Lathe “size” specification standards When specifying the size/capacity of a center lathe for purchase or comparison, which of the following parameters are commonly stated as part of the size?
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ALength between centres only
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BSwing (maximum diameter) over the bed only
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CSwing over the carriage/cross-slide only
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DAll of these are quoted together as size/capacity parameters
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EOnly spindle nose type is considered for size
Answer
Correct Answer: All of these are quoted together as size/capacity parameters
Explanation
Introduction / Context:Lathe “size” communicates the envelope of work that can be accommodated. Buyers rely on standardized terms to compare machines across brands and models.
Given Data / Assumptions:
- Conventional engine/center lathes.
- Manufacturers list several capacity numbers in catalogs.
Concept / Approach:The most common capacity descriptors are: swing over bed (maximum diameter that clears the bed), swing over carriage or cross-slide (smaller than swing over bed), and distance between centers (maximum length of work mounted between centers). Together they express the practical workpiece envelope.
Step-by-Step Solution:Identify key diametral limits: swing over bed and swing over carriage.Identify length limit: distance between centers.Combine these to form the machine’s stated size/capacity.
Verification / Alternative check:Machine brochures typically list all three figures prominently for quick comparison.
Why Other Options Are Wrong:
- Listing only one parameter gives an incomplete picture of capacity.
- Spindle nose type concerns tooling interface, not overall size capacity.
Common Pitfalls:Ignoring swing over carriage when planning setups; assuming distance between centers equals actual machining length after chuck/center drill allowances.
Final Answer:All of these are quoted together as size/capacity parameters