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Couplings and companion flanges

BT Marine tapered couplings are bespoke design and manufacture, tailored to the specific application. We will calculate the key shear and mechanical characteristics and clearances to make sure all of the correct details are ascertained so that whether you are connecting directly to a gearbox output flange or via a flexible coupling system with a bobbin adaptor, your shaft line is connected securely and correctly.

BT Marine can supply IACS class compliant tapered and keyed couplings or for high power applications, a hydraulic fit coupling along with fitted connection bolts where required.

As part of our rigorous inspection programme, shaft lines are fully assembled with their mating components such as propellers and half couplings in our machine shop and checked for fit prior to despatch in order that you can be assured that all the components will fit seamlessly together upon final assembly.

In addition to taper couplings, we offer a range of coated parallel bored clamp style couplings to suit a wide variety of smaller gearbox output flanges – these are shown in the table below.

Part numb Gearbox std bore max over-bore flange dia register diameter no holes hole dia pcd
102-250Y Yanmar 25mm 30mm 102mm male 50mm 4 10mm 78mm
102-250P PRM/TMC/ZF 25mm 30mm 102mm male 2.5” 4 10mm 3.25”
102-254P PRM/TMC/ZF 1” 1.25” 102mm male 2.5” 4 10mm 3.25”
127-300P PRM/TMC/ZF 30mm 44.45mm 127mm male 2.5” 4 11.2mm 4.25”
127-350Y Yanmar 35mm 44.45mm 127mm male 65mm 4 10mm 100mm
127-400P PRM/TMC/ZF 40mm 44.45mm 127mm male 2.5” 4 11.2mm 4.25”
146-381Z ZF 1.5” 50.8mm 146mm female 3” 6 12.7mm 4.75”
146-381T Twin Disc 1.5” 50.8mm 146mm female 3” 6 16mm 4.75”
146-381P PRM 1.5” 50.8mm 146mm male 3” 6 12.7mm 4.75”
146-400Z ZF 40mm 50.8mm 146mm female 3” 6 12.7mm 4.75”
146-400T Twin Disc 40mm 50.8mm 146mm female 3” 6 16mm 4.75”
146-400P PRM 40mm 50.8mm 146mm male 3” 6 12.7mm 4.75”
146-450Z ZF 45mm 50.8mm 146mm female 3” 6 12.7mm 4.75”
146-450T Twin Disc 45mm 50.8mm 146mm female 3” 6 16mm 4.75”
146-450P PRM 45mm 50.8mm 146mm male 3” 6 12.7mm 4.75”
146-500Z ZF 50mm 50.8mm 146mm female 3” 6 12.7mm 4.75”
146-500T Twin Disc 50mm 50.8mm 146mm female 3” 6 16mm 4.75”
146-500P PRM 50mm 50.8mm 146mm male 3” 6 12.7mm 4.75”
146-508Z ZF 2” 50.8mm 146mm female 3” 6 12.7mm 4.75”
146-508T Twin Disc 2” 50.8mm 146mm female 3” 6 16mm 4.75”
146-508P PRM 2” 50.8mm 146mm male 3” 6 12.7mm 4.75”

 

BT Marine Propellers Ltd.
Propulsion Technology Centre, Black Swan Road, Dawlish, United Kingdom, EX7 0GF
Tel: +44 (0)1626 864378    |   info@btmarinepropellers.co.uk