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Yuyao, Ningbo City, China
SMALL AND MINIATURE BALL BEARINGS
Miniature and extra-small ball bearings can be sealed by shields to prevent leakage of lubricating grease or entry of dust.
The most popular sizes of miniature and small bearings are also produced in sealed versions. These bearings with Z and ZZ are greased using high quality grease, lubricated for life and suitable for high speeds.
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| Subject | Symbol | Description |
| Seal type | ZZ | Metal shields on both sides. |
| Z | Metal shield on one side. | |
| Tolerances | P0 | Normal tolerance level. Is not indicated as a standard. |
| P6 | Greater tolerance level than P0. | |
| P5 | Greater tolerance level than P6. |
Features
Miniature and small bearings are used for extremely high speeds. These bearings offer a low level of noise, vibration, and frictional torque performance.
Miniature and extra-small ball bearings can be sealed by shields to prevent leakage of lubricating grease or entry of dust. Since the appropriate quantity of a high quality lubricating grease is factory sealed, the sealed miniature and extra-small ball bearings allows simplification of sealing devices around the bearing and facilitates easy handling.
Sealing and lubrication
The most popular sizes of miniature and small bearings are also produced in sealed versions. These bearings with Z and ZZ are greased using high quality grease, lubricated for life and suitable for high speeds.
Cage
In general, a ribbon or crown type cage made of steel is used in miniature and small ball bearings.The ribbon type cage is used in relatively large bearing, while the crown type is used in smaller ones.
Help Center
Have a query? Please check this question and answers
We offer a wide range including loose type shields, crimped edge shields, right-angle edge shields, and fully customized bearing shields based on client drawings or samples.
Yes. We specialize in custom stamping solutions and can develop tooling based on your drawings, specifications, or samples. OEM and ODM are both welcome.
Our shields are typically made from galvanized steel, stainless steel (201/304), or cold-rolled steel. We can also recommend materials based on your application needs.
Yes. We offer samples for evaluation, and custom samples can also be produced within a short lead time.
Tooling development usually takes 15–30 days, depending on the complexity of the design. Sample delivery follows immediately after.
Yes. We are IATF16949,ISO 9001 certified and can provide RoHS, SGS, material test reports, and other compliance documentation upon request.
We currently export to Europe, North America, Southeast Asia, and the Middle East, with long-term clients in Germany, Brazil, the U.S., and more.
Lead time is usually 7–15 days after order confirmation, depending on quantity and whether new tooling is required.
