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Self Lubricating Spherical Plain Bearing, Graphite Embedded Bronze Bushing, Steel Outer Ring Joint Bearing for Engineering Machinery, Hydraulic

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Jiaxing Yishengrui Intelligent Technology Co., Ltd

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Self Lubricating Spherical Plain Bearing, Graphite Embedded Bronze Bushing, Steel Outer Ring Joint Bearing for Engineering Machinery, Hydraulic

Place of Origin : China

Outer Ring Material : 45# Carbon Steel, quenched & tempered

Certification : ISO9001

Product Name : Self-lubricating Spherical Plain Bearing / Graphite Bronze Spherical Joint Bearing

Payment Terms : L/C,D/A,D/P,T/T

Friction Coefficient : 0.08 ~ 0.15 (dry friction)

Application Areas : construction machinery, automation equipment, hydraulic machinery, metallurgical equipment, machine tools, automotive tooling, Injection mold, die casting mold,stamping die

Delivery Time : 5~8 work days

Maximum Dynamic Load : 60~120 N/mm² (depends on size)

Supply Ability : on demand

Maximum Static Load : 120~250 N/mm² (depends on size)

MOQ : 100 pieces

Inner Spherical Liner Material : High-strength Brass / Tin Bronze, embedded graphite solid lubricant

Packaging Details : on demand

Tolerance : Standard / On-demand

Price : $3~$30 piece

Working Temperature : -40℃ ~ +280℃

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Product Overview

This self-lubricating spherical plain bearing (spherical joint bearing) consists of a 45# steel outer ring and a high-strength bronze spherical inner liner embedded with solid graphite lubricants. The graphite solid lubricant is pre-embedded into the bronze ball surface, realizing maintenance-free operation. It can bear heavy radial loads and certain axial loads while accommodating angular misalignment and oscillating rotary motion. No additional grease or oil supply is required during service. Works reliably under high temperature, low speed, heavy load, dusty or water-washing working conditions, greatly reducing downtime and lubrication cost.

Key Features

✅ Oilless Self-lubrication: Graphite solid lubricant embedded, no frequent oil refilling.

✅ High Load Capacity: High tensile bronze inner ball, strong resistance to impact & heavy load.

✅ Good Misalignment Compensation: Spherical sliding surface absorbs angular deflection.

✅ Wide Temperature Range: Stable performance from low to high working temperature.

✅ Anti-wear & Anti-corrosion: Bronze matrix with excellent wear resistance.

✅ Customizable Sizes: Support OEM & non-standard drawing production.

Typical Application Fields

Construction & engineering machinery, excavator arm hinge points
Hydraulic cylinders, hydraulic equipment
Automation equipment, packaging & textile machinery
Injection mold, stamping die, machine tools
Water conservancy, metallurgy, mining equipment
Automotive new energy equipment

Technical Parameter Table

Item	Specification
Product Name	Self-lubricating Spherical Plain Bearing / Graphite Bronze Spherical Joint Bearing
Outer Ring Material	45# Carbon Steel, quenched & tempered
Inner Spherical Liner Material	High-strength Brass / Tin Bronze, embedded graphite solid lubricant
Motion Type	Oscillating movement, low-speed rotary movement
Working Temperature	-40℃ ~ +280℃
Friction Coefficient	0.08 ~ 0.15 (dry friction)
Maximum Static Load	120~250 N/mm² (depends on size)
Maximum Dynamic Load	60~120 N/mm² (depends on size)
Surface Finish	Ra0.8 polished spherical surface
Available Standard	JQB / JDBS series, custom drawings acceptable
Lubrication	Maintenance-free, solid graphite self-lubricating

Package & Delivery

Package: Anti-rust oil + plastic bag + carton / wooden case
Shipping: Sea / air / express delivery as customer request
MOQ: Small MOQ for sample order, bulk quantity for mass production

Our Advantages

We are a professional manufacturer of sliding bearings and spherical plain bearings. We own CNC machining workshop and quality inspection system. Strict dimension tolerance control, full inspection before shipment. We provide sample testing service and customized machining according to your drawings.

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