For agricultural equipment distributors and OEM buyers, an order should account for dust, moisture, intermittent operation and storage between seasons. Mainland supplies common ball and roller bearing models for sourcing review. Compare the original bearing and surrounding housing before choosing a closure or protective arrangement for field service.
An open bearing relies on the machine's housing, seals and lubrication system for protection. A sealed bearing also needs an application review where washdown, abrasive dust or damaged housing seals can allow contamination to enter.
Check bore shape, outside diameter, width and locking method. Standard round-bore catalog models are not direct replacements for hex-bore, square-bore, insert bearings or complete agricultural hub assemblies.
Include trial quantity, annual forecast and required delivery batches in the RFQ. Agree rust protection, individual packing and storage requirements, especially where spare parts may remain unused between operating seasons.
These are reference models, not approved selections for a specific machine. Final suitability, suffix and performance data require technical confirmation.
| Model | Bearing type | Bore d (mm) | Outside D (mm) | Width B/T (mm) | Details |
|---|---|---|---|---|---|
| 6205 | Deep Groove Ball Bearing | 25 | 52 | 15 | View specifications → |
| 6206 | Deep Groove Ball Bearing | 30 | 62 | 16 | View specifications → |
| 30206 | Tapered Roller Bearing | 30 | 62 | 17.25 | View specifications → |
| 22208 | Spherical Roller Bearing | 40 | 80 | 23 | View specifications → |
The catalog covers selected standard metric models. For insert bearings, special bores or hub assemblies, send the drawing and markings so availability can be reviewed.
No. Seal selection must account for the environment and the surrounding assembly. Confirm the permitted cleaning method with the equipment manufacturer.
Further technical reading: NTN bearing selection principles. Third-party guidance explains selection principles; it does not establish Mainland product ratings or endorsements.