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?

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