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Mechanical Design Toolkit

Professional Updated 2026.08.30

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About this skill

Problem

In mechanical design, calculations for gears, bearings, bolts, shafts, and springs often involve different standard editions, material parameters, and operating conditions. Manual lookups can easily miss details such as tolerance grades, preload, hardness conversion, L10 life, or section strength. This skill keeps common design and check calculations together in a set of scripts and data files, so engineers can query parameters or run calculations directly in conversation.

How It Works

The skill covers mechanical component design and verification: gear geometry, contact strength, root bending strength; bolt tension, shear, bearing, preload, and torque; bearing selection, L10 life, clearance class, and static capacity; plus material data, hardness conversion, fits, key connections, shaft strength, springs, and deflection. Inputs can be natural-language requests or explicit parameters. The skill selects the relevant module, such as gear_calculator.py, bearing_calculator.py, or tolerance_fit_calculator.py, and uses data files such as materials.json, bearings.json, and threads.json to return calculated results or selection parameters.

Boundaries

The skill provides theoretical values based on standard formulas and material data, not final engineering decisions. Real designs still require checking load spectra, temperature rise, lubrication, assembly error, fatigue, current standard revisions, and manufacturing tolerances. Strength results should be reviewed with safety factors and human judgment; selection results should be validated against packaging, cost, and availability.

Use Cases

  • When sizing a bevel gear drive, compute geometry from module and tooth count and check contact and bending strength per GB/T 10062.
  • When selecting deep-groove or tapered roller bearings, look up specifications, L10 life, C2/C3/C4 clearance, and static load capacity.
  • When checking flange or motor mounting bolts, calculate tension, shear, bearing, preload, and torque, and recommend thread sizes.
  • When estimating shaft, beam, or section strength, query material properties and verify bending, torsion, shear, and von Mises stress.

Best For

  • Mechanical engineers who design drivetrain components and need to check gears, shafts, and keys against GB standards.
  • Engineers preparing assembly plans who need to select bearings, couplings, and bolts and verify fits.
  • Structural engineers compiling strength reports who need material data, section capacity, and beam deflection.
  • Design assistants maintaining part selection tables who need thread, bearing, chain specs, and hardness conversion.