Inner rings

SKF Inner Rings are precision-engineered core components of rolling bearings, designed to work in tandem with rolling elements (balls, rollers) and outer rings to enable smooth rotational motion under load. These critical components transfer radial and axial forces from rotating shafts to stationary housings while maintaining alignment and minimizing friction. Manufactured to exacting tolerances using advanced metallurgy, SKF inner rings ensure optimal bearing performance, longevity, and reliability across industries ranging from automotive and aerospace to heavy machinery and renewable energy systems.

Applications & Industry Use Cases

SKF Inner Rings are integral to rotating systems requiring precision and durability:

  1. Automotive Systems

Wheel Hub Units: High-precision inner rings for tapered roller bearings in passenger/EV vehicles.

Transmission Gearboxes: Carburized steel rings for high-cycle fatigue resistance.

  1. Industrial Machinery

Electric Motor Bearings: Low-noise designs for high-speed spindles.

Steel Rolling Mills: Extra-heavy-duty rings for 4-row cylindrical roller bearings.

  1. Aerospace & Defense

Jet Engine Shafts: Ceramic hybrid rings for high-temperature turbine applications.

Helicopter Rotor Systems: Corrosion-resistant stainless variants for marine operations.

  1. Renewable Energy

Wind Turbine Gearboxes: Large-diameter rings (500+ mm) for multi-MW generators.

Hydroelectric Generators: Water-resistant coatings for humid environments.

  1. Robotics & Automation

Precision Linear Guides: Miniature rings for high-accuracy motion systems.

Food Processing: FDA-compliant stainless steel rings for hygienic environments.

SKF Inner Rings represent the pinnacle of bearing component engineering, delivering unmatched precision, durability, and adaptability. From high-speed EV motors to gigawatt-scale wind turbines, these critical components ensure reliable power transmission while reducing maintenance costs and downtime. Backed by SKF’s global technical network and century-long expertise, they provide a future-proof solution for industries demanding peak performance in extreme operating conditions. Whether as standalone replacements or integrated into complete bearing assemblies, SKF Inner Rings exemplify engineering excellence and sustainable innovation

MORE +
CLOSE +
Designation Bore diameter Outside diameter Width Mass
IR 100X110X30
100.0 mm
110.0 mm
30.0 mm
0.375 kg
IR 100X110X40
100.0 mm
110.0 mm
40.0 mm
0.505 kg
IR 140X160X50
140.0 mm
160.0 mm
50.0 mm
1.77 kg
IR 45X52X40
45.0 mm
52.0 mm
40.0 mm
0.167 kg
IR 14X17X17
14.0 mm
17.0 mm
17.0 mm
0.0094 kg
IR 45X55X22
45.0 mm
55.0 mm
22.0 mm
0.13 kg
IR 150X165X40
150.0 mm
165.0 mm
40.0 mm
1.12 kg
IR 17X20X30.5
17.0 mm
20.0 mm
30.5 mm
0.021 kg
IR 17X22X23
17.0 mm
22.0 mm
23.0 mm
0.027 kg
IR 180X195X45
180.0 mm
195.0 mm
45.0 mm
1.51 kg
IR 20X24X16
20.0 mm
24.0 mm
16.0 mm
0.0174 kg
IR 20X24X20
20.0 mm
24.0 mm
20.0 mm
0.021 kg
IR 20X25X30
20.0 mm
25.0 mm
30.0 mm
0.0404 kg
IR 220X240X50
220.0 mm
240.0 mm
50.0 mm
2.75 kg
IR 240X265X60
240.0 mm
265.0 mm
60.0 mm
4.6 kg
IR 25X30X20.5
25.0 mm
30.0 mm
20.5 mm
0.034 kg
IR 28X32X17
28.0 mm
32.0 mm
17.0 mm
0.025 kg
IR 32X40X36
32.0 mm
40.0 mm
36.0 mm
0.124 kg
IR 100X115X40
100.0 mm
115.0 mm
40.0 mm
0.797 kg
IR 40X45X20
40.0 mm
45.0 mm
20.0 mm
0.05 kg