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 17X22X16
17.0 mm
22.0 mm
16.0 mm
0.0187 kg
IR 20X25X20
20.0 mm
25.0 mm
20.0 mm
0.028 kg
LR 15X18X12.5
15.0 mm
18.0 mm
12.5 mm
0.007 kg
IR 10X14X13
10.0 mm
14.0 mm
13.0 mm
0.0081 kg
IR 10X14X20
10.0 mm
14.0 mm
20.0 mm
0.011 kg
IR 12X15X16
12.0 mm
15.0 mm
16.0 mm
0.008 kg
IR 12X15X22.5
12.0 mm
15.0 mm
22.5 mm
0.011 kg
IR 12X16X16
12.0 mm
16.0 mm
16.0 mm
0.011 kg
IR 65X75X28
65.0 mm
75.0 mm
28.0 mm
0.23 kg
IR 130X150X50
130.0 mm
150.0 mm
50.0 mm
1.69 kg
IR 6X9X16
6.0 mm
9.0 mm
16.0 mm
0.004 kg
IR 15X18X16.5
15.0 mm
18.0 mm
16.5 mm
0.01 kg
IR 70X80X25
70.0 mm
80.0 mm
25.0 mm
0.224 kg
IR 15X20X13
15.0 mm
20.0 mm
13.0 mm
0.014 kg
IR 70X80X30
70.0 mm
80.0 mm
30.0 mm
0.267 kg
IR 170X185X45
170.0 mm
185.0 mm
45.0 mm
1.45 kg
IR 75X85X25
75.0 mm
85.0 mm
25.0 mm
0.238 kg
IR 75X85X30
75.0 mm
85.0 mm
30.0 mm
0.287 kg
IR 75X85X35
75.0 mm
85.0 mm
35.0 mm
0.336 kg
IR 80X90X35
80.0 mm
90.0 mm
35.0 mm
0.355 kg