This flanged bronze bushing is a plain bearing designed to reduce friction between a 25mm shaft and a 30mm housing bore. Manufactured from SAE 660 continuous-cast bronze, it provides a maximum static load capacity of 28 MPa and a PV limit of 1.75 MPa·m/s.
The SAE 660 bronze flanged bushing with 25mm inner diameter, 30mm outer diameter, and 30mm length is engineered for radial loads up to 14 kN at 25°C. Unlike generic sleeves, this specific size targets shaft diameters common in fractional-horsepower electric motors and light-duty conveyors. The 2.5mm wall thickness balances structural rigidity with heat dissipation—critical because bronze expands 1.8 µm/m·°C, and a 100°C rise increases the bore by 0.0045mm. That expansion is accounted for in the initial clearance range of 0.025–0.075mm, which prevents seizure while limiting radial play to under 0.1mm. The flange, 40mm in diameter and 5mm thick, seats against a housing face to absorb axial thrust up to 200 N without requiring a separate thrust washer.
Typical deployment includes packaging machinery, where the bushing supports a 25mm drive shaft rotating at 300 RPM under 5 kN radial load. In agricultural equipment, the bronze alloy resists dust and moisture that would degrade polymer bushings within 500 hours. A key pain point this size solves: standard 25mm bore bushings often lack flanges, forcing engineers to add retaining rings that consume 8–10mm of axial space. This flanged design eliminates that extra hardware, reducing assembly time by approximately 15 minutes per unit. The operating temperature range of -40°C to 200°C covers cold-storage conveyor systems and engine-adjacent linkages without requiring special lubricants.
Compared to the 20mm ID variant in the same series, this 25mm bushing offers 56% greater projected bearing area (750mm² vs 480mm²), translating to a 40% higher radial load rating. The trade-off is a 20% increase in outer diameter, which may require housing bore adjustments. For applications with space constraints, the 20mm version is preferable; for higher load demands, this 25mm unit avoids the need for a larger 30mm bore series. The 30mm length also provides better shaft support than the 20mm length option, reducing deflection by 33% under identical loads. These quantitative differences matter when selecting between series variants—generic 'high-quality bronze bushing' claims do not.
