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Home> Angular Contact Ball Bearings> 7228AC Angular Ball Bearings Heavy Duty High Load Capacity Bearing
Product Details
Company Details
Product Specification
7228AC Angular Ball Bearings Heavy Duty High Load Capacity Bearing
Product Overview
7228AC Angular Contact Ball Bearing: Heavy-Duty, High-Precision Performance
Basic Parameters
Bore diameter (d): 140mmOuter diameter (D): 250mmWidth (B): 42mm (single bearing); total thickness 84mm when mounted in pairsContact angle: 25° (suffix "AC" indicates standard angular contact design)Weight: Approximately 12.5~13.2kg (single bearing)Structure: Single-row, non-separable design with inner/outer rings, paired with balls and cageCage options: Solid brass (for high-speed stability) or bakelite (cost-effective)
Core Performance Specifications
Load Capacity
Dynamic load rating (Cr): 228kN (typical value)Static load rating (C0r): 198kN (estimated based on size and load relationships)Material:
Standard: GCr15/SUJ2 high-carbon chromium bearing steel (surface hardness HRC58-62)
Optional: Stainless steel (SUS440C) or ceramic (Si3N4 balls + steel rings)
Speed & Precision
Limiting speed:
Grease-lubricated: 2,200rpm (standard type)
Oil-lubricated: 3,000rpm (optimized for heat dissipation)
Precision class: Standard P0; customizable to P4/P5
Technical Features
Axial-radial load capability: Single bearing supports radial loads and unidirectional axial thrustMounting configurations: DB (back-to-back), DF (face-to-face), DT (tandem) to enhance rigidityStability design: Optimized raceway curvature and cage structure reduce friction and temperature rise
Structural & Environmental Adaptability
Tolerance compatibility: Shaft: H7/k6, Housing: J7Temperature range:
Standard: -20°C to 120°C
High-temperature type: Up to 300°C (requires ceramic materials + high-temperature grease)
Sealing options:
Standard: Open (no seals)
Optional: 2RS (double rubber seals) or ZZ (double metal shields) with protection class IP54
Typical Applications
Industrial Machinery
Heavy-duty gearboxes in mining crushers and metallurgical rolling mills
Large-scale motors for main shafts of chemical pumps or compressors
Wind turbines pitch drive systems (1.5MW+ models)
Transportation
Marine propulsion systems in salt-spray environments
Railway traction systems for train motors
Precision Equipment
CNC machine tool spindles for heavy-duty cutting
Industrial robotics joint bearings for robotic arms
Maintenance & Lubrication Guidelines
Lubrication
Grease: Lithium-based grease (NLGI 2) with 15%-20% filling volumeOil: ISO VG 46-68 circulating oil for continuous high-speed operation
Re-lubrication Interval
Normal operating conditions: Every 8,000~12,000 hours
High-temperature/high-pollution environments: Shorten to 4,000 hours
Certifications & Compatibility
Standards compliance: ISO 9001:2015, ISO 281 load standardsCross-brand compatibility: Interchangeable with models such as NACHI 7228 and SKF 7228 ACDGA
Customization Options
Material Upgrades
Ceramic hybrid: Si3N4 ceramic balls + steel rings, with 15% higher dynamic load capacityStainless steel: SUS440C material with corrosion resistance >1,000 hours in salt spray tests
Special Configurations
Phosphating coating: Surface treatment reduces friction coefficientLaser-etched coding: High-precision marking supports IIoT equipment tracking
Summary
The 7228AC angular contact ball bearing features large dimensions, high load capacity (228kN dynamic), and multi-scenario adaptability as core advantages, making it widely used in wind power, heavy machinery, and precision machining fields. Its standardized design and customizable features balance performance and cost. With scientific lubrication and maintenance, it delivers reliable long-term operation in extreme environments ranging from -20°C to 300°C.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company,Seller,Other
Total Annual:
10000000-20000000
Ecer Certification：
Verified Supplier
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Reach Us
Dongguan Kesle Electronic Hardware Co., Ltd Guangdong Dongguan Kesile Electronic & Hardware Products Factory https://www.industrial-ballbearings.com/
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