Nema17 face mount
hard tier · create
The request
Make a face-mount plate for a NEMA 17 stepper motor. A 60 mm square plate, 5 mm thick, lying flat in the XY plane and centred on the origin with Z up. Cut a 22.4 mm through-hole at the centre for the motor's pilot boss, and four 3.4 mm through-holes on the motor's 31 mm square bolt pattern, at X = ±15.5 and Y = ±15.5. Name the sub-part exactly `plate`.
What the AI judge checks
- A flat square plate of uniform thickness
- One large round hole at the centre of the plate
- Four small round holes arranged on a square around the centre hole
- The four holes are symmetric about both centre lines of the plate
- Nothing on the plate beyond the five holes
Measured checks
- one sub-part named plate (gate)
- plate is 60 × 60 × 5
- pilot bore is 22.4 mm
- bolt hole at (15.5, 15.5) is 3.4 mm (gate)
- bolt hole at (15.5, -15.5) is 3.4 mm (gate)
- bolt hole at (-15.5, 15.5) is 3.4 mm (gate)
- bolt hole at (-15.5, -15.5) is 3.4 mm (gate)
Ranked by hand
One reviewer put one attempt from each model in order, best first, ties left tied.
- #1 tieGemini 3.8 Flash

- #1 tieDeepSeek V4.1 Flash

- #1 tieGPT-6 Luna

- #1 tieGPT-6 Sol

- #1 tieOpus 5.5

- #6Kimi K3 (Moonshot)
not acceptable
Parts marked not acceptable fall below the reviewer's acceptable line whatever their order. Ordering by hand decides Human rank and Human rate on the leaderboard; it never affects Overall or Strict.
Every model's attempts
This is an older run. See the current results.
Run hard-baseline-2026-09-232026-09-23commit 6edf19e0spend $212.67 + $43.09 AI judging, 15 unpricedstopped early (interrupted)Other runs: 2026-10-16T18-49-10-hard-compact-2026-10-16, 2026-09-10T19-44-23-baseline-2026-09, 2026-09-04T20-02-10-stage2-hard-cases, 2026-09-04T19-48-31-screen-14-fixed