gearbox spur gear ring material: AISI4140, 34CrNiMo6, 40CrNiMoA Dia: 1860mm Modulus: ... ring used on ball mill, sugar mill, rotary kiln and gearbox, reducer.we are a professional machinery manufacturer. we bring customized ... standard bearing, special bearings, gear, large gear, sprocket, tire, hollow shaft and many other heat treatment products. Big Gear Ring Used ...