DIN 5480 / SAE Involute Spline Shaft & Hub Fit Reconstructor

Deterministic DIN 5480 / ISO 4156 side-fit tooth thickness tolerance & exact involute over-two-pins dimension M engine (.step, .dxf) built for Mitutoyo, Sodick, Rexroth, Parker — zero-upload ephemeral Wasm RAM execution.

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