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-LubricatedYesRatio500:1Max Input HP0.13Fan CooledNoUnit Of Measure ShowEnglishOutput RPM @17503.5Output Shaft StyleHollow O/PProduct Family800BR SERIESExact Gear Ratio490Product DescriptionS833BR-T/R RED 500:1 Ratio, No Base, "H" ASSYRated Efficiency58%BaseNo BaseMax Output Torque Cap1354Input Frame SizeNoneInput StyleShaft InputReduction StagesTripleWeight32Motor HP0.16Recommended LubricationKlubersynth UH1 6-460Family Id30,314AGMA Service ClassIOutput Shaft O.D./Bore Size0.75