Specification Brand : Bestopper BulletPoint : Relays BulletPoint1 : Input shaft bore is 1/2" that can match the 12.7mm shaft motor (without key). The output shaft diameter is 16mm BulletPoint2 : The gearhead has nema 34 Input & output flange,suitable for flange 86mm stepper motor and other motors which can completely match the installation size . BulletPoint3 : 20:1 gear ratio ,the rated holding torque is 50N.m and the Max. holding torque is 80N.m BulletPoint4 : 4pcs screws provide for instalaltion , small size gearbox , very convenient for the machine which has limited space for a gearbox. BulletPoint5 : This nema34 planetary gearbox mainly matches the stepper motor to reduce speed and increase torque. Widely used in CNC field on mill,lathe,bench,packaging machine etc. CurrentRating : 8 amps ExternallyAssignedProductIdentifier : 9177508814697 IncludedComponents : gearbox body, 4pcs screw ItemName : 1/2" Planetary Gearbox 20:1 Nema 34 Gear Head 3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput, DHL/FedEx Ship (20:1) ItemPackageDimensions_Height : 20 centimeters ItemPackageDimensions_Length : 20 centimeters ItemPackageDimensions_Width : 20 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : mechanical-gearboxes Manufacturer : Bestopper MaximumSwitchingCurrent : 8 amps MaximumSwitchingVoltage : 12 volts ModelNumber : 86PX FBA NumberOfItems : 1 OperationMode : Automatic PartNumber : 86PX FBA ProductDescription : Specifications : Flange : Nema34 Input shaft: 12.7mm (1/2") Gear Ratio : 20:1 Output shaft: 16mm Stage: Stage I Body length(mm): 94 Specified load(N.m): 50 Max load(N.m): 80 Effectiveness(%): 90 Return clearance(Arcmin): Less than 25 Rated input speed(rpm): 2000 Protection grade(IP): 65 Weight(KG): 2.4 Noise(DB): Less than 60 Life(H): ≈20000 Lubrication way: grease Installation: flange Package Included : 1pc Gearbox 20:1 4pcs Screw ProductSiteLaunchDate : 2021-09-18T07:51:57.956Z Size : 20:1 Speed : 3000 rpm Style : Nema 34 SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 26111500