... accepted 5ISO9001:2008 certificate Powder metallurgy sintered cheap bearings manufacturer for garden tools Features: 1High density and good strength2Good ... , synchromesh gear hub, pressure side plate, striking fork, hydraulic valve pushrod seat, oil pump rotor, oil pump gear, ... copper steel, copper molybdenum steel, alloy.4. Production equipment:a. Hydraulic press with 200T, 160T, 100T, 60T, 50T, 25T, ...