Four bolt couplings are used on four bolt hole gearbox output flanges. Spigots or pilots can be either male or female, as determined by the gearbox. Isoflex couplings are configured to the most common flanges.
The IV range of Isoflex couplings is specifically developed to operate in a tensile condition created by integral V drives.
* Couplings IFC-4700-95, IFC-4800-95 and IFC-4900-95 have a Spicer bolt pattern
While designed for marine use, these couplings are used in many industrial driveline applications too.