Selecting the right rolling bearing depends on three critical factors: load type, rotational speed, and operating temperature. Mismatched bearings cause premature failure, downtime, and increased maintenance costs. This guide outlines how to match bearing specifications to your application’s exact conditions.
Load Capacity Requirements
Radial loads dominate most industrial applications; deep groove ball bearings (e.g., 6200 series) work best here. The 6205 model supports radial loads up to 20kN at 10,000 RPM, suitable for conveyor systems and small motors. For combined radial and axial heavy loads, choose tapered roller bearings (30200 series). The 30205 handles radial loads up to 35kN and axial loads up to 15kN, ideal for construction equipment and automotive axles. Never exceed a bearing’s rated load—overloading by 20% reduces lifespan by 50%.
Speed Limits and Lubrication
High-speed applications (over 10,000 RPM) require angular contact ball bearings. These minimize friction and heat generation, with 7205 models supporting speeds up to 15,000 RPM. Lubrication choice directly impacts speed performance: use synthetic grease for high-speed setups, as lithium-based grease thickens at high RPM, increasing friction. MS Bearings recommends synthetic lubricants for applications running above 8,000 RPM to prevent overheating and extend bearing life.
Temperature Resistance
Standard bearings fail at temperatures above 120°C. For extreme heat, use temperature-resistant bearings. The 6205-HT series operates reliably at temperatures up to 180°C, with heat-treated steel rings to avoid dimensional distortion. Cold environments (below -40°C) need low-temperature lubricants to prevent grease thickening. Always check the bearing’s temperature rating before installation—ignoring this leads to brittleness and cracking in cold conditions.
For project-specific requirements, consult your bearing supplier. Contact MS Bearings for free technical support.
Which bearing type handles both radial and axial loads?
Tapered roller bearings handle combined radial and axial loads up to 100kN at 500 RPM, making them ideal for automotive and heavy machinery applications.
