Which of the following factors is considered in selection of the type of key?
1. Power to be transmitted
2. Tighthness of fit
3. Stability of connection
5. Direction of rotation Select the valid factors:
The standard taper provided in taper key is
The industrial practice is to use a square key with dimension
where, b = width of key
h = height or thickness of key
d = diameter of shaft
Suggest the key to be used when relative axial movement of the hub is required
(i) A woodruff key is a sunk key in the form of an almost semicircular disk of uniform thickness.
(ii) The woodruff key can be used on tapered shaft because it can align by slight rotation in the seat.
(iii) The extra depth of key in the shaft prevents its tendency to slip over the shaft.
(iv) The woodruff key does not permit axial movement between the shaft and the hub.
Which key is preferred for the condition where a large amount of impact type torque is to be transmitted in both directions of rotation?
The feather keys are generally
Select the odd one out
The feather key, woodruf key and the gib head key are the sunk keys.
These are half sunk into the shaft and into the hub. Saddle key is sunk into the hub only.
In a flange coupling, the weakest element should be
Which of the following is not a typical characteristic of the Oldham’s flexible coupling?
For a flange coupling, the diameter of bolts is worked out from the relation:
where D is the diameter of solid shaft and n is the number of bolts.