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

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Designation Bore diameter Outside diameter Width Mass
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 55X63X45
55.0 mm
63.0 mm
45.0 mm
0.256 kg
IR 60X68X45
60.0 mm
68.0 mm
45.0 mm
0.278 kg
IR 80X90X30
80.0 mm
90.0 mm
30.0 mm
0.304 kg
IR 80X90X54
80.0 mm
90.0 mm
54.0 mm
0.55 kg
IR 30X35X13
30.0 mm
35.0 mm
13.0 mm
0.025 kg
IR 85X100X35
85.0 mm
100.0 mm
35.0 mm
0.58 kg
IR 30X35X17
30.0 mm
35.0 mm
17.0 mm
0.032 kg
IR 85X100X63
85.0 mm
100.0 mm
63.0 mm
1.05 kg
IR 30X35X26
30.0 mm
35.0 mm
26.0 mm
0.05 kg
IR 90X105X35
90.0 mm
105.0 mm
35.0 mm
0.61 kg
IR 30X38X20 IS1
30.0 mm
38.0 mm
20.0 mm
0.065 kg
LR 45X50X20.5
45.0 mm
50.0 mm
20.5 mm
0.059 kg
IR 32X40X20
32.0 mm
40.0 mm
20.0 mm
0.068 kg
IR 35X43X22
35.0 mm
43.0 mm
22.0 mm
0.09 kg
IR 40X45X17
40.0 mm
45.0 mm
17.0 mm
0.043 kg
IR 40X45X20.5
40.0 mm
45.0 mm
20.5 mm
0.053 kg
IR 42X47X20
42.0 mm
47.0 mm
20.0 mm
0.0505 kg
IR 42X47X30
42.0 mm
47.0 mm
30.0 mm
0.081 kg