The crusher hammer is the key wear part of a hammer crusher — the rotating element that shatters limestone, clinker, and other brittle materials by high-speed impact. LIMING manufactures crusher hammers in three advanced materials, each optimized for different feed conditions and wear mechanisms.
In a hammer crusher, a series of hammers are mounted on the rotating rotor. As material enters the crushing chamber, the rapidly spinning hammers strike it with high kinetic energy, shattering it against the impact plates and grate bars. The crushed material exits through the grate openings at the bottom. Because the hammers directly contact the abrasive feed material at high velocity, they wear rapidly and require frequent replacement.
Crusher hammer performance directly impacts plant productivity, energy consumption, and operating cost. Worn hammers reduce crushing efficiency, increase power draw, and produce inconsistent product size. Selecting the right hammer material for your specific application can double or triple service life while maintaining optimal crushing performance.
LIMING offers three hammer material technologies — high manganese steel, bi-metallic composite, and high chrome cast iron — covering the full range of cement plant crushing applications from primary limestone to clinker and slag. We manufacture hammers for all major hammer crusher and impact crusher models, custom-produced to your drawings or reverse-engineered from samples.
Each hammer material has distinct advantages. The optimal choice depends on feed material hardness, abrasiveness, feed size, and rotor speed:
| Material Type | Hardness (HRC) | Impact Toughness | Wear Resistance | Best For |
|---|---|---|---|---|
| High Manganese Steel (Mn13/Mn13Cr2) | 22-28 (work-hardens to 50+) | Excellent | Good (improves with work-hardening) | Large feed, high impact, medium abrasion |
| Bi-Metallic Composite | 55-62 (tip) / 35-40 (shank) | Very Good | Excellent | Best balance — tough shank + hard tip |
| High Chrome Cast Iron (Cr26/Cr20) | 58-65 | Moderate | Outstanding | Fine feed, high abrasion, lower impact |
LIMING's bi-metallic crusher hammers represent the most advanced wear part technology for cement crushing. The hammer is manufactured in two parts:
The two metals are metallurgically bonded during casting, creating a hammer that combines the wear resistance of high chrome with the toughness of alloy steel. This design typically delivers 2-3 times the service life of standard manganese steel hammers in moderate to highly abrasive applications.
Advanced metallurgy, bi-metallic expertise, and proven field performance.
Proven dual-metal casting technology produces a strong metallurgical bond between the hard tip and tough shank.
Every heat is tested for chemical composition, hardness, and impact toughness before release.
Hammers matched to your rotor's weight specification to maintain balance and prevent vibration.
Bi-metallic and high chrome hammers significantly outperform standard Mn steel in abrasive service.
| Parameter | Specification |
|---|---|
| Product Type | Crusher hammer / hammer head for hammer crusher |
| Material Options | High Mn steel, Bi-metallic composite, High chrome cast iron |
| High Mn Steel Grades | Mn13, Mn13Cr2 |
| Bi-Metallic Grades | Tip: Cr26 (HRC 58-65) / Shank: alloy steel (HRC 35-40) |
| High Chrome Grades | Cr20, Cr26 (HRC 58-65) |
| Weight Range | 2 kg – 120 kg per hammer (custom) |
| Manufacturing | Sand casting / lost-foam casting → heat treatment → machining |
| Heat Treatment | Water toughening (Mn steel) / Quench + temper (high chrome, bi-metallic) |
| Surface Treatment | Hardfacing overlay available on request |
| Compatible Crushers | PC, PCK, PCF series and equivalent hammer crushers |
| Lead Time | 15-30 days (depending on material and quantity) |
Each material type follows a specialized production route optimized for its metallurgical characteristics.
Custom patterns produced. Sand or lost-foam casting — bi-metallic hammers cast in two pours for tip and shank.
Mn steel: water toughening at 1050°C. High chrome & bi-metallic: quench and temper for maximum hardness.
Drilling of mounting holes and finishing of contact surfaces. Critical dimensions verified by CMM.
Optional wear-resistant welding overlay applied to high-wear zones for extended service life.
Hardness testing at multiple points, impact testing, dimensional check, and weight sorting for rotor balance.