ANDRITZ Spare Parts Centrifugal Pump Bearing Housing

Our technical brand serves as a single-source partner for fluid machinery solutions worldwide — covering component supply, system integration, and international field services. The product portfolio includes pumps, frequency converters, servo drives, PLC-HMI automation platforms, motor control centers, electric motors and gearboxes, mechanical seals and assemblies, couplings, and gear transmissions. Field engineering includes overseas FARO 3D scanning, laser alignment, pump commissioning, and on-site troubleshooting by our own engineers.

ANDRITZ Bearing Housing is the stationary casting or fabrication that supports the pump shaft bearings, maintains their correct axial and radial position relative to the casing, and contains the lubricant (oil or grease) that ensures reliable bearing operation. In overhung impeller pumps, the bearing housing is typically a separate bracket assembly bolted to the casing back cover. In between-bearings pumps, the bearing housings are separate end units mounted to the casing on the drive and non-drive ends.

The bearing housing must satisfy multiple design requirements: provide precise concentricity between the bearing bores and the shaft centerline, maintain correct alignment with the casing bore, accommodate thermal expansion of the shaft without over-constraining the bearings, contain lubricant without leakage past the shaft seals, and allow heat dissipation from the bearing operating temperature. A bearing housing that fails on any of these parameters — due to casting distortion, bore misalignment, seal groove error, or core shift during casting — will compromise the entire pump assembly regardless of the quality of the bearings and shaft installed inside it.

Our ANDRITZ replacement bearing housings are manufactured using FARO 3D scanning for complete geometry capture, CNC machining of all critical bores and register fits, and full dimensional inspection on CMM equipment.

• Bearing Bore Concentricity — Both bearing bores (drive-end and non-drive end) machined in a single setup to ensure the bearing outer diameter seats are coaxial to within 0.05 mm TIR; misaligned bores cause uneven bearing load distribution and premature failure
• Register Fit Precision — The housing-to-casing register diameter (spigot fit) machined to H7/h6 tolerance; ensures the bearing housing centerline coincides with the casing centerline when assembled
• Oil Sump Geometry — Internal cavity volume, drain-back passages, and oil return path designed to maintain correct oil level and prevent oil starvation during start-up transient
• Seal Groove Accuracy — Lip seal or labyrinth seal bore machined with correct depth, width, and surface finish per seal manufacturer specification (Ra ≤ 1.6 μm typical)
• Cooling Jacket Option — For high-temperature process pumps, bearing housings available with integral cooling water jacket or fins for air cooling