Fig. 2632.
[Fig. 2632] represents a form of coupling suitable for light shafting. It consists of two halves a a, of cast iron, which are drawn together by the bolt c; the centre of the coupling is recessed to enable the coupling to take a better hold on the shaft, which is prevented turning by the pins d d. This coupling has no projections to catch clothes or belts, and is quickly applied or removed.
Fig. 2633.
[Fig. 2633][38] represents a form of coupling for heavy duty, the transmitting capacity only being limited by the strength of the projections a. If the shafts are not axially in line, this form of coupling accommodates the error, since the projections a may slide in their recesses, while if the axial lines of the shafts should vary from flexure of the bearings or foundations, as in steamships, clearance between the ends of a and the bottom of the recesses may be allowed, as shown at b.
[38] From Rankine’s “Machinery and Millwork.”