Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of super precision bearings b71902-c-2rsd-t-p4s 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.
Angular Contact Ball Bearing-Super Precision Bearings-B71902-C-2RSD-T-P4S
Also know as S71902CDP4A, B71902-C-2RSD-T-P4S-DT, KH61902CTAP4DT, H71902C-2RZDB/DTP4
Technical Data
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Inside Ø (mm): |
15 |
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Outside Ø (mm): |
28 |
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Width (mm): |
7 |
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Contact Angle: |
15° |
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Rows Of Balls: |
Single Row |
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Seal: |
NBR |
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Ring Material: |
GCr15, 100Cr6, SUJ2, X30 |
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Rolling Element Material: |
Steel |
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Cage Material: |
Phenolic Resin |
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Tolerance Class: |
P4S |
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Lubrication: |
Greased with Lubcon L252 |
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Type of lubrication: |
Grease |
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Product weight: |
0.015 kg |
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Type |
Shaft -Ø |
Dimensions in mm |
Contact angle |
Weight |
||||||||||
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in mm |
D |
B |
c |
Da |
da |
r (min) |
r1 (min) |
ra (max) |
ra1 (max) |
(kg) |
||||
|
71900-C-2RZ-P4 |
10 |
22 |
6 |
6.7 |
19.5 |
13 |
0.3 |
0.1 |
0.3 |
0.1 |
15° |
0.01 |
||
|
71901-C-2RZ-P4 |
12 |
24 |
6 |
7.2 |
21.5 |
15 |
0.3 |
0.1 |
0.3 |
0.1 |
15° |
0.011 |
||
|
71902-C-2RZ-P4 |
15 |
28 |
7 |
8.5 |
25.5 |
18 |
0.3 |
0.1 |
0.3 |
0.1 |
15° |
0.017 |
||
Features
The B71902-C-2RSD-T-P4S is a compact ultra-precision single-row angular contact ball bearing from the high-end 719 thin-section bearing series. Its slim thin-wall structure reduces radial installation size while preserving rigid rotary performance, offering a lightweight, space-saving precision support solution that outperforms standard 7000-series bearings. This cross-standard precision bearing is marketed under multiple interchangeable part numbers, including S71902CDP4A, B71902-C-2RSD-T-P4S-DT, KH61902CTAP4DT and H71902C-2RZDB/DTP4. Fully compliant with international precision machinery standards, it enables direct cross-brand substitution and seamless compatibility for global equipment maintenance and performance upgrades.
Ultra-Stable Dynamic Precision & Long-Term Non-Attenuation Performance
Moving beyond overused generic precision bearing descriptions, this model provides scenario-tailored performance for miniature high-precision rotary systems. It maintains outstanding dynamic stability under micro-loads and light alternating load conditions. The refined ball-raceway contact structure eliminates localized stress concentration, supporting steady high-frequency intermittent rotation without accuracy fluctuation. Benefiting from low thermal expansion matching properties, it limits long-term precision deviation within 0.5μm after 10,000 hours of continuous operation, sustaining non-attenuating precision far better than conventional heat-drift-prone precision bearings.
Ultra-Low Vibration & Energy-Saving Operational Performance
Specifically optimized to overcome inherent micro-vibration issues of thin miniature bearings, this product achieves ultra-quiet, jitter-free rotation via ultra-fine raceway grinding, high-grade steel ball sorting and precise clearance matching. Its vibration level is substantially lower than standard P4 industry thresholds, fully meeting the rigorous low-noise demands of optical and medical precision equipment. Additionally, the low-friction sealing system and lightweight cage reduce power consumption by 8%–12% compared with equivalent models, supporting energy-saving, long-cycle continuous operation for precision automation systems.
Compact Structural Adaptability & Superior Environmental Durability
Its slim lightweight structure solves the spatial installation bottleneck of standard precision bearings in miniaturized high-end equipment. Enhanced by integral reinforced heat treatment, the bearing boasts improved contact fatigue resistance and structural durability, delivering excellent environmental adaptability. It retains stable dimensional accuracy and rotary performance across a wide temperature range of -20℃ to +120℃, effectively resisting thermal deformation, abnormal wear and precision failure caused by frequent temperature fluctuations in precision processing and testing environments.
HXB Spindle Bearing Suffix Code
For Example
HX7005CTA-2RZHQDB/DTP4
- H: ultra-high speed
- X: X30 material
- C: 15°
- T: phenolic resin
- A: outer ring guided
- 2RZ: double non-contact rubber seals
- HQ1: roller Si3N4
- DB/DT: match
- L: light preload
Applications
- High-speed PCB micro-drilling and routing spindles for electronic precision processing;
- Medical high-speed dental handpieces and miniature surgical power rotary tools;
- High-precision laser scanning galvanometers and miniature optical zoom rotary modules for optical inspection equipment;
- Micro high-frequency spindles for semiconductor chip testing and dispensing automation equipment;
- Miniature joint servo rotary units for compact collaborative robots and micro-precision positioning actuators. It provides a cost-effective, high-stability and long-life precision rotary solution for upgrading miniature ultra-precision rotary systems in high-end precision manufacturing fields.
Material of Bearing Components
The super precision bearing is a specially designed angular contact ball bearing consisting of an inner ring. An outer ring, a cage, a set of rolling elements and optional grease and seals. According to the customer's use and working conditions, we will provide the corresponding parts materials to achieve the best performance of the bearing.
- Non-contact Seals Both Sides
- The Balls are Made of Silicon Nitride (Ceramic) Which Permit a Significant Increase in Speed
- Contact Angles of 15° and 25° Permit Significantly-higher Axial Forces and Improved Rigidity
- Rings are Made of High Quality GCR15
- Window Cage Made of Reinforced Phenolic or High-performance Plastic for Special Applications
- High-performance Lubricants Ensure High Speeds and a Long Lifetime
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.
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 kind of application scenarios is the B71902-C-2RSD-T-P4S bearing suitable for? A: Unlike conventional 719-series bearings designed for general industrial use, the B71902-C-2RSD-T-P4S is professionally optimized for miniaturized, high-cleanliness, ultra-precision and long-service-life critical high-end precision scenarios. It is specially tailored for precision equipment that requires ultra-stable rotation, low vibration and long-term consistent accuracy, covering optical systems, medical instrumentation, semiconductor microelectronics and miniature precision robotic equipment.
Q2: What are the typical precision equipment applications of this bearing? A: In ultra-precision optical systems, it serves as the core rotary support for miniature zoom modules, laser fine-tuning shafts and high-speed scanning galvanometers, eliminating optical jitter and ensuring precise angle control and stable optical signal transmission. In medical precision instrumentation, it is widely used in miniature surgical power tools, high-speed dental handpieces and in-vitro diagnostic rotary components, with a double-sided anti-contamination structure that meets medical-grade cleanliness standards and supports long-term stable low-noise operation. In semiconductor and microelectronics automation, it applies to miniature high-speed spindles for chip testing equipment, precision dispensing transmission shafts and micro-processing high-frequency rotary units, ensuring high-precision and high-efficiency microelectronic production and inspection.
Q3: What advantages does it have in miniature precision robot and servo systems? A: The slim and lightweight structural design greatly reduces the rotary inertia of miniature robotic joints and micro servo rotary units, effectively improving equipment response sensitivity and motion positioning accuracy. More importantly, its excellent long-term precision non-attenuation performance avoids frequent equipment calibration, significantly reducing daily maintenance costs and equipment downtime, and comprehensively improving the overall operational stability and service life of precision automation systems.
Q4: Does the B71902-C-2RSD-T-P4S support cross-model replacement and universal matching? A: Yes. This bearing features full multi-standard compatibility and can directly replace mainstream equivalent models such as S71902CDP4A and KH61902CTAP4DT, perfectly adapting to global precision equipment maintenance and upgrade needs. Equipped with factory DT pre-pairing calibration, upgraded P4S ultra-precision tolerance and 2RSD double-sided full sealing protection, it is a high-performance upgraded alternative to ordinary 71902 precision bearings.
Q5: What core problems can this upgraded precision bearing solve? A: It effectively makes up for the inherent shortcomings of traditional ordinary 71902 bearings, including insufficient sealing and anti-pollution ability, easy precision attenuation after long-term operation and complicated on-site assembly and pairing processes. It provides a cost-effective, high-stability and long-life precision rotary solution for the upgrading and iteration of miniature ultra-precision rotary systems in high-end precision manufacturing fields.
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