51256M
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- Bore Diameter(d) 280 mm
- Outer Diameter(D) 380 mm
- Width(B) mm
-
- Dynamic Load Rating(Cr) 488 kN
- Static Load Rating(Cor) 2320 kN
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- Weight 26.5 kg
- Main Dimensions
- 280mm × 380mm × mm
- Bearing Type
- Single Direction Thrust Ball Bearings
| d | 280 mm | Inside Diameter(I.D.) |
|---|---|---|
| D | 380 mm | Outer Diameter(O.D.) |
| H | 80 mm | Height/Thickness |
| Cr | 488 kN | Dynamic Load Rating |
| Cor | 2320 kN | Static Load Rating |
| Pu | 47.5 kN | Axial Static Radial Load Rating |
| reference | 750 r/min | Reference Speed |
| limit | 1000 r/min | Limiting Speed |
| Mass | 26.5 Kg | Weight |
The 51 series single direction thrust ball bearing (model: 51256M) is designed to handle axial loads in one direction. It features a one-piece solid brass cage and chrome steel (GCr15) construction with carbonitriding treatment for enhanced durability. The bearing has a bore diameter of 280mm, outer diameter of 380mm, and height of 80mm, providing dynamic load capacity of 488kN and static load capacity of 2320kN. This bearing is ideal for applications such as machine tool spindles, automotive transmissions, and industrial pumps, particularly suited for medium industrial equipment like gearboxes and agricultural machinery. Compliant with ISO 9001 standards, it supports grease lubrication (with oil lubrication option for high-speed applications) and operates within a temperature range of -30°C to +120°C. During installation, a recommended torque of 80-150 N·m is advised for washer bolts to ensure optimal performance. The manufacturer offers a Standard 12-month warranty extendable up to 18 months through authorized Jinyu distributors. OEM solutions available.
- Precision Rating
- P0 (Standard) / P6 / P5 / P4 (Higher precision for demanding applications)
- Cage
- Machined brass cage
- Material
-
- GCr15 Bearing Steel (Industry-standard for high load & fatigue resistance)
- GCr15SiMn
- GCr18Mo
- G20Cr2Ni4A
- Clearance
- C3 (standard), customizable to C0/C2/C4/C5
- Brand
- WJY / OEM Available
- Origin
- Wafangdian, China (Global bearing manufacturing hub with 30+ years expertise)
- Quality Standard
- ISO 9001:2015 Certified
- Delivery Time
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- For in-stock own-brand bearings, Dalian JinYu HuaYang guarantees shipment arrangement within 3–5 days after payment confirmation.
- For OEM/ODM orders, the production and delivery lead time for a full container typically ranges from 20–35 days (depending on order complexity).
- Shipping Methods
- Ocean Freight/Land Transport
- Warranty
- We provide 12-month warranty for all our products.
- Pricing Information
- Bearings prices vary based on precision grade, raw materials, and market factors. For customized quotes, please submit an inquiry.