About this part
Crusher wear parts include hammers for hammer mills, conical picks for sizers, roll segments for double-roll crushers, breaker bars and impact plates for impact crushers, and tramp-iron protection liners. Wear part life is highly dependent on coal abrasiveness, contamination by rock and tramp material, and operating parameters such as rotor speed and feed rate. Wear parts are commodity-replaceable items, but the choice of grade and supplier significantly affects cost per ton crushed.
Compatible Equipment
Material Options
- Manganese steel (Mn14/Mn18)
- Work-hardening manganese steel. Standard choice for hammer mills and breaker bars on coal duty.
- Martensitic alloy
- Cr-Mo alloy steels, harder than manganese but less ductile. Used where wear dominates over impact.
- Tungsten carbide insert
- Carbide-tipped picks for sizers; excellent wear life on abrasive feed.
- Chromium white iron
- High-chromium white iron for impact plates in low-impact, high-wear service.
Technical Specifications
| Specification | Value | Unit |
|---|---|---|
| Part Types | Hammers, sizer picks, roll segments, breaker bars, impact plates | |
| Hardness | 200–600 | HB |
| Weight per piece | 5–250 | kg |
| Standard | Match parent equipment OEM drawing |
Wear Factors
- Feed abrasiveness (silica content, rock contamination)
- Rotor or roll speed
- Feed top size
- Moisture content
- Tramp metal frequency
Replacement Notes
Wear parts are replaced on observed wear progression or on a planned interval matched to maintenance shutdowns. Operators commonly track tons crushed per set of wear parts to compare suppliers and grades. Catastrophic failure of a single hammer or pick can damage other parts and the rotor itself, so partial sets are usually replaced together.