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Application Sectors · Material Deep Dive · Selection Engine
The bearings, bronze pieces and self-lubricating bronze with solid inserts manufactured by VIIPLUS are engineered for heavy load, low speed, and boundary lubrication applications. With their low friction coefficient, excellent thermal transmission, and high corrosion resistance, they perform reliably in demanding environments where continuous external lubrication is difficult or impossible.
Found in excavators, gates, and lifting equipment. Withstands heavy loads and low-speed oscillation, requiring self-lubrication to prevent jamming.
Used in ship rudders, turbine guide vanes, and valve stems. Relies on bronze's friction-reducing and anti-corrosive properties under boundary lubrication.
Essential in steel mill continuous casters. Heat-resistant bronze handles impurities and ensures maintenance-free operation via embedded solid lubricants.
Crucial in wind turbine and mining gearboxes. Embedded solid lubricants solve oil-starvation issues caused by centrifugal force and high torque demands.
Self-lubricating bearings span four primary structural families: composite polymer bearings, solid-lubricant-embedded metallic bearings, bimetallic bearings, and specialty material bearings. Matrix options include metallic (copper alloy, steel/cast iron, aluminum), polymer (PTFE, POM, PA, PEEK), ceramic, and advanced composites.
| Sub-Type | Key Characteristics / Load | Typical Applications |
|---|---|---|
| Copper-Alloy Based (Embedded Graphite/MoS₂) |
High-strength brass/bronze. Temp: -100°C to +300°C. Load: Dynamic ~100 N/mm², Static ~500 MPa. Impact resistant, maintenance-free. |
Steel casters, rolling mill screw-down nuts, marine rudder bearings, turbine wicket gates, injection molding. |
| Cast Iron Based | Gray/ductile iron with graphite/MoS₂. Temp: -60°C to +400°C. Load: < 14.5 N/mm². High-temp stability, lower cost. |
Mold guide pillars, furnace rollers, rubber machinery, fireplace doors. |
| Steel Based | Bearing steel matrix. Extremely high structural strength & wear resistance. Avoid water/acidic environments. |
Heavy machinery, crane supports, excavator joints where relubrication is impossible. |
| Type | Key Specs | Typical Applications |
|---|---|---|
| PTFE-Based (Composite) Steel/Bronze Backing |
Temp: -195°C to +280°C. Load: 250 N/mm² max. True dry-running, low noise, corrosion resistant. |
Automotive steering, shock absorbers, gear pumps, aerospace actuators. |
| POM-Based Variant | Temp: -40°C to +90°C. Load: 140 MPa (low-speed). Grease pockets aid boundary lubrication. Good for frequent start-stop. |
Automotive chassis, general industrial linkages. |
| Wrapped Bronze (with pockets) |
Temp: -100°C to +200°C. Load: 120 N/mm² max. Lightweight, thin-walled, requires periodic grease. |
Textile machinery, hydraulic cylinder guides, agricultural machinery. |
| Material | Temp Range | Key Features | Applications |
|---|---|---|---|
| POM (Acetal) | -60°C to +100°C | Good stiffness, self-lubricating, dimensionally stable. Limited heavy load. | Home appliances, printer mechanisms. |
| PA (Nylon) | -40°C to +100°C | Tough, impact absorbing, low noise, low cost. Absorbs moisture. | Textile rollers, light-load gears. |
| PTFE (Filled) | -200°C to +260°C | Very low friction, chemical resistance. Pure PTFE creeps under load. | Food processing, medical, pumps. |
| PEEK | Up to 260°C | High strength, chemical/hydrolysis resistant, steam sterilizable. High cost. | Aerospace, semiconductor, medical. |
| Ceramic (ZrO₂, Si₃N₄) | > 800°C | Exceptional corrosion resistance, extreme hardness, non-magnetic. | Robot joints, high-temp kilns. |
| Fiber-Wound | Varies | Handles extreme edge loads, dry-running, corrosion resistant. | Container cranes, offshore pivots. |
Use this matrix to rapidly pre-select the appropriate material family based on specific operating constraints.
| Primary Operating Condition | Suggested Material Category |
|---|---|
| Load > 50 MPa with impact; Temp > 300°C | Ceramic (Zirconia, Silicon Nitride) or Cast Iron embedded solid lubricant |
| Load > 50 MPa with impact; Temp ≤ 300°C | Copper-alloy embedded (high-strength brass or aluminum bronze) |
| Temp < -100°C or > 250°C, dry running | PTFE-based three-layer composite, PTFE-modified wrapped bushing, or PEEK |
| Temp -40°C to 100°C, moderate load | POM, PA, or POM-based modified composite wrapped bushing |
| Strong acid/alkali environment | PTFE, PEEK, or Ceramic |
| Water / seawater / high humidity | Stainless-steel backed PTFE composite, bronze-based, ceramic |
| Food / medical / clean room | PTFE or PEEK (verify FDA compliance) |
| Vacuum / absolutely oil-free | Carbon graphite, MoS₂ coated, or PTFE composites (outgassing considered) |
| Cost highly constrained | Polyamide (PA) or Cast Iron embedded |
| Lightweight required | Aluminum matrix composites or engineering plastics (POM, PA) |
| Low noise critical | POM or PA |
| Extreme edge load, oscillating | Fiber-wound composite or Copper-alloy embedded solid lubricant |
| General purpose / fallback | PTFE-based three-layer composite (wide adaptability) |
A fast mapping of common application conditions to standard bearing types.
| Application Condition | Suitable Material Type |
|---|---|
| Heavy load + High temperature | Copper-alloy with solid lubricant embedded |
| High temperature + Cost-sensitive | Cast iron with solid lubricant embedded |
| Broad temperature range + Oil-free | PTFE-lined three-layer composite |
| Frequent start-stop under load | POM-based modified composite bushing |
| General light duty | POM plastic |
| Food/Medical/Corrosive | PTFE or PEEK |
| Extreme temperature / Corrosion / Non-magnetic | Ceramic-based |
| Extreme heavy load, structural pivot | Fiber-wound composite |
| Vacuum / Oil-free | Carbon graphite |