On working/detail drawings, a worm and its mating worm gear are typically detailed on separate sheets or separate detail views, while their interaction appears on an assembly drawing. Evaluate whether the statement “The worm and gear are usually drawn in the same detail drawing” is correct.

Introduction / Context:
Detail drawings define a single part unambiguously for manufacture and inspection. Assembly drawings show how parts fit together and include center distances, alignment, and notes for mounting. This question probes documentation practice for worm drives, which involve two distinct parts: the worm (screw-like) and the worm gear (helical toothed wheel).

Given Data / Assumptions:

• Detail drawings are part-specific: dimensions, tolerances, materials, and finishes for one part.
• Assembly drawings illustrate fit and function of multiple parts together.
• Worm and worm gear are manufactured by different processes and have different specifications.

Concept / Approach:
Because each component requires unique tolerances, materials, and tooth data, best practice is to issue a separate detail drawing for each component. The pair’s meshing parameters (module/DP, pressure angle, lead, center distance) appear on the assembly or in a gear data table, not as combined part dimensions on one detail unless the organization explicitly combines them (uncommon for production).

Step-by-Step Solution:
1) Identify drawing purpose: detail vs assembly.2) Partition specifications: part-specific data vs meshing/fit data.3) Produce individual detail drawings for worm and for worm gear.4) Provide an assembly drawing for shafting, bearings, and mesh alignment.

Verification / Alternative check:
Company CAD standards typically template separate title blocks and part numbers per detail sheet; gear vendors request part-specific drawings for manufacture and QA.

Why Other Options Are Wrong:
“Correct”: Blurs part accountability and complicates inspection.“Only assemblies are ever drawn”/“Gears never shown”: Both contradict standard documentation workflows.

Common Pitfalls:
Cramming two parts on one detail; omitting gear data from assembly notes; failing to keep center distance tolerancing consistent across related drawings.

Final Answer:
Incorrect