SKF
Needle Roller Bearing Components
SKF provides individual needle roller bearing components — inner rings, outer rings, needle rollers, and cages — allowing customized bearing arrangements or replacement in existing assemblies. Inner rings (IR series) are precision ground and hardened to serve as raceways on shafts that cannot be hardened; they can be mounted with adhesive or press fit. Outer rings in machined or drawn cup form are available when the housing surface needs a raceway. Loose needle rollers of ground, crowned, and end-profiled variants suit full complement arrangements. Cages (K series) for specific roller diameters and lengths enable in-house bearing construction. This component approach supports MRO of legacy equipment, small batch machine builds, and prototype development without the need for custom-made complete bearings.
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Trusted by Industry Leaders
Build-to-Spec Flexibility
Assemble custom bearings by combining components as needed.
Cost-Effective MRO
Replace only the damaged component (e.g., worn inner ring) without discarding the whole assembly.
Precision Ground and Hardened
Inner rings ensure quality raceway surface on non-hardened shafts.
Interchangeable Parts
Standard dimensions across SKF catalog for reliable replacement.
Crowned Needle Options
Provide optimal stress distribution in full complement arrangements.
Prototyping Efficiency
Quick delivery of components accelerates new machine development.
How to Order Inner Rings and Cages for Needle Bearings
Specify bore diameter, outer diameter, and width for inner rings (e.g., IR 20x25x20). For cages, specify roller diameter, roller length, and pitch diametric dimension. SKF’s product tables provide complete ordering references, ensuring correct fit with shaft and housing.
Customized Bearing Solutions Using Standard Components
Engineers with unusual spatial constraints can combine a drawn cup outer ring with an SKF cage and an inner ring to create a tailored bearing that meets exact load and envelope requirements, all from catalog items, eliminating tooling costs.