Caterpillar excavator sprocket 1.material:45Mn 2.surface quenching:HRC47~52 3.hardening depth:top 11~13,bottom 4~6 Supply caterpillar excavator sprocket,such as for E200B,CAT320,CAT330,CAT215,CAT325.etc.Xiamen EBpart Manufacturing Co.,Ltd is professional undercarriage parts manufacturer in China,Our products for earthmoving heavy machinery are at good price with high quality! Our excavator ...