Vortex XS154-50-R Worm Gear Reducer - 50:1 Ratio, Belt-Drive Input Spur Gear com/products/gates-xpz1180-metric-power-v-belt"

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so the 18/D255 interchanges with Gates 18/D255

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What does the Vortex XS133-20-R replace

Vortex XS154-50-R Worm Gear Reducer - 50:1 Ratio, Belt-Drive Input Spur Gear com/products/gates-xpz1180-metric-power-v-belt"The Vortex XS154 50 R is a worm gear speed reducer with a 50: 1 nominal ratio (exact ratio 50. 0: 1) and 1. 54 inch center distance, configured for belt or chain drive on the input side. The 0. 625 inch input shaft and 0. 75 inch output shaft both have keyways for sheaves and couplings. Output is oriented for right hand output. Specifications Specification Value Part Number Vortex XS154 50 R Series Vortex XS Series Nominal Ratio 50: 1 Exact Ratio 50.