Get current pricing for Ratio, RATIO-23676-ID Ratio = 21.35. Service Rating H.r. = 40. 2 3/8 Dia. Input Shaft. 3 3/16 Dia. Output Shaft. Model 7c2-06b8. M.o.# D7453963. Input Rpm = 1750. Output . Product Category: Process Equipment, Sub Category: Power Generation: