PM IB-500

Pacific Marine PM IB-500 is an intermediate bearing for 500 mm diameter shafts, offering a 1 m long white‑metal bearing surface to support the shaft between main thrust bearings and downstream components. The supplied category identifies it as Intermediate Bearing, and it is normally installed along the intermediate propulsion shaft between the main engine or gearbox and the stern tube. In that role, its primary purpose is to support the shaft line radially and maintain the designed shaft alignment between major propulsion components. Unlike the stern-tube bearing, an intermediate bearing is located inside the hull and is readily observable during operation, making temperature, oil condition and alignment especially useful condition indicators. Within the supplied list, neighbouring variants are distinguished by their model designations and naming, while the source does not state further model-specific hardware differences. No additional performance, approval or construction detail is inferred from the model code beyond the information supplied in the source record. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.