In limits and tolerances terminology, what is meant by deviation?
The algebraic difference between a size and the corresponding basic size
To solve the problem and clarify the concept of deviation in limits and tolerances terminology, let's explore the options provided and identify the correct answer:
- The difference between the maximum size and minimum size limits: This definition describes the term "tolerance," which is the allowable variation in size. It is not what deviation represents.
- The theoretical dimension used as reference in engineering drawing: This describes the "basic size" or "nominal size," which serves as a reference dimension. It is not the definition of deviation.
- The algebraic difference between a size and the corresponding basic size: This is the correct definition of deviation. Deviation is the difference between the actual measured size and the basic size specified in the drawing. It reflects how much a manufactured dimension differs from its intended basic size.
- The measured dimension obtained after manufacturing process: This describes the "actual size" or "measured dimension," which refers to the dimension as it is after manufacturing. Although related, it is not what deviation means.
Therefore, the correct answer is: The algebraic difference between a size and the corresponding basic size.
Explanation:
In engineering terms, deviation is used to assess the accuracy of a manufactured part. When a part is produced, it may not exactly match its design size due to various factors in the manufacturing process. Deviation helps identify how much the size deviates from the intended basic size, which is crucial for quality control and ensuring that parts fit and function properly in assemblies.
The concept of deviation is fundamental in understanding how well a part complies with design specifications, and it aids in improving manufacturing processes and reducing defects.
By clearly understanding and applying these concepts, engineers ensure that manufactured products meet their intended design requirements, leading to reliability and efficiency in their applications.
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Important Questions from Limits and Fits
The following limits are specified in a limit system, to give a clearance fit between a hole and a shaft:
\(Hole = 25_{ - 0.01}^{ + 0.02}\;mm\;and\;shaft = 25_{ - 0.02}^{ - 0.004}\;mm\)
Determine tolerance on a shaft.
When tolerance is given on one side of the basic dimension, it is called:
In a hole and shaft tolerance system, the small letter indicates fundamental deviation of________
Which of the following fit is produced with the shaft dia 25.025 and bore dia of 24.994?
In mass production, parts made to definite limit of error is called as ______
