Self-Aligning Ball Bearings
Self-aligning ball bearing 1204
Self-aligning ball bearing 1204, open type, boundary dimensions 20 mm × 47 mm × 14 mm. Specifications below are model-bound catalog values; send your application details through the RFQ for a confirmed quotation.
Last updated: 2026-10
Specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 20 mm |
| Outside diameter (D) | 47 mm |
| Width (B) | 14 mm |
| Basic dynamic load rating (Cr) | 12.4 kN |
| Basic static load rating (C0r) | 2.65 kN |
| Fatigue load limit (Cu) | 0.16 kN |
| Limiting speed, grease lubrication | 14000 min-1 |
| Limiting speed, oil lubrication | 17000 min-1 |
All values above are model-bound catalog values traceable to a collected source. Fields without collected evidence are not published; ask with your inquiry and we confirm them at quotation.
Applications and selection notes
Self-aligning ball bearings carry radial load with a limited axial component in both directions and tolerate angular misalignment between shaft and housing. The spherical outer raceway lets the inner ring and balls swivel, which is why this type is used on long shafts, fan rotors, textile and conveying machinery — anywhere deflection or mounting tolerances would overload a rigid deep groove bearing.
How to read the specification table
The specification table gives boundary dimensions, load ratings and limiting speeds as designation-bound catalog values. The misalignment the type can absorb depends on the execution and the surrounding clearances, so treat the spherical feature as a capacity to confirm at quotation when your application has known deflection. Where conditions are severe, the same shaft position may also be a candidate for spherical roller bearings — compare life across both types rather than defaulting.
Further reading
1204 — buying questions
What does the designation 1204 mean?
1204 is a standard boundary-dimension designation: the dimension series fixes the outside diameter and width proportions, and the bore code fixes the bore diameter — 20 mm for this bearing. Two bearings carrying the same designation from conforming manufacturers are dimensionally interchangeable; execution (seals, clearance class, cage) is the part that can differ, so state the execution you need when you request a quotation.
Are the catalog load rating and speed of 1204 enough for my application?
The table lists Cr = 12.4 kN and a catalog limiting speed of 14000 min-1. The load rating is the starting point of a life calculation, and the limiting speed is a catalog value for the manufacturer’s execution — seals, fits, temperature and lubrication all reduce the usable speed in a real assembly. Send the application conditions with your inquiry and we confirm suitability before quoting; do not size from the catalog speed alone.
What information do you need to quote 1204?
Four things, in one message: the designation (and execution — seals, clearance class, precision class, if not standard), the quantity, the destination country, and any documents you require. Application conditions such as speed, load direction and temperature are welcome and let us verify the execution instead of assuming it. Quotation, lead time and the exact document set come back in writing.
Ordering & documentation
Documents
Standard export documentation — commercial invoice, packing list and certificate of origin — accompanies every shipment. The exact document set for your order, and any material or inspection paperwork you require alongside it, is confirmed in writing at quotation before the order is placed.
Quotation
To quote 1204, send: the designation and required execution, quantity, destination country, and any required documents. Adding the application conditions (speed, load direction, temperature, fit) lets us confirm the execution and clearance class instead of quoting blind.
Sample & supply
Sample quantities of standard-designation bearings such as 1204 are available for evaluation before a bulk order. Bulk supply runs through own production plus a qualified outsourcing network, so catalog items are not capped by own-factory capacity; the confirmed lead time is stated in the quotation.
Current confirmed lead-time practice: 15-30 business days for bulk standard bearings; 5-10 for samples. Standard quality system: ISO 9001.
Storage & shipping
Bearings are packed moisture-protected for export and should be stored flat, in unopened original packaging, in a dry indoor area away from temperature swings. Do not unwrap or rotate bearings before mounting; rotate only by the ring being pressed, never through the rolling elements.