A backing bearing (or backup bearing) is a specialized support bearing designed to protect machinery from excessive radial or axial loads during abnormal operating conditions. Commonly used in tandem with magnetic bearings, turbines, or high-speed spindles, these bearings act as a fail-safe mechanism when primary systems fail.
How Backing Bearings Work
When primary bearings (e.g., magnetic or fluid-film bearings) malfunction due to power loss or overload, backing bearings:
- Engage automatically to prevent rotor/stator contact
- Absorb sudden loads (up to 200% of normal capacity)
- Limit vibration during emergency stops
Key Applications
- Turbomachinery: Gas turbines, compressors
- Power Generation: Hydroelectric dams, wind turbines
- Industrial Pumps: High-speed centrifugal pumps
- Magnetic Bearing Systems: Emergency backup
Types of Backing Bearings
| Type | Features | Example Models |
|---|---|---|
| Rolling Element | Ball/roller design, low maintenance | SKF BB-500 Series |
| Plain/Sleeve | Oil-impregnated, high heat resistance | Waukesha 88T |
| Hybrid | Ceramic rollers + steel races | NSK Hybrid BB-U100 |
Why Choose Our Backing Bearings?
- Premium Material ScienceForged from aircraft-grade carburized steel (G20Cr2Ni4A) with proprietary heat treatment, delivering 3× longer wear life than standard bearings.
- Precision ManufacturingMachined to P4-grade precision (ISO P4/ABEC 9) using Swiss-made CNC grinders for ≤0.002mm runout tolerance.
- Military-Grade Testing100% tested for hardness (HRC 60-64), dynamic load capacity (200% overload), and vibration (<2.5mm/s) with traceable inspection reports.
- Certified QualityISO 9001 production with full material traceability (3.1 MTC).
- Direct Factory AdvantageOEM-ready designs with 30% cost savings versus branded alternatives.
Browse 100+ Backing Bearing Models
All products ship with 12-month warranty and technical support.