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Describe the main operating features of any one of the following: Ratchet and pawl, Micrometer, Lathe tailstock. - Leaving Cert Engineering - Question i - 2011
Question i
Describe the main operating features of any one of the following: Ratchet and pawl, Micrometer, Lathe tailstock.
Worked Solution & Example Answer:Describe the main operating features of any one of the following: Ratchet and pawl, Micrometer, Lathe tailstock. - Leaving Cert Engineering - Question i - 2011
Step 1
Describe the main operating features of a Ratchet and pawl
Answer
A ratchet and pawl mechanism is used to allow a shaft, axle or pin to rotate in one direction only. The teeth on the ratchet wheel are shaped so that the pawl slides over them in one direction and engages to restrict movement in the opposite direction. This mechanism is commonly used in various tools such as ratchet spanners and fishing reels, allowing for controlled motion while preventing backsliding.
The pawl can be lifted out of engagement to permit reverse movement temporarily, and its design is critical for the efficiency and reliability of devices like ratchet screwdrivers and winding machines.