rack-pinion PASS

Rack and pinion on a base plate from sources/rack-pinion-spec.md (the only source, text, authoritative): three separate solids with no fused bodies. A 240 x 80 x 5 base plate carries a 20-tooth module-2 involute spur pinion (pitch radius 20, face 8, D6 bore) on a revolute joint about +z at the origin and a 32-tooth module-2 straight-flank rack (200 long, 8 thick) on a slider joint along +x with it

clip play base (modelled) pinion (modelled) rack (modelled)

gates

[A] parts_pass	PASS
[A] bom_complete	PASS
[A] joint_fidelity	PASS
[A] clearances	PASS
[A] motion_clear	PASS
[A] fluid_domain	n/a
[B] export_agreement	PASS
[B] performance	PASS
[B] conservation	n/a
[B] refinement	n/a
[C] source_hygiene	PASS
[C] boundaries_complete	n/a
[C] provenance	PASS
[C] evidence_separation	PASS

observables

id	status	value ± u_numerical	mesh-resolved	case
rackRatio	ok	0.34907 mm/deg	-
rackTravel	ok	125.66 mm	-

A value its mesh ladder does not resolve is not evidence of performance; report.md gives each prediction's validation basis.