Crusher Hammer Installation Guide : Comparison of 3 Mainstream Fixing Methods, Avoiding Pitfalls and Choosing the Right One for Durability
Publish：
2025-10-09 14:02
发布人：
清水源
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In the operating system of crushing equipment, the hammerhead is a core wear-resistant component. Its installation method directly affects the equipment's operational stability, and detailed maintenance determines its service life and production efficiency. In actual operations, many companies often encounter loose hammerheads and rotor vibration due to improper installation methods, or equipment failures caused by neglecting wear inspections. Today's technical blog focuses on comparing the main installation methods for crusher hammerheads , drawing on industry practical experience to provide practical operational guidelines for equipment operators and maintenance personnel.
Currently, the main methods for fixing crusher hammer heads on the market include screws, movable plates, and wedges (including hydraulically modified versions). These methods vary significantly in terms of safety, assembly and disassembly efficiency, and applicable operating conditions. Choosing the wrong fixing method can lead to equipment hazards. The hammer head is a core wear-resistant component of crushing equipment, and the mounting method directly affects operational stability. The following briefly summarizes the three main fixing methods and key selection criteria：
1. Screw fixation: phased out
- Principle : Bolts fix the hammer head and rotor hammer seat, relying on threaded fastening.
- Disadvantages : Screws are exposed and easily damaged, and they are easy to break when sheared, which poses a high safety risk. It is only suitable for small and low-load equipment and has been abandoned by large manufacturers.
- Reminder : Old equipment needs to be checked for tightness every week, equipped with anti-loosening nuts, and bolts replaced every 3 months.
2. Movable plate fixation method: Use with caution
- Principle : The hammer head and pressure plate are inserted into the rotor slot, and the pressure plates at both ends are welded to prevent axial movement.
- Advantages and disadvantages : simple structure and easy installation, but the pressure plate is easily damaged and needs to be replaced frequently. Incomplete welding can easily lead to loose hammer heads and uneven particle size.
- Applicable : Only temporarily used for crushing low-hardness, low-abrasive materials. Not recommended in high-load scenarios.
3. Wedge fixation: the current mainstream
- Traditional type : The wedge is embedded in the hammer head and the rotor hammer seat, and the centrifugal force helps tighten. It is safe, fast to disassemble and assemble, and has a wide range of adaptability. However, the bolt auxiliary is prone to damage to the thread due to vibration.
- Hydraulic type : The cylinder plunger replaces the bolts, with controllable pressure and uniform tightening. The efficiency of hammer head replacement is doubled and the cost is low. It is the first choice for large-scale high-load production lines.
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