... ~300mm 2, Bending angle: 90-180 3, Application:aluminum alloy rail bending Dongguan RiDong Ultrasonic Machinery Co., Ltd is a ... Rail Bender This machine is mainly used to bend aluminum alloy window curtains rails. Characters: 1, PLC controller, automatic running ... bend aluminum automatically. 3, Smooth radian. 4, Saved labor and material costs. Technical Parameter: Voltage: 380/220V 50/60HzPower: 4. ...