R&D flexible propeller shaft coupling 4″ Enfield, Sonic 181 Nm.

Gearbox flange dimensions:
A flange diameter: 101.60 mm
C&D number of holes × diameter: 2 × 11.20 mm
B pitch: 76.00 mm

Flexible shaft coupling details:
Diameter: 108.00 mm
Length: 41.70 mm
Thread: 7/16 UNF
Capacity /100 rpm: 1.87 kW

Flange type:
Enfield and Sonic 4″

Gearbox type:
2 Bolt 4″