Wrapped Bronze Bushings (CuSn8)
High-strength phosphor bronze bushings rolled from CuSn8 strip with diamond oil pockets. FB090 equivalent, DIN 1494 compliant. Ideal for hydraulic cylinders, agricultural machinery, and heavy equipment.
What Are Wrapped Bronze Bushings?
Wrapped bronze bushings are thin-walled plain bearings manufactured from cold-rolled phosphor bronze strip (CuSn8). Unlike cast or machined solid bronze, these bushings are produced by rolling flat strip material into cylindrical or flanged forms, resulting in a characteristic longitudinal split joint.
The homogeneous bronze construction means the entire bushing is the same high-quality CuSn8 material throughout — no steel backing, no coatings. This provides excellent corrosion resistance, high thermal conductivity, and consistent wear properties across the full wall thickness.
JBM wrapped bronze bushings feature diamond-shaped oil pockets rolled into the bearing surface. These indentations act as grease reservoirs, ensuring rapid lubricant film formation at startup and extended lubrication intervals during operation.
CuSn8 Phosphor Bronze
High-strength tin bronze alloy with exceptional elasticity, wear resistance, and corrosion resistance.
Technical Data
| Material | CuSn8 (Phosphor Bronze) |
| Standard | DIN 1494 / ISO 3547 |
| Max Static Load | 120 N/mm² |
| Max Dynamic Load | 40 N/mm² |
| Max Speed (Greased) | 2.0 m/s |
| PV Limit | 2.8 N/mm²·m/s |
| Temperature Range | -100°C to +200°C |
| Wall Thickness | 1.0 - 2.5mm |
| Friction (Greased) | 0.04 - 0.20 |
Industry Equivalents
FB090 • WB-800 • BMZ • AB090 • SKF PRM
Direct replacement for all major OEM specifications
Oil Pocket & Surface Options
The bearing surface can be customized with different lubrication features to match your application requirements. Each pattern is optimized for specific operating conditions.
Diamond Oil Pockets
Diamond-shaped indentations rolled into the surface act as grease reservoirs. The standard pattern for most wrapped bronze applications.
Through Holes
Full-through perforations provide maximum oil capacity and allow debris to escape. Excellent for dirty environments with oil bath lubrication.
Graphite Filled Pockets
Diamond pockets filled with solid graphite lubricant. Provides emergency dry-running capability and reduced startup friction.
Plain / Smooth Surface
No surface features. Used in strict hydrodynamic lubrication applications where a continuous oil film is maintained.
Wrapped Bronze vs. Cast Bronze
Wrapped Bronze (FB090)
- Manufacturing: Rolled from strip material
- Wall Thickness: Thin (1.0 - 2.5mm)
- Joint: Has a longitudinal split
- Cost: Lower for high volume
- Best For: Compact designs, standard sizes
Cast Bronze (Solid)
- Manufacturing: Machined from bar/tube
- Wall Thickness: Thick (3mm+)
- Joint: Seamless
- Cost: Higher, custom machining
- Best For: Heavy duty, custom shapes
When to choose Wrapped Bronze: Select wrapped bronze bushings when you need thin-wall design for space constraints, high-volume cost efficiency, or standard DIN 1494 / ISO 3547 sizes. The split joint does not affect performance in properly designed housings.
Why Choose JBM Wrapped Bronze Bushings
High Load Capacity
CuSn8 phosphor bronze handles static loads up to 120 N/mm². Ideal for slow-speed, high-load oscillating movements.
Thin Wall Design
Compact wall thickness (1.0-2.5mm) minimizes overall assembly dimensions. Space-saving solution for tight installations.
Corrosion Resistant
Homogeneous CuSn8 bronze resists corrosion from water, chemicals, and weathering. Suitable for outdoor and marine environments.
Thermal Conductivity
Superior heat dissipation prevents hot spots and thermal damage. Wide temperature range: -100°C to +200°C.
Oil Pocket Design
Diamond indentations store grease for extended lubrication intervals. Ensures rapid film formation at startup.
Machinable ID
Inner diameter can be machined after installation for precision fitting. Allows fine-tuning of clearance in-situ.
DIN 1494 Standard
Manufactured to international standards. Direct drop-in replacement for FB090, WB-800, and equivalent series.
Cost Effective
Roll-forming process is more economical than machining solid bronze. Excellent value for high-volume production.
We typically respond to inquiries within 12 hours. Get expert recommendations for your application.
Get a QuoteWhere Wrapped Bronze Bushings Excel
Wrapped bronze bushings are the preferred choice for high-load, slow-speed applications where corrosion resistance and grease lubrication are required.
Hydraulic Equipment
- Hydraulic cylinder eyes
- Cylinder clevis mounts
- Actuator pivot points
- Pump linkages
- Valve actuators
- Mobile hydraulic systems
Agricultural Machinery
- Tractor linkage bushings
- Harvester pivot bearings
- Implement attachment points
- PTO shaft bushings
- Loader arm pivots
- Disc harrow bearings
Lifting Equipment
- Crane boom bushings
- Tail lift pivots
- Scissor lift bearings
- Forklift mast bushings
- Hoist drum bearings
- Aerial platform pivots
Construction Equipment
- Excavator bucket pins
- Dozer blade pivots
- Backhoe linkages
- Concrete pump arms
- Road roller bearings
- Compactor pivot points
Bushing Types & Dimensions
Cylindrical Bushings
Standard sleeve design for radial loads. Most common configuration.
ID: 6mm - 150mm
Flanged Bushings
Integral flange for axial location and thrust loads.
ID: 8mm - 100mm
Thrust Washers
Flat ring bearings for pure axial loads.
ID: 10mm - 80mm
Need Wrapped Bronze Bushings?
JBM manufactures CuSn8 wrapped bronze bushings to DIN 1494 and ISO 3547 standards. From hydraulic cylinders to agricultural equipment, we deliver FB090-equivalent quality at competitive prices.
Request a Quote