Mechanical engineer to review 10 mechanism CAD designs this weekend (Nov 14-16)

On Policy writes mechanical design problems. Each one is a written engineering brief (loads, interfaces, motion and process rules) plus a reference CAD design (STEP) with its load calculations. An automated checker grades the designs people submit. Before these go out, we want an independent, experienced mechanical engineer to review them.
SCOPE
1. Review about 10 reference designs against their briefs. Check strength and stress, that pins, shafts, bearings and gears are sized for the stated loads, fits and clearances through the full range of motion, and whether each part can be made by the stated process. Flag any gaps or ambiguity in each brief.
2. Spot-check about 20 submitted designs that our checker passed or failed, and say whether you agree with its result.
Mechanisms: scissor jack, toggle clamp, Geneva indexer, worm reducer, planetary reducer, cycloidal reducer, spur gear reducer, ratchet winch, cam and follower, and over-centre latch. Engine parts may follow later if this goes well.
DELIVERABLE
A short written verdict for each item: whether it passes (or whether you agree with the checker), the key checks or numbers behind that, and any problems with the brief. Hand calculations are fine. Use FEA where it is the right tool.
TIMING (US Central)
Start Saturday, Nov 14 and finish by 9 AM CT on Monday, Nov 16. Weekend availability is required. We estimate about 25 to 35 hours of work in total and may split the set between two engineers.
PROCESS
You sign an NDA before any files are shared. We will likely start with a short paid trial on one design, then release the rest. Hourly, with a not-to-exceed cap agreed up front.
YOU HAVE
- A mechanical engineering degree and 5+ years of machine design (PE a plus)
- Strong hand calculations for pins, shafts, bearings, gears and fasteners, plus FEA experience
- A CAD tool that opens STEP files and can check interference through motion (SolidWorks, Creo, NX, Inventor, Fusion or similar)
- Clear written English
PLEASE ANSWER IN YOUR PROPOSAL
1. A 10 mm steel clevis pin in double shear carries 8 kN. Is it adequate? Give your quick check and say what else you would check.
2. A 6204 deep-groove ball bearing (C about 13.5 kN) carries 2 kN radial and 1 kN axial at 300 rpm. Roughly what L10 life in hours do you expect, and is it fit for 10,000 hours?
3. Which hours (CT) can you work from Sat Nov 14 to Mon Nov 16, and how many hours in total? Which CAD and FEA tools will you use?

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