OCCT (Open-Cascade-SAS)MCADConfidence: Medium

On long helical thread flanks, intersection tolerance grew from 3e-6 to 1.45e-4, cutting a threaded cylinder failed at 7 of 12 phases, and two more phases returned a valid solid about 60 mm3 too heavy.

Impact Analysis

Persona

Mechanical Designer

Team Size Impact

5x Multiplier

Prototype Delay

3 Days

Est. Annual Cost

$30,000

1 user · 1 month240 min
Rest of team960 min
Rest of year13,200 min

monthly_minutes × 12 × team_multiplier ÷ 60 × $75/hr = $30k/yr

$75/hr assumed rate.

Annual team-minutes decomposed from the reported monthly inputs.

Evidence & Sources

1 Sources

Open-Cascade-SAS/OCCT Issue #1671: IntWalk_PWalking's step is relative to the face's parameter range, so sections on long helical faces lose accuracy and booleans go wrong

github.com

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Analyst Notes

From the Grok pain-radar digest, Oct 24-25 2026 (Oct 24 evening to Oct 25 morning slots). Verified live 2026-10-25: issue/PR read on GitHub; title and state confirmed.