Bevel-gear documentation: A proper working drawing for a bevel gear includes both the gear blank dimensions (outside diameter, face width, bore/keys, mounting) and the cutting/tooth data needed for manufacture. Decide whether this statement is correct.

Introduction / Context: Manufacturing a bevel gear requires both a machinable blank and precise tooth specifications. Drawings that omit either aspect force guesswork or extra RFIs. This question checks understanding of what belongs on a complete working drawing.

Given Data / Assumptions:

• Blank definition: OD, hub/boss, face width, bore, keyways, material, heat treat.
• Tooth data: module/DP, pressure angle, numbers of teeth, pitch angles, hand/spiral data (if spiral), mounting distance.
• Notes: inspection, surface finish, balance, and runout tolerances.

Concept / Approach: The shop must be able to make and inspect the part. Blank data enables turning/milling prior to tooth cutting; tooth data directs the gear cutting/grinding operation. Both must be present for a standalone, unambiguous part definition suitable for procurement and QA.

Step-by-Step Solution:1) Specify blank geometry and tolerances.2) Provide full gear data for cutting/grinding.3) Add mounting distance and datum scheme for inspection.4) Include notes on heat treatment and finishing.

Verification / Alternative check: Vendor checklists for gear drawings require both blank and tooth data; coordinate measuring machine (CMM) programs depend on these specs.

Why Other Options Are Wrong:Withholding tooth data prevents manufacturing to spec; leaving out blank data blocks pre-cut preparation.Claiming the vendor defines the blank contradicts controlled part-number practice.

Common Pitfalls: Missing keyway tolerances; inconsistent face width vs mounting distance; omitting crown/relief notes.

Final Answer: Correct