1.the cracker have passed iso9001 certificate,the quality of our machine can be assured. 2.The machine is applicable for cracking scrap rubber. Feature: 1.Being made of cold hard alloy castiron, the roll wears well.The rolls have 3 types:Double-channeled roll, single-channeled roll and double-smooth roll 2.The safety shut-down in manual operation is set, with the function of automatic or crawl back swig the roll 3.Convenient range adjustment is set in manually operation.The whole machine adopts hannel bottom head for convenient carrying and maintenance. main technial data: Type