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Leroy-Somer gearboxes: families, models & sourcing | Replacement Intelligence

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Leroy-Somer

Nidec Leroy-Somer drive-system brand. This catalog preserves exact legacy NXT reducer designations where Falk / Rexnord interchange literature publishes dimensional replacement mappings. Installed ratio, motor speed and mounting still require verification.

1 verified families6 source-backed model records0 verified sourcing channels

Manufacturer data checkedSep 23, 2026Primary source ↗Manufacturer site ↗

Product families1 verified

NXTlegacy helical gear drive

Evidence typedimensional interchangePublished mappingFalk Ultramite base-mounted helical size

6model records

Before replacing a Leroy-Somer unitField checklist

01Exact model / typeCapture the full nameplate designation, including suffixes.02Ratio or output speedDo not assume two same-size housings use the same reduction.03Mounting positionOrientation can change lubrication and usable configuration.04Shaft / hollow boreRecord diameter, key, shrink disc, bushing, and output side.05Motor interfaceCapture IEC/NEMA frame, adapter, power, brake, and encoder details.06Application dutyLoad, starts/hour, ambient conditions, washdown, and hazardous-area requirements matter.

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