ANDRITZ Rigid Flexible Precision CNC Machining Pump Shaft Coupling

Our brand was established to supply comprehensive fluid machinery solutions worldwide — integrating product delivery, technical engineering, and on-site assistance under a single coordinating entity. The products and systems we cover include centrifugal and positive displacement pumps, adjustable frequency drives, servo positioning controllers, integrated control and HMI workstations, switchgear and motor control assemblies, electric motors and speed-reducing gearboxes, mechanical sealing systems and cartridge units, flexible and rigid shaft couplings, and gear-type power transmission equipment. Overseas, we offer hands-on technical services carried out by our own specialists — FARO 3D laser scanning to capture pump geometry for reverse manufacturing, precision laser alignment of driver-pump trains, pump start-up supervision and full commissioning, and on-site machinery troubleshooting and repair support.

ANDRITZ Pump Coupling is the mechanical device that connects the pump shaft to the driver (electric motor, engine, or turbine) to transmit torque while accommodating minor misalignment between the two shafts. The coupling also provides controlled axial float for thermal expansion and dampens torsional vibration that would otherwise be transmitted back into the pump and driver bearings.

Three main types of flexible couplings are used in ANDRITZ pumps:

• Elastomeric (Rubber/Polyurethane) Coupling — Uses a flexible element between two flanged hubs. Provides vibration damping and electrical isolation. Most common for standard process pumps up to 200 kW. Examples: Lovejoy jaw-type, Centaflex, Fenaflex
• Grid Coupling — Uses a serpentine spring steel grid that engages both hub teeth. High torque density and excellent shock load capacity. Common in slurry and heavy-duty pump service
• Diaphragm / Disc Coupling — Uses a flexible metal diaphragm pack or disc pack to transmit torque. Zero backlash, no wearing parts, and maintenance-free. Specified for high-speed and high-temperature pumps where elastomeric elements would degrade

Our ANDRITZ replacement couplings are sourced from leading coupling manufacturers or manufactured to OEM specification, with hub bore sizes and keyways machined to match the customer's pump and driver shaft dimensions.