The standard taper magnitude commonly designed on a cotter is_________________?
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Answer: C. 1 in 24
Explanation
Machine cotters are specifically standardized with a taper magnitude of exactly 1 in 24. This precise taper angle ensures a strong self-locking joint without jamming permanently. Design calculations for cotter joints consistently incorporate this standard geometric taper ratio. A cotter is a flat wedge-shaped key used to connect two coaxial rods subjected to tension or compression. Tapered fasteners provide easy assembly and disassembly while maintaining secure alignment during operation. Standardization simplifies manufacturing processes and ensures interchangeable replacement parts across machinery.
Cotter joints are widely used in steam engine crossheads piston rods and valve mechanisms. Mechanical engineers rely on standard tapers to design reliable temporary connections in heavy machinery. Proper taper design prevents accidental loosening while allowing maintenance technicians to disassemble joints easily. Taper ratios like 1 in 5 are excessively steep and fail to provide adequate self-locking capability. Alternative ratios such as 1 in 10 are used for different mechanical applications like tapered keys. Standard engineering manuals universally specify 1 in 24 as the correct taper for cotters.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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