Nema 34 bipolar stepper motor for cnc router Homepage: www.Eaglecnctec.Com Features of nema 34 step motor model. 85bygh450a /86bygh450a Currency 4a Step angle 1.8â° Phase two Holding torque: 21kg/cm =2n.M = 285 oz-in Shaft diameter: 12.7 / 14mm Net weight: 2.4kg Features of bipolar stepping motor model. 85bygh450b /86bygh450b Currency: 5a Step angle: 1.8â° Phase: two Holding torque: 60kg/cm =5.88n.M =840 oz-in Shaft diameter: 12.7 / 14mm Net weight: 3.5kg -