The GWS-8 metal wire repeated bending testing machine is manually operated. It is a device for performing left and right repeated bending tests on metal wires with a diameter of Ф3-Ф8mm. It is used to test the performance and display of plastic deformation of metal wires when subjected to repeated bending. Defects are mainly suitable for industrial and mining enterprises, iron and steel metallurgy, quality supervision and other departments that have a small inspection workload. It complies with the national standard "GB/T238-2002 Test Method for Repeated Bending of Metal Material Wire Rods".