Regal Rexnord
Driveshaft Couplings
Regal Rexnord driveshaft couplings are heavy - duty industrial universal - joint(Cardan) shaft assemblies designed to transmit torque between widely separated, significantly misaligned, or dynamically moving shafts — the primary coupling choice for applications where the driving and driven shafts are not even approximately aligned.Fabricated from high - strength alloy steel tubing with precision - machined universal joint yokes and crosses at each end, these couplings accommodate angular misalignments up to 25° per joint(in standard designs) and can span distances from under one meter to over 12 meters, making them indispensable for rolling - mill drives, pump drives between engines and remote - mounted equipment, and mobile - equipment power take - off(PTO) applications.Under the Ameridrive and Matrix brands, Regal Rexnord driveshaft couplings are used in steel and aluminum mills, mining conveyors, marine propulsion drivelines, paper - machine section drives, and large - pump installations where the prime mover and driven machine are on different foundations subject to differential settling.With torque capacities from several hundred Nm to over 1,000,000 Nm, custom length and spline - slip configurations, and precision balancing for operating speeds to 5,000 RPM, our industrial driveshaft couplings deliver the combination of angular range, torque density, and engineered reliability that the world’s most demanding drivetrains require.
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Extreme Angular Misalignment Capacity
Standard universal - joint designs accommodate continuous operating angles of 5° to 15° with peak angles to 25°, enabling drivetrain layouts that would be impossible with parallel - axis coupling technologies.
Variable - Length Slip Sections
Splined telescoping sections accommodate axial length changes due to thermal growth, machine - frame flexure, or dynamic motion between independently supported driver and driven machines.
High - Torque, Long - Span Capability
Alloy - steel tube shaft assemblies transmit full torque over spans exceeding 12 meters with controlled torsional wind - up and critical - speed characteristics engineered for the specific application.
Grease - Lubricated Anti - Friction U - Joints
Needle - roller - bearing cross assemblies with high - pressure grease fittings and integral seal protection deliver long service life in contaminated steel - mill and mining environments.
Precision Balancing for High - Speed Operation
Multi - plane dynamic balancing to ISO 1940 G6.3 or better, enabling operation at 3,000 to 5,000 RPM on motor - to - pump and turbine - to - gearbox applications.
Custom Flange & Hub Configurations
Designed to match the specific flange - bolt patterns, pilot diameters, and shaft - end geometries of the connected equipment, eliminating the need for adapter plates and the balance issues they introduce.
Driveshaft Couplings in Steel & Aluminum Rolling Mills
Rolling mills present one of the most extreme drivetrain challenges in industry: massive torque in the millions of Nm, varying roll positions that change the geometric relationship between motor and roll, high shock loading from ingot entry and strip tension changes, and pervasive scale, coolant spray, and debris contamination.Regal Rexnord Ameridrive driveshaft couplings are the industry standard in this environment.Our universal - joint shaft assemblies transmit power from the mill's pinion stand to the work rolls, accommodating the vertical displacement of the top roll as pass height changes and the angular deflection produced by roll bending and frame stretch. Hardened yoke and cross assemblies with enhanced corrosion protection withstand the scale and water contamination that would destroy conventional coupling seals. Section-mill and bar-mill applications utilize our quick-change coupling designs that allow roll changes to be completed in minutes rather than hours — a productivity multiplier in mills where every minute of downtime represents tonnes of lost production. Across hot-strip mills, plate mills, tandem cold mills, and long-product mills, Regal Rexnord driveshaft couplings have proven that they can deliver the torque capacity, angular flexibility, and contaminant survival essential for continuous steel production.
Marine Propulsion & Large - Pump Driveline Couplings
Inland and coastal marine vessels — towboats, ferries, dredges, and workboats — utilize Regal Rexnord driveshaft couplings in main propulsion drivelines connecting medium - speed diesel engines to reduction gears or directly to propeller shafts.These couplings must accommodate the static misalignment between engine and shaft bearings on separate foundations, the dynamic flexure of the hull under varying sea states and loading conditions, and the axial thermal growth of the drivetrain as the engine room transitions from cold - iron to full - load operating temperature.Regal Rexnord marine driveshafts are engineered with stainless - steel slip splines, sealed U - joint bearings with extended re - lube intervals, and corrosion - resistant coatings that meet the salt - spray and humidity requirements of class society rules(ABS, DNV, Lloyd’s).Large vertical and horizontal pump installations — municipal water supply, flood - control pumps, and cooling - water circulation pumps — employ our driveshaft couplings where the motor or engine is located at grade and the pump is located at a lower elevation or at a significant offset, and the connecting shaft must span the distance and misalignment without transmitting harmful radial loads to the pump bearings.