Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of angular contact ball bearings h7003c-2rzdtp5 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.
Precision Angular Contact Ball Bearings H7003C-2RZDTP5
Technical Data
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Inside Ø (mm): |
17 |
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Outside Ø (mm): |
35 |
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Width (mm): |
10 |
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Contact Angle: |
15° |
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Rows Of Balls: |
Single Row |
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Seal: |
Rubber |
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Ring Material: |
GCr15, 100Cr6, SUJ2 |
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Rolling Element Material: |
Steel |
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Cage Material: |
Phenolic Resin |
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Tolerance Class: |
P5 |
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Type of lubrication: |
Grease |
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Product weight: |
0.037 kg |
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Exchange |
7003CTRV1VP5 (NSK), S7003CD/P5, B7003C-2RSD-T-P5 |
The H7003C-2RZDTP5 high-speed angular contact ball bearing is a core model specially optimized for the machine tool spindle repair and replacement market. It features high speed, low vibration, sealed dustproof structure and stable precision retention, fully matching the maintenance and overhaul demands of ordinary and medium-precision CNC spindles, engraving machine spindles and mechanical spindle rotating units.
Applications
Spindle repair market chooses P5 precision:
Matched with worn spindle base: Repaired spindles have minor wear, tiny coaxial deviation and clearance loss on shafts and housing holes. The marginal precision advantage of P4 will be offset by existing equipment wear, making P4 precision redundant.
Cost-effective maintenance solution: P5 precision fully meets the operating requirements of most medium-precision repaired spindles, including daily high-speed rotation, machining stability and low vibration performance. It avoids the excessive cost of P4 ultra-precision bearings without compromising repair quality.
Lower assembly threshold: P4 bearings require extremely strict assembly coaxiality, preload control and mounting environment. P5 precision has better tolerance compatibility, adapting to the assembly conditions of after-sales repair and on-site overhaul.
Practical performance matching: For refurbished spindles used for conventional milling, drilling and cutting, P5 precision provides completely qualified rotational accuracy and service life, achieving the best balance of performance and cost for repair scenarios.
3.1 Cleaning & Environment Control
Keep the assembly environment dust-free and dry. Thoroughly clean the spindle shaft, housing hole and mounting positioning surface to remove old grease, iron filings and impurities. Foreign particles will cause vibration, noise and premature wear of the new bearing.
3.2 Matching & Installation Tolerance
Strictly check the shaft and housing tolerance. Avoid forced pressing during installation to prevent bearing deformation and precision loss. Ensure uniform stress during assembly to guarantee original rotational accuracy of the bearing.
3.3 Preload Setting (Core Step)
H7003C angular contact bearings rely on precise preload to eliminate internal clearance. Set standard light/medium preload according to spindle speed and load conditions. Excessive preload will cause overheating and shorten service life; insufficient preload will lead to runout and vibration.
3.4 Grease Filling Standard
This 2RZ sealed bearing adopts internal pre-greasing design. Do not overfill or mix different types of grease. Keep uniform grease content to ensure stable high-speed lubrication and avoid coking and heat generation.
3.5 Running-in Test After Replacement
After installation, perform low-speed running-in first, then gradually increase the speed. Check for abnormal noise, temperature rise and spindle runout deviation. Confirm stable operation before formal machining use to eliminate assembly hidden dangers.
3.6 Avoid Mixed Precision Matching
Do not mix P4 and P5 bearings in the same spindle group. Unified P5 precision pairing ensures consistent stress and rotational synchronization, preventing precision deviation and unilateral accelerated wear.
HXB Introduction
Established in 1995, as a leading ball bearing manufacturer in China, HXB offers more than 1,000 kinds of ball bearing to fulfill our customers' needs. With excellent production team and technical team, we can supply high quality products consistently.
Our production capacity:
- Deep groove ball bearings: 34 production lines, 30,000,000pcs per year
- Angular contact ball bearings: 14 production lines, 3,000,000pcs per year
Application fields: electric motors, pumps, textile machine, household appliance, machine tool spindle, CNC machine, healthcare industry, intelligence manufacturing etc.
Certificate: IATF16949:2016, ISO9001:2015
We uphold rigorous craftsmanship and innovative development, committed to delivering superior bearing solutions and creating long-term value for global partners.
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 angular contact ball bearings for your application.
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)
- 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.
Certificates
Exhibition
FAQ
1. Why is P5 precision fully qualified for spindle overhaul instead of blindly upgrading to P4?
Spindle repair targets used and worn spindle equipment, where slight shaft runout, housing tolerance deviation and structural wear already exist. The high-precision advantage of P4 bearings cannot be fully exerted and will be wasted. The P5 precision of H7003C-2RZDTP5 perfectly adapts to the tolerance range of refurbished spindles, fully meeting medium-precision machining and high-speed operation requirements, and achieving optimal cost-performance for repair scenarios.
2. What spindle repair scenarios are the H7003C-2RZDTP5 bearings suitable for?
This bearing is specially customized for after-sales spindle maintenance, applicable to overhaul and replacement of ordinary and medium-precision CNC spindles, engraving machine spindles and conventional mechanical spindles. It is ideal for daily milling, drilling and cutting equipment refurbishment, and is not recommended for ultra-precision new spindle assembly and high-end precision machining equipment.
3. What problems will occur if P4 and P5 precision bearings are mixed in one spindle?
Mixed installation of different precision bearings will cause inconsistent rotation accuracy and uneven internal stress distribution during spindle operation. It will lead to spindle runout deviation, obvious vibration and abnormal noise at high speed, and cause unilateral accelerated wear of bearings, greatly shortening the overall service life of the spindle assembly.
4. Why is professional preload adjustment the key to bearing replacement success?
Angular contact ball bearings rely on preload to eliminate internal clearance and ensure high-speed stability. Excessive preload will cause continuous bearing heating, grease coking and premature burnout; insufficient preload cannot eliminate rotation clearance, resulting in spindle jitter, runout and poor machining accuracy. Matching light or medium preload according to actual speed and load is essential for stable long-term operation.
5. Why strict cleaning is indispensable before bearing installation?
Spindle repair will inevitably produce iron filings, old deteriorated grease and dust impurities. If these contaminants remain on the shaft and housing mounting surface, they will enter the bearing interior after installation. This will cause abrasive wear, high-speed vibration, abnormal noise, and directly lead to early failure of the new replacement bearing.
6. What risks will forced installation bring to spindle bearings?
Forced pressing and uneven stress installation will cause permanent deformation of the bearing inner and outer rings, damage the raceway precision and internal structure. Although the spindle can rotate temporarily, the bearing will suffer severe runout, accelerated wear and rapid precision failure in subsequent high-speed operation, resulting in repeated maintenance.
7. Why is low-speed running-in necessary after bearing replacement?
Running-in can balance internal lubrication distribution, release tiny assembly stress and check potential installation abnormalities. Direct high-speed operation after replacement may trigger local overheating and vibration risks. Gradual speed-up operation can effectively verify installation quality and ensure the spindle meets formal machining operation standards.
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