... metallurgy of iron and steel products for hardware tools Features: 1High density and good strength2Good ... , Helical Gears, Bevel gears, Double Gears, Spur gear, Curved gear, Rack gear, Circular gear, Driving & ... absorber parts, synchromesh gear hub, pressure side plate, striking fork, hydraulic valve pushrod seat ... and smoothly coefficient of friction and without stick-slip effects 5Suitable for dirt, ...