Technical library
Practical references for dimensions, seals, materials, noise, clearance and high-speed miniature bearing selection.
42 models with dimensions, precision, clearance, closure and other published technical data. Updated October 2026.
Download CSVCompare 33 main products, one additional miniature model and eight double-row configurations.
Browse modelsTechnical articles
How bore, outside diameter and width define a miniature bearing—and what to confirm before requesting a quote.
A practical comparison of metal shields and rubber seals for miniature bearing applications.
Key factors for controlling bearing noise, vibration and service life in compact electric motors.
Why bearing noise should be specified together with speed, fit, lubrication and the finished assembly.
How to compare chrome bearing steel with stainless options for miniature bearing projects.
A concise guide to internal clearance and the effect of fit, heat and operating speed.
How bearing OD, flange OD and housing geometry work together in compact flanged-bearing installations.
FAQ
Dongsheng specializes in miniature ball bearings with a 1–15 mm bore range.
Yes. Send a drawing or sample with the application, volume and performance requirements for feasibility review.
The miniature catalog uses ZZ metal shields with an RS option on selected series. Published double-row models include shielded, sealed and 2RS configurations. Confirm the final configuration and part designation with your quote.
The current catalog includes P0, P5 and P6 models. Noise requirements, fits, loads, material and lubrication should be confirmed for the intended application.
Engineering support
Send the model, size and operating conditions you know. Engineering can identify the remaining specification questions.