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.01 Comprehensive Customization:
We provide full-process customization services from product design, material selection, sample making to mass production to meet customers' special specifications and functional requirements.
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View All →Flanged Bearing Solutions
Two Bolt Flange Ball Bearings For Reliable Equipment Mounting
Engineered for direct mounting on equipment frames and support structures, these two bolt flange ball bearings deliver exceptional precision and vibration control. Perfect for pump housings, motor mounts, and industrial machinery requiring secure pillow block installation.
Two Bolt Flange Design Chrome Steel Construction P5/P6 Precision Grade -30~100°C Temp Range Heavy Duty Load Capacity
Request Quote →Flanged Bearing Solutions
Engineering Excellence in Flange Design
Two bolt flange ball bearings represent a significant engineering advancement in equipment mounting solutions. Unlike standard deep groove bearings that require complex mounting hardware, our flanged designs integrate the mounting points directly into the bearing structure, eliminating installation complexity and reducing assembly time by up to 40%. The two-bolt configuration provides ideal spacing for standard mounting holes on pump casings, motor frames, and industrial machinery chassis commonly found in manufacturing environments.
The flange design engineering demands specialized precision in both the bearing raceway and the mounting interface. Our manufacturing process begins with premium GCr15 chrome steel that undergoes vacuum heat treatment to achieve uniform HRC 58-62 hardness. The flange itself is precision-machined to ensure perpendicular alignment with the bearing bore, critical for preventing binding and premature wear. Advanced CNC equipment maintains bore concentricity within 0.005mm and flange flatness within 0.02mm—tolerances that prevent the shimming and adjustment problems that plague lower-quality flanged bearings.
The two-bolt spacing on our flanges is engineered to accommodate the most common industrial standards: both ISO metric spacing and NEMA spacing for North American equipment. This universal compatibility means our bearings can retrofit existing equipment from multiple manufacturers without custom fabrication. The flange bolt holes are pre-drilled with countersinks to prevent stress concentration and ensure even load distribution across both mounting points. Surface hardness treatment on the flange ensures resistance to corrosion from lubricant oxidation and environmental exposure.
Installation reliability depends critically on proper sealing and lubrication accessibility. Our two-bolt flanged bearings feature strategically positioned grease fittings and labyrinth seals that prevent contamination while permitting periodic re-lubrication without disassembly. The bearing is pre-loaded with premium ISO VG 100 grease suitable for -30°C to +100°C operation. In high-temperature applications, we offer synthetic PAO grease rated to +120°C. This attention to lubrication ensures that equipment operators can maintain bearing performance through simple periodic maintenance rather than replacement.
Technical Data
Two Bolt Flange Specifications
Comprehensive technical reference for reliable equipment mounting applications.
Material & Composition
Material GradeGCr15 Chrome Steel
Flange DesignTwo Bolt Perpendicular Mounting
Bolt Hole DiameterM12 / M14 / M16
HardnessHRC 58 - 62
Flange Flatness±0.02mm
Bore Concentricity±0.005mm
Performance Characteristics
Precision GradeP5, P6 (ABEC-5, 3)
Noise LevelZ2, Z3
Temperature Range-30°C to +100°C
Max Speed12,000 RPM
Grease TypeISO VG 100 / PAO Synthetic
Sealing OptionsLabyrinth / 2RS
Use Cases
Ideal Applications
Industries where direct flange mounting simplifies assembly and improves reliability.
Pump Motor Mounting
Centrifugal pump housings and motor coupling bearings rely on flange design for alignment without shims or adjustment hardware.
Industrial Compression Equipment
Air compressors, vacuum pumps, and industrial blowers utilize flanged bearings for direct shaft support and vibration isolation.
Conveyor System Support
Conveyor drive shafts and idler rollers use two-bolt flanges for secure frame mounting in high-throughput logistics operations.
Machine Tool Spindles
CNC machine tools and precision grinding equipment employ flanged bearings for runout control and thermal stability.
HVAC & Ventilation Systems
Centrifugal fans and air handling units depend on flanged bearings for simplified ductwork integration and maintenance access.
Power Generation Equipment
Turbine support bearings, generator shaft mounts, and auxiliary equipment use flanged designs for critical alignment requirements.
Why Two-Bolt Flanges?
Superior Advantages
Simplified assembly meets industrial-grade reliability.
40%
Assembly Time Reduction
Eliminates shimming, separate mounting brackets, and alignment adjustments—bearings mount directly to equipment frames with standard bolts.
99.2%
Runout Control
Precision flange engineering maintains bore concentricity within ±0.005mm, ensuring vibration-free operation and extended equipment life.
25,000+
Operating Hours
Heavy-duty construction and proper sealing enable 25,000+ hours of maintenance-free operation in industrial environments.
Universal
Compatibility
Two-bolt spacing accommodates both ISO metric and NEMA standards, enabling retrofit installation on existing equipment worldwide.
Shipping & Payment
Global logistics for two-bolt flange bearing orders.
Payment Terms
T/T (Wire Transfer): 30% deposit, balance upon shipment.
L/C at Sight: Accepted for orders above 3,000 pieces.
Bank Transfer: Available for established accounts.
Shipping Methods
Sea Freight: FCL/LCL from Ningbo/Shanghai for bulk orders.
Air Express: DHL/FedEx for urgent flange bearing samples.
Lead Time
Standard Sizes: 15 – 25 days.
Production Orders: 25 – 35 days.
Custom Flange Spacing: 35 – 50 days.
Frequently Asked Questions
Expert answers about two-bolt flange ball bearings.
Q: What is the difference between a two-bolt and four-bolt flange bearing?
A: Two-bolt flanges are designed for simpler, lighter-duty applications with standard mounting spacing. Four-bolt flanges provide wider base support for heavy-duty machinery. We manufacture both; two-bolt is ideal for pumps and fans, while four-bolt suits industrial compressors and turbines.
Q: Can two-bolt flanged bearings replace pillow block bearings?
A: Yes, in many applications. Flanged bearings mount directly to equipment frames, while pillow blocks require separate support structures. Flanged design saves installation cost and assembly time, but requires direct equipment access.
Q: What is the typical service life of two-bolt flanged bearings?
A: With proper maintenance (annual re-lubrication) and normal operating conditions, service life typically reaches 15,000-25,000 operating hours. Heavy-duty applications with synthetic grease can achieve 30,000+ hours.
Q: Do flange mounting bolts affect bearing performance?
A: Yes. Proper bolt torque (typically 45-65 N·m for M12) ensures flange flatness and even load distribution. Over-tightening distorts the flange and creates binding; under-tightening allows vibration. We provide torque specifications with each order.
Q: What causes flange bearing runout and wobbling during operation?
A: Runout typically results from improper flange flatness (loose manufacturing tolerance), misalignment of mounting holes, or incorrect bolt torque. Our precision manufacturing maintains ±0.02mm flange flatness, and we provide detailed installation instructions to prevent this issue.
Q: Can you manufacture custom two-bolt flange spacing?
A: Yes. We can customize bolt hole positions to match your equipment's specific mounting pattern. This requires engineering drawings and extends lead time to 40-50 days, with a minimum order of 200 pieces.
Q: How should flange bearings be sealed for high-humidity environments?
A: We recommend 2RS (rubber seal) option with labyrinth design for maximum protection in humid or dusty conditions. For food processing or marine applications, we offer stainless steel flanged bearings with enhanced sealing.
Q: What is the maximum RPM for two-bolt flanged bearings?
A: Standard flanged bearings are rated to 12,000 RPM. For higher-speed applications (15,000+ RPM), we offer lightweight titanium-reinforced flanges and low-friction ceramic hybrid variants.
Q: What is the minimum order quantity for two-bolt flanged bearings?
A: Standard MOQ is 100 pieces for stocked sizes. Sample quantities of 10-20 pieces are available at 35% premium pricing for equipment manufacturers evaluating new suppliers.
Q: Do you provide installation guides and maintenance documentation?
A: Yes. We provide comprehensive installation guides with torque specifications, maintenance schedules, and troubleshooting procedures in English, Chinese, Spanish, and German.
Q: Can flanged bearings be laser-marked with custom branding?
A: Yes. We offer laser marking of model numbers, batch codes, or customer logos on flanges for orders above 500 pieces. Marking does not compromise bearing function or material properties.
Q: Are test certificates available for quality assurance verification?
A: Yes. We provide dimensional inspection reports, vibration test data (S0910 standard), and hardness certification for every order. Additional certifications (ISO 13485 for medical, DNV-GL for marine) are available upon request.
General Information
Key specifications and ordering details.
| MOQ | 100 Pieces (Samples: 10 pcs) |
| Lead Time | 15 – 35 Days |
| Packaging | Standard Cartons / Vacuum-Sealed Tubes |
| Certifications | ISO 9001 / IATF 16949 / CNS 5901 |
| Materials | GCr15 Chrome Steel / Stainless 304 |
| Customization | Custom Flange Spacing, Sealing, Bore Size |
ABOUT US
Zhejiang Yingfei Biotechnology Co., Ltd.
is China Two Bolt Flange Ball Bearings Manufacturers and Wholesale Two Bolt Flange Ball Bearings Factory that combines industry and trade. Its subsidiary, Ningbo Kaifei Machinery Technology Co., Ltd., has passed the GB/T 19001-2016/ISO 9001:2015 international quality system certification and is committed to producing precision bearings and fasteners made of stainless steel, carbon steel, and bearing steel. The company uses high-quality steel materials and implements fine craftsmanship production processes. It is a diversified and professional production base for casting in China, based on high-end and high-end markets, with an annual output of 2400000 sets. It is mainly exported to dozens of countries in Europe, America, Asia, Africa, and other regions, and is widely used in the fields of motors, home appliances, sports equipment, automobiles, mechanical rotation, furniture, strollers, water pumps, toys, etc. Our company adheres to the business philosophy of "paying attention to details, integrity, and efficiency". While developing, we continuously strengthen and enrich our company's technical strength, improve and perfect after-sales service, logistics distribution, and market promotion. Ensure high-quality products and a reliable reputation to serve domestic and international markets. Standardize oneself, be meticulous, strictly demand, and enhance the understanding and trust of partners. Establish good cooperative relationships with customers.
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10 YEARS INDUSTRY EXPERIENCE
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8700m² advanced factory
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15 high-tech professionals
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Annual production: 2.4 million sets
Quality Assurance
Precision Flange Manufacturing
Rigorous quality protocols ensure flange bearings meet industrial reliability and runout standards.
1
Precision Flange Machining
CNC equipment maintains bore concentricity within ±0.005mm and flange perpendicularity within ±0.01mm. Advanced probe systems verify geometry on 100% of flanges before heat treatment.
2
Vacuum Heat Treatment & Hardening
GCr15 steel undergoes vacuum induction hardening to achieve uniform HRC 58-62 throughout bearing and flange, eliminating soft spots that cause premature wear.
3
Final Flange Flatness Verification
Post-hardening, all flanges are ground flat to ±0.02mm tolerance and inspected with precision straightedges and dial indicators to ensure perfect assembly fit.
Testing & Certifications
Comprehensive testing protocols for flanged bearing reliability and mounting accuracy.
1
Runout & Wobble Testing
Precision dial indicators measure radial runout and flange wobble on rotating test fixture to validate ±0.005mm bore concentricity specification.
2
Flange Flatness Inspection
100% of flanges are checked with precision straightedges and feeler gauges to verify ±0.02mm flatness across entire mounting surface.
3
Noise & Vibration (S0910)
Automated vibration testing measures bearing noise across 10,000-12,000 RPM to confirm Z2/Z3 noise levels meet industrial equipment standards.
4
Dimension & Tolerance Verification
CMM (Coordinate Measuring Machine) inspection verifies bore diameter, width, flange dimensions, and bolt hole spacing against specifications within ±0.01mm.
5
Hardness Testing
Rockwell hardness testing (HRC) performed on bearing rings and flange to confirm HRC 58-62 specification across entire component.
6
Accelerated Fatigue Testing
Test bearings run at 1.5x rated load for 100+ hours with periodic particle analysis (ferrography) to validate rated service life claims.
Two-Bolt vs Pillow Block Comparison
Understand when flanged bearings are the ideal choice over traditional pillow blocks.
| Feature | Pillow Block Bearing | Two-Bolt Flange (Our Grade) |
|---|---|---|
| Installation Time | 30-45 minutes with bracket mounting | 5-10 minutes, direct flange mounting |
| Space Requirements | Requires separate support structure | Compact, direct frame mounting |
| Runout Control | ±0.02-0.03mm (shimming often needed) | ±0.005mm (precision flange design) |
| Material Cost | Lower unit cost | 15-20% higher, offset by labor savings |
| Total Installation Cost | High (labor + shimming + adjustment) | Lower (simplified assembly) |
| Vibration Performance | Variable (depends on installation quality) | Consistent (precision-engineered mounting) |
Expert Insight: Two-bolt flanged bearings eliminate the hidden costs of pillow block installation—engineer time for mounting design, technician labor for assembly, and field adjustments for alignment. In high-volume equipment manufacturing, flanged bearings reduce per-unit assembly cost by 25-35%.
Quality Creates The Future
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.02 Flexible Production Capacity:With an advanced production base of 8,700 square meters and rich technical experience, we are able to respond quickly to customer needs, whether it is small batch customization or large-scale mass production.
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.03 Quality Assurance:We strictly follow the GB/T 19001-2016/ISO9001:2015 quality management system. Each customized product undergoes strict quality inspection to ensure that it meets the high standards of customers.
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.04 Experienced Technical Team:Our internal technical team consists of experienced engineers and designers who can provide professional technical support to help you optimize product design and improve production efficiency.
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.05 Global Service Network:We have a stable supply chain and sales network around the world to ensure that your products can enter the market quickly and receive timely after-sales service.
About Two-Bolt Flange Customization
Two-bolt flanged bearings for specialized equipment require custom engineering. We provide end-to-end customization from flange geometry to material selection to final integration testing.
- 1Equipment Analysis: Review your existing equipment blueprints and mounting specifications to determine optimal flange geometry and bolt hole positioning.
- 2Material Selection: Confirm bearing material (GCr15 standard or stainless 304), sealing requirements, and temperature operating range for your application.
- 3Flange Design: Custom CAD models created showing modified flange bolt spacing, hole diameter, and mounting interface to match your equipment exactly.
- 4Prototype Testing: Initial flange samples manufactured and tested for runout, flatness, and dimensional accuracy before committing to full production.
- 5Production Tooling: Special CNC fixtures and grinding templates developed for your custom flange geometry, with setup time included in lead time.
- 6Manufacturing Run: Full production initiated with real-time SPC (Statistical Process Control) monitoring and intermediate dimensional inspections.
- 7Final Validation Testing: All custom flanges undergo enhanced testing protocols including runout verification, flange flatness confirmation, and bearing function validation.
- 8Installation Support: Technical drawings, torque specifications, and installation video provided; remote support available during first equipment integration.
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CONTACT Us
+86-13362474260 +86-0574-63322565
No. 98 Xinlang Road, Langxia Street, Yuyao City, Zhejiang Province, China
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Wholesale Two Bolt Flange Ball Bearings Manufacturers