Vortex X237-50-56C-R Worm Gear Reducer - 50:1 Ratio, 56C NEMA Frame AX The D&D Global 100T5/660R is

The D&D Global 100T5/660R is a synchronous timing belt with T5-pitch profile

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so a 3/8VK2240 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

Vortex X237-50-56C-R Worm Gear Reducer - 50:1 Ratio, 56C NEMA Frame AX The D&D Global 100T5/660R isThe Vortex X237 50 56C R is a worm gear speed reducer with a 50: 1 nominal ratio (exact ratio 50. 0: 1), 2. 375 inch center distance, and NEMA 56C input flange. Output is a solid 1. 125 inch shaft with a 1 4x1 8 keyway, oriented for right hand output. Specifications Specification Value Part Number Vortex X237 50 56C R Series Vortex X Series Nominal Ratio 50: 1 Exact Ratio 50. 0: 1 Center Distance 2. 375" NEMA Input Frame 56C Output Orientation Right