Speed Coupling

High Speed and Engineered Special Gear Couplings satisfy a specific engineering need for custom coupling designs that require additional engineering. While standard components do exist, the unique requirements of individual applications will customize a coupling design.

Dynamically balancedFasteners are weigh balancedBody fitted bolts in reamed holesPrecision manufactured close tolerancesCustom design assistanceAvailable in sizes from 1 through 30 depending on model.

Lovejoy High Speed and Engineered Special Gear Couplings satisfy a specific engineering need for custom coupling designs that require additional engineering. While standard components do exist, the unique requirements of individual applications will customize a coupling design. (For stock gear couplings, please see our Gear Couplings product page.)

High Speed The Lovejoy / Sier-Bath F Series High Speed gear couplings are designed for exacting high speed, high efficiency performance beyond the ranges and limits of standard coupling specifications. Typical applications include high speed centrifugal and axial flow compressors, gas turbines, steam turbines, test stands, etc. High speed couplings are dynamically balanced as assemblies and match marked. Fasteners are weigh balanced in sets. Major diameter fit gear teeth, precision machined tolerances, and high quality components help to reduce the potential unbalance in the coupling assembly. Engineered – Many of the components are standardized, but the special requirements of certain applications will customize each design.

These couplings require specific customer input to properly design the coupling to suit the application.

FHS High Speed Close CoupledSimilar to standard F Type gear coupling; much tighter tolerancesMaximum speed is for assembly balanced couplingsComponent balancing available; may result in lower max speedMaterial: AISI 1045 steel
FHSA High Speed StandardAlloy Steel (core hardness of RC30-35); magnetic particle inspectedPrecision manufactured w/ ground bores & concentricity for dynamic stabilityDynamically balanced, piloted gear fit, body-fitted bolts in reamed holesFor nitrided teeth – specify Class AN & 85.5 min surface hardness on Rockwell 15N scale
FHSAA High Speed PrecisionAlloy Steel (core hardness of RC30-35); magnetic particle inspectedPrecision manufactured, dynamically balanced, piloted gear fit, body-fitted bolts in reamed holes.Low overhung moment, low moment of inertia, and extremely light weight. Balancing bands will be included, if required. For nitride gear teeth – specify Class AAN & 85.5 min surface hardness on Rockwell 15N scale.