Marathon GD&T
Apply GD&T to a STEP part
Upload a STEP file, optionally set datums and tolerances, and we fill any blanks with Qwen. Separate from the 2D TechDraw dimension pipeline.
Drop STEP / STP here
or click to browse · max 100 MB
For multi-body STEP: which solid to annotate
Tolerances & datums
Leave blank to let Qwen suggest values. Your values override AI when set.
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