51248M Thrust Ball Bearing
Technical Specifications
| d | 240 mm | Inside Diameter(I.D.) |
|---|---|---|
| D | 340 mm | Outer Diameter(O.D.) |
| H | 78 mm | Height/Thickness |
| Cr | 449 kN | Dynamic Load Rating |
| Cor | 1960 kN | Static Load Rating |
| Pu | 42.5 kN | Axial Static Radial Load Rating |
| reference | 800 r/min | Reference Speed |
| limit | 1100 r/min | Limiting Speed |
| Mass | 23 Kg | Weight |
Main Dimensions
240mm × 340mm × mm
Bearing Type
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
Quality Standard
Product Description
The 51 series single direction thrust ball bearing (model: 51248M) 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 240mm, outer diameter of 340mm, and height of 78mm, providing dynamic load capacity of 449kN and static load capacity of 1960kN. 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.
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FAQ
Our bearings come with a 12-month warranty from the date of delivery. This warranty covers any manufacturing defects under normal operating conditions. For specific applications with extreme conditions, we can provide extended warranty options upon request.
For standard models that are in stock, we can ship within 3-5 working days after receiving payment. For standard models not in stock, lead time is typically 2-3 weeks.
For customized spherical roller bearings, lead time depends on the complexity of customization and quantity, usually ranging from 4-8 weeks. We can provide a more accurate timeline after evaluating your specific requirements.
We accept various payment terms including:
- T/T (Telegraphic Transfer): 30% deposit, 70% before shipment
- L/C (Letter of Credit): Irrevocable L/C at sight
- Western Union for small orders
- Negotiable terms for long-term customers
Yes, we provide comprehensive technical support including:
- Installation guidelines and recommendations
- Lubrication selection advice
- Maintenance schedules and procedures
- Online technical consultation via email and WhatsApp
- On-site technical support can be arranged for large projects (additional fees may apply)
Yes, we specialize in producing non-standard and customized spherical roller bearings. We can manufacture according to your drawings, samples, or specific technical requirements. Our engineering team will evaluate your requirements and provide a detailed quotation including design confirmation, material selection, and production timeline.
We offer flexible shipping options to meet your needs:
- Ocean Freight: Most economical for large orders and full container loads
- Land Transport: Suitable for regional deliveries and smaller shipments
Delivery Time:
- Standard bearings: 3-5 days for in-stock items
- Custom/OEM orders: 20-35 days for production and delivery
- Exact timing depends on order quantity, customization, and destination
Contact our sales team for specific shipping quotes and delivery estimates based on your location and requirements.
Our bearing pricing is influenced by several key factors:
- Precision Grade: P0 (Standard), P6, P5, or P4 precision levels
- Raw Materials: GCr15, GCr15SiMn, GCr18Mo, or other specialty steels
- Market Factors: Raw material costs and market demand
- Order Quantity: Volume discounts available for larger orders
- Customization: Special features, coatings, or modifications
For accurate pricing, we provide customized quotes based on your specific requirements. Please submit an inquiry with your needed specifications, quantities, and any special requirements for a detailed quotation.