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When taking a flanged coupling apart, the rim must first be rotated and checked for mate marks. If no marks show, a pair of spot marks should be “popped” (inserted).
recess flange A
recess in flange A nut
key flange B coupling bolt
hub key
shaft
shaft
spigot on flange
coupling nut and bolt hub flange keyway
Figure 2.5 Flanged coupling
Marine coupling A marine coupling is a type of permanent (fast, rigid or fixed) coupling comparable to a flange coupling. Tis type of coupling is used mainly in marine engineering on the drive shaſts of ships’ propellers. Tey have the ability to deal with enormous thrust loads.
Did you know?
A thrust load is a force exerted in any direction and is eliminated by a thrust bearing (see module 4).
A marine coupling is identified by the tapered-machined (conical) bolts that hold the shaſt and flange-units together. Te shaſt and flange on the driving end are normally cast or forged as a unit. Te tapered-machined (conical) bolt holes are bored perfectly and eased to a perfect taper only when the flanges are mated (together).