The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

Section 37.—FASTENING WHEELS TO SHAFTS.

Besides the ordinary plan of shrinking them on while hot, the following are the chief devices in use:—

[634]. Square shaft and single key.

[635]. Square shaft and two keys at right angles; two keys should always be used for a square shaft, unless it has been machined to fit to the hole.

[636]. Round shaft and hollow key.

[637]. Round shaft and flat key.

[638]. Round shaft and sunk key.

[639]. Staked fastening, four keys, usually on flats cut on shaft, but better if slightly sunk into shaft.

[640]. Set screw. Cannot be depended on for any but light strains.

[641]. Taper pin.