Bellows couplings feature zero backlash
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Stock Drive Products/Sterling Instrument product story
Edited by the Engineeringtalk editorial team
Oct 11, 2005
A new series of seven inch and seven metric bellows couplings manufactured by Sterling Instrument feature the patented Fairloc integral hub fastening system which eliminates marred shafts.
A new series of seven inch and seven metric bellows couplings manufactured by Sterling Instrument feature the patented Fairloc integral hub fastening system which eliminates marred shafts.
The choice of Fairloc rotating component fastening system helps phase adjustment, timing, position adjustment and frequent removal problems while adding positive metal-to-metal fastening strength along both hub sections.
It is compact, self-contained and offers a small coupling hub envelope.
The couplings, identified as the S50FP9 Series, feature zero backlash and are designed to correct for angular and parallel axis misalignment thereby permitting for looser tolerances in mounting components.
In addition they absorb end play in shafts and dampen both vibration and noise levels.
They are both easy to install and readily adjustable on the shaft.
These couplings are designed to fit shafts ranging from 3 to 12mm in diameter and have a maximum torque range of between 0.85 and 2.12Nm.
They can accommodate a maximum angular misalignment and parallel offset of 5 to 6 degrees and 0.4mm, respectively.
These couplings feature a phosphor bronze bellows section, brass hubs and a tin plate finish.
The Fairloc system consists of two slots that are machined into the aluminium hub, one orientated radially the other angularly, to create a transverse wedge which remains attached to the solid portion of the hub on one side.
The resultant cantilevered clamping section has a tapped hole to accept a cap screw which passes through a clearance hole in the solid portion of the hub, and into a threaded hole in the transverse wedge section.
As the screw is tightened, the cantilevered section clamps the shaft securely.
The screw can be tightened and released repeatedly without marring the shaft or affecting its torque transmitting abilities.
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