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Manufacturer dimensional interchange
Falk / Rexnord 207UC appears in the same manufacturer-published cross-reference row as SEW-EURODRIVE R77 at Verify installed ratio / motor speed · Ultramite UC.
Falk/Rexnord publishes 207UC in the 281-810 Ultramite dimensional interchange guide beside the listed SEW models. Rexnord instructs users to verify motor speed, ratio, mounting position, and current catalog ratings/dimensions before interchange.
The manufacturer publishes the two models in a dimensional-interchange table or equivalent dimensional comparison.
SEW-EURODRIVE R77 and Falk / Rexnord 207UC are tied by the published source at Verify installed ratio / motor speed · Ultramite UC.
Dimensional alignment does not by itself prove identical torque, thermal rating, service factor, ratio, accessories, or application suitability.