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 30X35X16
30.0 mm
35.0 mm
16.0 mm
0.031 kg
IR 95X110X35
95.0 mm
110.0 mm
35.0 mm
0.643 kg
IR 6X9X12
6.0 mm
9.0 mm
12.0 mm
0.003 kg
IR 7X10X12
7.0 mm
10.0 mm
12.0 mm
0.004 kg
IR 80X90X25
80.0 mm
90.0 mm
25.0 mm
0.254 kg
IR 90X100X30
90.0 mm
100.0 mm
30.0 mm
0.34 kg
LR 20X25X12.5
20.0 mm
25.0 mm
12.5 mm
0.016 kg
LR 25X30X12.5
25.0 mm
30.0 mm
12.5 mm
0.02 kg
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 10X13X12.5
10.0 mm
13.0 mm
12.5 mm
0.005 kg
IR 120X130X30
120.0 mm
130.0 mm
30.0 mm
0.462 kg
IR 50X60X25
50.0 mm
60.0 mm
25.0 mm
0.163 kg
IR 15X20X23
15.0 mm
20.0 mm
23.0 mm
0.024 kg
IR 50X60X28
50.0 mm
60.0 mm
28.0 mm
0.183 kg
IR 160X175X40
160.0 mm
175.0 mm
40.0 mm
1.2 kg
IR 55X60X25
55.0 mm
60.0 mm
25.0 mm
0.086 kg
IR 22X28X20.5
22.0 mm
28.0 mm
20.5 mm
0.036 kg
IR 55X65X28
55.0 mm
65.0 mm
28.0 mm
0.198 kg
IR 25X32X22
25.0 mm
32.0 mm
22.0 mm
0.052 kg