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-LubricatedYesRatio400:1Max Input HP1/6Fan CooledNoUnit Of Measure ShowEnglishOutput RPM @17504.4Output Shaft StyleHollow O/PProduct Family800BR SERIESExact Gear Ratio381.111Product DescriptionSF843BR-T/R RED 400:1 Ratio, No Base, "H" ASSYRated Efficiency71%BaseNo BaseMax Output Torque Cap1647Input Frame SizeB5-56CInput StyleQuillReduction StagesTripleWeight39Motor HP0.16Recommended LubricationKlubersynth UH1 6-460Family Id30,315AGMA Service ClassIOutput Shaft O.D./Bore Size1.25