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Wear Parts: The Ongoing Cost of Crushing
Wear parts are the single largest operating cost for any crushing operation after fuel. Understanding what parts wear, how quickly they wear, and what materials to choose can save thousands of dollars per year.
Jaw Crusher Wear Parts
Jaw Plates (Fixed and Swing)
The primary wear components in a jaw crusher. Material is crushed between the fixed jaw plate and the moving (swing) jaw plate.
| Material | Hardness (BHN) | Life (Hours) | Cost per Set | Best For |
|---|---|---|---|---|
| Standard Manganese (14%) | 200 | 500 – 1,000 | $6,000 – $12,000 | General aggregate, limestone |
| High Manganese (18-22%) | 220 | 800 – 1,500 | $8,000 – $16,000 | Hard rock, granite, basalt |
| Manganese + Chrome | 250+ | 1,000 – 2,000 | $12,000 – $25,000 | Highly abrasive material, quartzite |
When to replace: Jaw plates should be replaced when worn to approximately 50% of original thickness. Running plates beyond this point reduces crushing efficiency and can damage the jaw die seats.
Pro tip: Flip jaw plates halfway through their life. The bottom of the plate wears faster than the top. Flipping extends total life by 20-30%.
Toggle Plate and Cheek Plates
Toggle plates are a sacrificial safety component — designed to break before the jaw frame if uncrushable material enters the chamber (steel, tramp iron). Cheek plates protect the side frames from wear.
- Toggle plate cost: $500 – $2,000
- Cheek plate cost: $1,500 – $5,000 per set
- Replacement interval: Toggle plates as needed (after tramp events), cheek plates every 2-3 jaw plate changes
Impact Crusher Wear Parts
Blow Bars
The hammers that spin on the rotor and strike material. Blow bars wear faster than any other crusher component.
| Material | Life (Hours) | Cost per Set | Best For |
|---|---|---|---|
| High Chrome (26-28%) | 200 – 600 | $4,000 – $10,000 | Limestone, soft rock, recycling |
| Martensitic Steel | 150 – 400 | $3,000 – $7,000 | Budget option, soft material only |
| Ceramic Insert | 400 – 1,000 | $8,000 – $18,000 | Abrasive material, high-volume operations |
When to replace: Blow bars should be rotated (180°) when one side is worn, then replaced when both sides are worn. Never run with unevenly worn blow bars — it creates dangerous rotor imbalance.
Impact Curtains/Aprons
The stationary plates that material rebounds against after being struck by blow bars. Cost: $2,000 – $6,000 per set. Replace when worn through or cracked.
Cone Crusher Wear Parts
Mantle and Concave (Bowl Liner)
The mantle is the rotating inner wear surface; the concave is the stationary outer liner. Together they form the crushing chamber.
| Component | Life (Hours) | Cost |
|---|---|---|
| Mantle | 1,000 – 3,000 | $5,000 – $15,000 |
| Concave (bowl liner) | 1,500 – 4,000 | $8,000 – $20,000 |
When to replace: When the crushing chamber profile is worn beyond the point of producing the desired product size. Running worn liners wastes fuel and produces excess fines.
Reducing Wear Part Costs
- Remove tramp material before the crusher — Metal detectors and scalping screeners protect wear parts from accelerated damage.
- Run the crusher at proper CSS — Running tighter than necessary accelerates wear without proportionally increasing production.
- Keep the crushing chamber full — Rock-on-rock crushing (choke feeding) distributes wear evenly. Trickle feeding concentrates wear at the bottom of the chamber.
- Buy from reputable suppliers — Cheap aftermarket wear parts may save 30% upfront but wear 50% faster. OEM or quality aftermarket (Bogvik, H&L, Columbia Steel) is usually the best value.
Browse crushers for sale — our listings include wear part condition in the equipment descriptions.
