Resources
Bearing guides & knowledge
Selection, interchange, installation and maintenance know-how for B2B buyers — updated regularly.
ZZ vs 2RS vs Open Bearings: A Bearing Seal Selection Guide
Match ZZ shields, 2RS rubber seals or open bearings to temperature, contamination, speed and maintenance access, with field cases from steel mills, wind gearboxes and crushers.
Read guide →Bearing Seals and Shields Compared: ZZ vs 2RS vs Open Types
A side-by-side comparison of ZZ shields, 2RS seals and open bearings on construction, IP rating, temperature, speed and life, plus a selection method and three field cases.
Read guide →How to Buy Genuine Branded Bearings from China: A B2B Sourcing Guide
Verify branded bearings before you buy: batch codes, laser marking, material records and supplier qualification, plus a staged sourcing process that keeps counterfeits out.
Read guide →How to Choose Bearing Clearance C2, C3, C4: Selection Guide
Pick C2, C3 or C4 internal clearance from the operating envelope rather than habit: thermal growth, fit squeeze and load zone, with worked examples from spindles, crushers and steel mills.
Read guide →How to Choose Bearing Clearance C2, C3, C4 for Industrial Machinery
A working guide to internal clearance selection: thermal loss, load classification and fit tolerance, with C2/C3/C4 applications and documented cases from steel, wind, CNC and mining duty.
Read guide →How to Request and Evaluate Bearing Samples from China Suppliers
A sample protocol that prevents batch failures: request criteria, material and clearance verification, red flags, and lot traceability that ties approval to the container.
Read guide →How to Source OEM/ODM Bearings from Chinese Factories: Buyer's Guide
Qualify Chinese OEM/ODM bearing suppliers on traceability, engineering depth and production control, with audit criteria, stage timelines and cases from wind energy and mining.
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