Abstract
A key is a detachable component used to connect a shaft and the hub of a power-transmitting element, which enables transmission of torque and power between them. Rectangular keys, also called flat keys, are usually used for large shafts and are also recommended for small shafts where the shorter key height can be tolerated. Designing the key includes determining its dimensions (height, width and length) according to the transmitted torque and the shaft diameter. In this chapter, three methods are presented for designing rectangular keys.
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Abbreviations
- b :
-
The width of key, mm
- d sh :
-
Shaft diameter, mm
- h :
-
The height of key, mm
- L :
-
The effective (or working) length of key, mm
- L s :
-
Standard length of key, mm
- P 0 :
-
Allowable bearing stress, MPa
- R e :
-
Yield strength, MPa
- T :
-
Torque, Nm
- t 1 :
-
The effective (or working) height of key, mm
References
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Yaghoubi, M., Tavakoli, H. (2022). Rectangular Keys. In: Mechanical Design of Machine Elements by Graphical Methods. Materials Forming, Machining and Tribology. Springer, Cham. https://doi.org/10.1007/978-3-031-04329-1_8
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DOI: https://doi.org/10.1007/978-3-031-04329-1_8
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