51256M Bearing Technical Specifications
- Dimensions
-
- Bore Diameter(d) 280 mm
- Outer Diameter (D) 380 mm
- Width(B) mm
- Basic Load Rating
-
- Dynamic Load Rating (Cr) 488 kN
- Static Load Rating (Cor) 2320 kN
-
- Weight 26.5 kg
- Bearing Model
- 51256M
- Bearing Type
- Single Direction Thrust Ball Bearings
- Main Dimensions
- 280mm × 380mm × mm
| ID | 280 mm | Inside diameter(I.D.) |
|---|---|---|
| OD | 380 mm | Outside diameter(O.D.) |
| H | 80 mm | Height/Thickness |
| Cr | 488 kN | Radial dynamic load rating |
| Cor | 2320 kN | Radial static load rating |
| Pu | 47.5 kN | Fatigue load limit |
| Reference speed | 750 r/min | |
| Limiting speed | 1000 r/min | |
| Mass | 26.5 Kg | Weight |
- Brand
- WJY / OEM Available
- Origin
- Wafangdian, China (Global bearing manufacturing hub with 30+ years expertise)
- 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
- Quality Standard
- ISO 9001:2015 Certified
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.
Delivery Time
- 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, extendable to 18 months via authorized JinYu distributors.
Pricing Information
Bearing prices vary by precision grade, raw material quality, and market dynamics. For customized quotes, please submit an inquiry via our contact form.