/ Single row angular contact ball bearings

7211 bearing

1.Product Introduction: The standard model of angular contact ball bearings (7211), with an inner diameter of 55mm and a contact angle of 25°, focusing on bearing axial loads, suitable for small and medium-sized precision equipment.
2.Structure Type: Inner ring + outer ring (with positioning groove for convenient installation) + single-row steel balls + stamped steel cage (conventional) / brass cage (customized).
3.Size Range: Inner diameter: 55mm, outer diameter: 100mm, width: 21mm.
4.Material: Inner ring / outer ring: GCr15, rolling elements (steel balls): GCr15, cage: stamped steel (conventional) / brass (precision customized).
5.Accuracy: Conventional P0 grade, precision models are of P6/P5/P4 grades.
6.Application Fields: Spindles of small machine tools, transmissions of light-duty truck automobiles, 5.5kW water pumps, generators, textile equipment.
7.Key Inspection Items: Outer diameter dimension accuracy (100 ± 0.008mm), contact angle (25° ± 1°), axial clearance (0.004 - 0.009mm), strength of the cage.
Product Description
DATA SHEET

7211 Bearing: Precision Engineered for Heavy-Duty Industrial Applications (P4 Grade, 150°C Heat-Resistant)

7211 bearing optimized for metallurgical, port, and medical equipment with ISO-certified manufacturing and 30% faster customization.

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Core Advantages

  • High-Temperature Resistance: Stable performance up to 150°C for metallurgical kilns and steel mills.
  • Ultra-Low Noise: Operates below 35dB, ideal for medical imaging devices.
  • P4 Precision Grinding: Radial runout ≤0.0025mm ensures reliability in high-speed port machinery.
  • Customizable Dimensions: Tailored inner/outer diameters and widths to fit non-standard specs.

Technical Specifications

  • Dimensions: 55mm (ID) x 100mm (OD) x 21mm (Width)
  • Load Capacity: Dynamic 61.8kN | Static 48.5kN
  • Material: High-purity chromium steel with HRC 60-64 surface hardness
  • Precision: ABEC-7/P4 (ISO 492)
  • Sealing: Triple-lip contact seals for IP6X dust/water resistance

Industry Applications

Metallurgy

7211 bearing withstands 150°C furnace rollers, offering a 20% longer lifespan than standard bearings.

Port Cranes

30% higher shock load capacity for grab ship unloaders in dusty or saltwater environments.

Medical Scanners

FDA-compliant materials with <35dB noise for MRI systems and precision medical robotics.

Quality Assurance

  • 3-Stage Inspection: Raw material spectrometry, in-process tolerance checks (±0.001mm), and final load/noise testing.
  • 12+ Performance Tests: Vibration analysis, salt spray resistance, and lifespan simulation.
  • Traceability: Digital certificates with batch-specific data for full transparency.

Global Logistics & Lead Times

  • Standard Orders: Shipped within 48 hours from US/EU/Asia warehouses.
  • Customized Solutions: Delivered in 15-20 days (e.g., non-standard φ3000mm+ variants).
  • MOQ: 50 units (sample orders accepted for testing).

Technical Support

  • Free Tools: Bearing load calculation services and 3D CAD models.
  • 24/7 Guidance: Remote installation support via video or AR tools.
  • Predictive Maintenance: IoT-enabled monitoring for OEMs to minimize downtime.

Why Choose Us?

  • 30+ Years Expertise: Specialized in industrial bearing R&D and production.
  • Integrated Supply Chain: 85% of components are self-manufactured for quality control.
  • Proven Reliability: 99.9% on-time delivery rate for bulk orders (1,000+ units).product-1-1

FAQ

Q: Can your products handle continuous 150°C operations?

A: Yes. Our HT Series uses ceramic coatings and ZR19 alloy for thermal stability.

Q: How do you customize bearings for high-speed port machinery?

A: We modify cage designs, use hybrid ceramic balls, and enhance sealing for wear resistance.

Q: What tests ensure P4 precision for medical use?

A: Each batch undergoes vibration analysis, noise testing, and ISO 14644-1 cleanliness checks.

Q: Do you offer certifications like ASTM or CE?

A: Yes. We provide pre-certified batches for urgent orders and region-specific compliance support.

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Contact Us

Need a tailored solution? Contact our engineers for a 7211 bearing at​​​​​​​ sales@inno-bearing.com for a free consultation.

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