? This blow bar is one set of spare parts of impact crusher. There are many pieces of blow bars in impact crusher. PF-1010 impact crusher and PF-1210 impact crusher has four pieces of blow bars. PF-1214 has eight pieces of blow bars. There is a rotor in the working chamber of impact crusher. 

 

? Blow bar is installed on the rotor. It will hit the material when the rotor rotating. And then the material is thrown to impact plates. The blow bar is used for crushing material. So blow bar also belongs to quick wearing spare parts. It needs to be changed after some time usage. The frequency of replacing blow bar is decided by hardness of rock and also the usage time.