Boston Gear 800BR Series helical worm gear drives are heavy duty helical gear drives with long life performance features and simplified maintenance. The 800BR Series comes in double and triple reduction ratios from 8:1 through 900:1 and a maximum 10HP rating. As always, the 800BR Series is available via Reducer Express.Pre-LubricatedYesRatio100:1Max Input HP1.22Fan CooledNoUnit Of Measure ShowEnglishOutput RPM @175017.0Output Shaft StyleHollow O/PProduct Family800BR SERIESExact Gear Ratio100.551Product DescriptionS853BR-T/R RED 100:1 Ratio, No Base, "H" ASSYRated Efficiency79%BaseNo BaseMax Output Torque Cap3477Input Frame SizeNoneInput StyleShaft InputReduction StagesTripleWeight47Motor HP1Recommended LubricationKlubersynth UH1 6-460Family Id30,314AGMA Service ClassIOutput Shaft O.D./Bore Size1.375