ASTM B271 C95500 Copper-based self-lubricating inlaid graphite bearings
ASTM B271 C95500 Copper-based Self-lubricating Graphite Insert Bearings are self-lubricating, completely maintenance-free, consisting of a centrifugally cast bronze alloy (ASTM B271 C95500) for bearings with a bore diameter greater than 180 mm, or of a continuously cast alloy (ASTM B505 C95500) for bearings with a bore diameter less than 180 mm, highly wear-resistant, with a solid lubricant consisting of graphite filled on its contact surfaces and patterned according to the so-called "macro-distribution principle" and the type of movement the bearing will be subjected to.
The bearings are provided with a 15 to 20µm running-in film, the function of which is to ensure that the solid lubricant is transferred to the mating material during the first movement.
They must have a high static and dynamic load capacity, a stable coefficient of friction, no "stick-slip" effect, be corrosion-resistant, insensitive to dirt, and suitable for use in water, oil or grease.
For bearings with a bore diameter greater than 200mm, the tolerances should be calculated by our application engineering team according to the parameters of each application.
Your specific application may require special mounting instructions.
ASTM B271 C95500 copper-based self-lubricating inlaid graphite bearing (flange sleeve)
Mechanical properties of C95500 copper alloy:
Minimum yield strength N/mm²: 275
Minimum tensile strength N/mm²: 620
Hardness HB: 190
Elongation (%50 mm): 6
Tribological properties of ASTM B271 C95500 inlaid graphite bearing:
Maximum static load capacity N/mm²: 350
Maximum dynamic load capacity N/mm²: 200
Maximum sliding speed Vm/s: 0.5
Maximum PV coefficient MPa*m/s: 1.0
Working temperature ℃: -50~320
Friction coefficient, f (dry): 0.05~0.18
ASTM B271 C95500 copper-based self-lubricating inlaid graphite bearing (straight sleeve)
ASTM B271 Assembly and tolerance recommendations for C95500 inlaid graphite bearings:
Seat hole diameter: Tolerance: H7; Roughness (μm): 3.2
Bearing diameter (outer diameter): Tolerance: s6; Roughness (μm): 3.2
Bearing diameter (inner diameter): Tolerance: E8 before assembly, H10 after assembly; Roughness (μm): 1.2
Shaft diameter: Tolerance: d8; Roughness (μm): 0.2~0.8
Coaxiality inner/outer bearing: IT9
