Vortex VR48-5-180TC Inline Helical Speed Reducer - 5:1 Ratio, 180TC NEMA Frame QD-E v=1698971677"

v=1698971677"

so a 12/C124 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

Cross-references: Browning 3TB154

16T5/2150US has a 5 mm tooth pitch

Vortex VR48-5-180TC Inline Helical Speed Reducer - 5:1 Ratio, 180TC NEMA Frame QD-E v=1698971677"The Vortex VR48 5 180TC is a NEMA C face mounted inline helical speed reducer with a 5: 1 nominal ratio (actual ratio 4. 85: 1) and a 180TC NEMA input flange. The input and output shafts are coaxial (in line with each other), which makes this the right Vortex unit for applications where a standard NEMA C face motor drives a single coaxial output shaft: belt and roller conveyors, packaging machinery, mixers, blowers, and OEM machinery. The VR48 is