This Dayton 4RP21 60:1 Reducer / Chain / Sprocket w/ Gast 6AM-NRV-63 4 HP Air Motor is in used condition and is guaranteed to function 100%. This item came from a local MFG that was upgrading equipment.. We can accept pay pal or your credit card. Please feel free to contact us with any questions. As Seen in photos, the Dayton Reducer is equipped with a 4 5/8" 18 teeth roller chain sprocket. Last photo shows a HKK 60 Roller Chain approximately 36" in length. Dayton 4RP21 Speed Reducer Technical Specs ItemSpeed Reducer Speed Reducer TypeC-Face Shaft OrientationRight Angle DutyStandard Input RPM1750 Nominal Output RPM29 Worm Center Distance2.37" Bore Dia.5/8" Frame56C Overhung Load845 lb. Nominal Ratio60:1 Max. Input HP0.5 Max. Output Torque663 in.-lb. Output Torque @ 1/40 HP3600 Output Torque @ 1/3 HP297 in.-lb. Output Torque @ 1/2 HP419 in.-lb. Output Torque @ 3/4 HP663 in.-lb. Number of Stages1 RotationForward/Reversible MountingAny Position Except Input Motor Shaft Up LubricationKlubersynth UH1 6-460 Seal TypeDouble Lip BearingsBall Pinion MaterialHardened Steel Gear TypeWorm Gear MaterialHardened and Ground Steel Worm Gear MaterialBronze Housing MaterialCast Iron FinishPowdered Epoxy Paint Single/Double OutputLeft Single Output Solid/Hollow Output ShaftSolid Output Shaft Dia.1-1/8" StandardsAGMA Gast 6AM-NRV-63 Air Motor Technical Specs ItemAir Motor HP4 Running Torque @ Max. Pressure84 in.-lb. Max. Air Flow128 cfm Max. RPM3000 Shaft Dia.5/8" Shaft Length2.06" MountingC Face Port Size1/2" NPT RotationREV Housing MaterialCast Iron (description exceeds maximum possible length)