Hammer head is the key part of crusher, and is also the wearing part. So it is important to choose the high quality and suitable hammer head. At present, the hammer head is classified by different size and material, which should be chosen according to the specific situation.
1. Choose big hammer head with the weight of 50-125kg for the large size crusher of the feed size above 40mm. Due to strong impact force, the high toughness ultrahigh manganese alloy steel and alloying high manganese steel are applied to reduce attrition.
2. Choose the hammer head with the weight less than 50kg for small and medium size crusher of the feed size less than 200mm. Because of small impact force, and the processing hardening capacity of ordinary high manganese steel is insufficient, the wear resistance is bad. It's better to use alloying high manganese steel with high carbon content or low and medium carbon alloy steel.
3. Choose the hammer head with the weight less than 15kg for small size crusher with the feed size below 50mm. It is suggested to choose medium alloy steel of medium carbon content, and more suitable to choose the hammer of which the top was made from high chromium cast iron and handle was made of 35# steel or the bimetal casting hammer head of low alloy steel.
4. Choose high toughness ultrahigh chromium cast iron to make hammer head for the fine crusher with feed size below 100mm. This kind of hammer head has high hardness, strong impacting toughness, so the service life is 3-5 times than the high manganese steel.