles, the 50BNR10H adopts a custom 18° optimized contact angle exclusive to the BNR ROBUST series. Combined with Si₃N₄ hybrid ceramic balls and a dedicated high-speed resin cage, it prioritizes extreme high-speed stability and low heat generation. Standard bearings focus on balanced load capacity, while the BNR series is professionally tailored for ultra-high-speed spindle scenarios, delivering a higher DN rating and better long-cycle precision retention.
Q2: What is the core benefit of the BNR series 18° special contact angle design?
The 18° contact angle achieves an optimal balance that standard angles cannot match. It avoids insufficient axial stiffness of 15° bearings and excessive rolling friction & heat accumulation of 25° bearings. This unique design minimizes sliding friction during high-speed rotation, uniformizes contact stress distribution, and effectively suppresses thermal drift, ensuring stable preload and zero precision attenuation during long-duration ultra-high-speed operation.
Q3: Why is 50BNR10H classified as an ultra-high-speed dedicated spindle bearing?
This model integrates multiple high-speed optimized configurations. The low-density Si₃N₄ ceramic balls reduce centrifugal force at high RPM, while the 18° contact angle cuts rolling resistance. Matched with a ball-guided TYN resin cage and super-precision P3/P4 tolerance standards, it supports sustained ultra-high-speed operation over 22,000 rpm under oil-air lubrication, far exceeding the speed limit of ordinary all-steel and standard-angle precision bearings.
Q4: Can your interchangeable 50BNR10H bearings fully match the original NSK high-speed performance?
Yes. Our alternative bearings adopt a 1:1 replicated BNR exclusive structure, including the standard 18° optimized contact angle, genuine Si₃N₄ ceramic rolling elements, high-stability TYN cage and ultra-high-speed sealing structure. With consistent super-precision grades and mounting dimensions, it achieves identical high-speed stability, low-temperature rise and precision durability, realizing full functional interchangeability with the original NSK 50BNR10H.
Q5: What working conditions are suitable for the 50BNR10H BNR series bearings?
This series is exclusively designed for ultra-high-speed, high-precision, long-cycle continuous operation scenarios. It is ideal for ultra-high-speed machining center spindles, high-precision grinding and milling spindles, 3C industry ultra-fine processing equipment, medical precision processing spindles and high-end automated high-speed rotating units. It performs best in low-load, high-speed precision cutting and finishing working conditions.
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