Page 93 - A fundamnetal of Engineering Design
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Square and Rectangular Parallel Keys
The most common type of key for shafts up to 6 ½ inches in diameter is
the square key, as illustrated below. The rectangular key is
recommended for larger shafts and is used for smaller shafts where the
shorter height can be tolerated.
Figure 3-3 Illustration of keys. (a) dimensions of shaft with keyway in shaft and hub;
(b) square parallel key; (c) rectangular parallel key
