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HRB Bearings With C3 Clearance for Precision Machine Tools
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HRB C3 clearance bearings ensure stable operation in high-speed/precision machine tools by accommodating thermal expansion. Manufactured from hardened chromium steel to ABEC-1/P0+ tolerances, they reduce vibration, prevent seizure, and extend equipment life. ISO9001/TS16969 certified quality. Global export via Shanghai/Guangzhou ports. Custom sizes & configurations available.
Negotiable
MOQ: 1000 Sets (Price negotiable depending on order volume and customization)
Key Specifications
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Brand:
HRB
Clearance Grade:
C3
Application:
Precision Machine Tools
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
7 days
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Brand
HRB
Clearance Grade
C3
Application
Precision Machine Tools
Material
High Carbon Chromium Steel
Certifications
ISO9001, ISO14000, TS16969
Port of Shipment
Shanghai, Guangzhou
Packaging
Industrial Export Standard
Origin
China
MOQ
Customizable
Delivery Time
Based on order quantity
As Beijing SKF Bearing Trading Co., Ltd., a specialized exporter since 2019, we deliver engineered solutions for demanding industrial applications. Our HRB Bearings with C3 Clearance are precision-engineered components essential for maintaining accuracy in high-performance machine tools. With a focused team and strategic global reach across North America, Europe, Asia, and beyond, we ensure reliable bearing solutions that meet rigorous international standards. These bearings represent our commitment to providing components that directly enhance manufacturing precision and equipment longevity.
Core Technical Advantages:
- Optimized Internal Clearance: C3 designation indicates greater radial internal clearance than standard bearings, specifically designed to accommodate thermal expansion in high-speed or high-temperature machining operations, preventing binding and premature failure.
- Precision Grinding: Manufactured to ABEC-1/P0 tolerances or higher (upon request), ensuring consistent dimensional accuracy and smooth rotation critical for surface finish quality in milling, grinding, and turning centers.
- Robust Construction: Forged from high-carbon chromium steel (GCr15 equivalent) and heat-treated to achieve a core hardness of 58-62 HRC, providing exceptional resistance to deformation under heavy radial and axial loads.
- Enhanced Lubrication Retention: Features optimized cage design and raceway geometry to maintain effective lubricant film, reducing friction and wear even during extended operational cycles.
- Vibration Damping: Precision manufacturing minimizes internal inconsistencies, contributing to lower noise and vibration levels in sensitive CNC equipment.
Key Performance Specifications:
| Parameter | Detail |
| Typical Sizes (ID) | 20mm - 120mm (Wider range customizable) |
| Operating Temp Range | -30°C to +120°C (Standard) |
| Basic Dynamic Load (C) | Varies by size (e.g., 10-50kN+) |
| Basic Static Load (C0) | Varies by size (e.g., 5-30kN+) |
| Limiting Speed (Grease) | Varies by size & design |
Client Benefits:
- Reduced Machine Downtime: C3 clearance prevents thermal seizure, minimizing unplanned stops in continuous operations.
- Extended Component Life: Superior material and construction resist wear, reducing replacement frequency and maintenance costs.
- Improved Machining Accuracy: Consistent rotational precision ensures tighter tolerances on finished workpieces.
- Lower Operational Costs: Efficient design and durability decrease energy consumption and part replacement expenses.
Backed by our ISO9001, ISO14000, and TS16969 certified quality management systems, Beijing SKF Bearing Trading leverages its established export channels through Shanghai and Guangzhou ports to serve clients globally across North America, Europe, Southeast Asia, and other key industrial regions. Our annual export volume of US$1 Million - US$1.5 Million demonstrates consistent reliability. We understand the critical role precision bearings play in your machinery's performance. Invest in HRB C3 bearings for enhanced machine tool reliability and output quality. Contact us today for specific technical requirements or competitive quotations.
Frequently Asked Questions (FAQ):
-
Q: Why is C3 clearance specifically important for precision machine tools?
A: Machine tools generate significant heat during high-speed operations. C3 clearance provides extra space to accommodate thermal expansion of the shaft and housing, preventing preload buildup that causes friction, heat generation, increased wear, and potential bearing lockup, thus protecting accuracy. -
Q: Can these bearings handle both radial and axial loads common in machining?
A> Yes. While primarily designed for radial loads, deep groove ball bearings like these HRB units can accommodate moderate axial loads in either direction, making them suitable for the combined forces encountered in spindles and feed screws. -
Q: What lubrication is recommended, and what are the relubrication intervals?
A> High-quality lithium complex grease (NLGI 2) is commonly used. Specific intervals depend on operating speed, temperature, and environment. Consult the bearing's technical datasheet or our engineers for application-specific guidance; sealed variants offer maintenance-free operation. -
Q: Are custom sizes or configurations available beyond the standard range?
A> Yes. As a trading company with strong manufacturing partnerships, we can facilitate requests for non-standard bore diameters, widths, special seals (RS, 2RS, Z, ZZ), or specific pre-greasing quantities. Minimum order quantities apply for custom orders. -
Q: How does HRB brand quality compare internationally?
A> HRB is a major Chinese bearing manufacturer known for producing reliable industrial bearings meeting international dimensional standards (ABEC, ISO, DIN). They are widely used in demanding applications globally, offering a strong balance of performance and value. -
Q: What documentation accompanies shipment?
A> Standard shipments include Commercial Invoice, Packing List, and Bill of Lading/Airway Bill. Certificates of Origin and Material Certificates (including traceability) are available upon request. Copies of relevant ISO certificates for our trading operations can also be provided. -
Q: What is the typical lead time for standard sizes?
A> For standard HRB C3 bearings in common sizes, lead times typically range from 15 to 30 days ex-stock or from factory, subject to current inventory levels and order quantity. Expedited options may be available.
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Business Type
Trading Company
Year Established
2019
Overseas Office
Yes
Factory Size
Below 1,000 square meters
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