Maintenance-Free Aluminum Bronze Self-Lubricating Bushings

Short Description:

Product Specifications
Name： Aluminum Bronze Self-Lubricating Graphite Bushing
Standard： ASTM B505 / B271, UNS C95400 / C95500 / C95800, RoHS Compliant, REACH Compliant
Material： C95400 (Aluminum Bronze), C95500 / C95800 (Nickel Aluminum Bronze) with Embedded Solid Graphite Lubricant
Surface： Precision Machined, Graphite Plugs Evenly Distributed
Inner Diameter (ID)： 20mm – 300mm
Outer Diameter (OD)： 40mm – 400mm
Length： 20mm – 500mm
Product Features: Maintenance-free operation with embedded graphite lubrication · Excellent dry-running performance · Superior wear and seizure resistance · Outstanding corrosion resistance in harsh environments · High load capacity and shock resistance · Low coefficient of friction · Long service life without additional oiling
Application Field: Heavy-duty construction machinery, Mining and quarrying equipment, Marine and offshore applications, Hydraulic cylinders and presses, Injection molding machines, Agricultural equipment, Steel mills and rolling equipment, Pump and valve components in corrosive fluids

Send email to us

Product Detail

Product Tags

Video

Aluminum Bronze Self-Lubricating Graphite Bushing – Process & Quality Assurance Statement
Our aluminum bronze graphite bushings are engineered for reliable, long-term performance in applications where traditional lubrication is difficult or impossible.

Key process features

Production follows a proven process to ensure consistent self-lubricating properties and structural integrity:
●Alloy Casting: High-quality ingots are melted and cast (centrifugal or continuous) into dense sleeves with controlled chemistry.
●Heat Treatment: Annealing optimizes hardness, toughness, and eliminates internal stresses.
●Rough Machining: CNC turning establishes precise outer and inner dimensions.
●Graphite Plug Insertion: Solid graphite plugs are precisely drilled and pressed into the bearing surface in optimized patterns for even lubrication.
●Finish Machining: Final honing and sizing achieve tight tolerances and smooth running surfaces.
●Surface Treatment: Optional break-in coating applied to enhance initial run-in performance.
●Cleaning & Packaging: Thorough cleaning removes debris, followed by protective packaging to prevent damage.

Quality control system

● Full traceability from ingot heat number to finished bushing
● Retention of material samples and records ≥3 years for third-party testing (SGS, BV, TÜV, etc.)
● 100% inspection of critical attributes:
• Chemical composition (spectrometric analysis)
• Graphite plug distribution and retention (visual and dimensional checks)
• Dimensional accuracy (CMM and bore gauges; typical ID tolerance ±0.02mm)
• Surface finish and hardness (profilometer and Rockwell testing)
• Load and wear performance (sample testing per batch)
● Internal standards exceed ASTM B505 requirements. Typical C95400 with graphite: High compressive strength ≥650 MPa, Excellent dry friction performance, Superior resistance to seawater and chemicals.
● ISO 9001:2015 certified manufacturing ensures every self-lubricating bushing delivers dependable, maintenance-free operation in demanding conditions.