Impact Crusher Spare Parts
Six core wear parts engineered for high-speed impact crushing. All parts are castings — blow bars, aprons, liners, and wedges.
For HSI and mobile impactors, send the blow bar drawing, rotor slot dimensions, feed material and preferred alloy to compare high-chrome, martensitic and ceramic composite options.
Impact Crusher Blow Bars / Impact Hammers
Impact Crusher Blow Bars / Impact Hammers — HSI impact crusher wear parts for Metso NP, Sandvik CI/QI, Hazemag, Kleemann and Rubble Master. OEM-compatible supply, custom casting and machining, material certificates included.
Custom-cast blow bars in Cr26 high-chrome white iron (50–60% carbide volume, HRC 58–62), Cr27Mo1 martensitic for hot hardness retention, or Ceramic-Tipped for extended service life on granite and basalt. Reversible 4-edge profile — rotate on schedule for more total life at zero additional cost.
- Material
- High Chrome / Martensitic / Ceramic Composite
- Hardness
- 550–650 HBW (High Chrome) / 58–62 HRC
Impact Crusher Apron Liners / Breaker Plates
Impact Crusher Apron Liners / Breaker Plates — HSI impact crusher wear parts for Metso NP, Sandvik CI/QI, Hazemag, Kleemann and Rubble Master. OEM-compatible supply, custom casting and machining, material certificates included.
The stationary striking surface in every impact crusher. Primary aprons cast in Mn18Cr2 (work-hardens under repeated strike); secondary/tertiary aprons in Cr26 or Cr27Mo1 (carbide-rich for abrasive feed). Top (coarse feed) — Mn18Cr2 castings. Secondary/tertiary (fine abrasive) — Cr26 or ceramic-tipped. Wedge-lock or bolt-on mounting. Monoblock and segmented designs available. Replace at scheduled 80% thickness.
- Material
- Mn18Cr2 / Cr26 / Ceramic-Tipped
- Hardness
- 220→500 HB / HRC 58–62
Impact Crusher Side Liners / Wear Plates
Impact Crusher Side Liners / Wear Plates — HSI impact crusher wear parts for Metso NP, Sandvik CI/QI, Hazemag, Kleemann and Rubble Master. OEM-compatible supply, custom casting and machining, material certificates included.
Chamber wall protection against edge bypass and high-velocity particle scouring. Side liners in HB400, Cr26, or Mn18Cr2. Protects the crusher housing from direct particle impact and abrasive wear. Bolt-on design for quick replacement. Available for left, right, and top positions. Replace when thickness drops below 50% of original.
- Material
- HB400 / Cr26 / Mn18Cr2
- Hardness
- HB 400 / HRC 58–62 / 200–500 HB
Impact Crusher Wedge Set / Locking Wedges
Impact Crusher Wedge Set / Locking Wedges — HSI impact crusher wear parts for Metso NP, Sandvik CI/QI, Hazemag, Kleemann and Rubble Master. OEM-compatible supply, custom casting and machining, material certificates included.
Secures blow bars to the rotor. A loose blow bar is a projectile — catastrophic failure. Always replace wedges during blow bar change-out — reusing worn wedges is the #1 cause of blow bar ejection. Precision-cast in high-strength alloy steel or ductile iron. Upper, lower, side, and complete wedge kits to match rotor slot geometry exactly.
- Material
- Alloy Steel / Ductile Iron
- Hardness
- HB 280–320 / HB 200–250
Impact Crusher Rotor Protection Plates
Impact Crusher Rotor Protection Plates — HSI impact crusher wear parts for Metso NP, Sandvik CI/QI, Hazemag, Kleemann and Rubble Master. OEM-compatible supply, custom casting and machining, material certificates included.
Guards the rotor body between blow bars. A protected rotor extends rotor life and lowers capital cost. Cast in Cr26 or HB500 for maximum abrasion resistance. Rotor protection plates sit between blow bars and deflect material away from the rotor body. Often overlooked in maintenance but critical for rotor longevity — a new rotor is significantly more expensive than protection plates.
- Material
- Cr26 / HB500
- Hardness
- HRC 58–62 / HB 500
Impact Crusher Feed Chute & Discharge Chute Liners
Impact Crusher Feed Chute & Discharge Chute Liners — HSI impact crusher wear parts for Metso NP, Sandvik CI/QI, Hazemag, Kleemann and Rubble Master. OEM-compatible supply, custom casting and machining, material certificates included.
Wear protection of material entry and exit points. The most overlooked wear item in impact crusher maintenance. Custom-fabricated wear liners in HB400, Cr26, or Hardox wear plate. Protects feed chute, discharge chute, and bypass areas from continuous material flow abrasion. Bolt-on replacement panels. Inspect at every blow bar change.
- Material
- HB400 / Hardox / Cr26 Overlay
- Hardness
- HB 400 (Hardox 400 equiv.)
Supported Crusher Brands & Models
Click a brand to see all supported models. Every part is reverse-engineered to OEM specifications.
Metso Full Range
NP Horizontal
Lokotrack Mobile
Nordberg Legacy
Sandvik Full Range
QI / Prisec
QH / QS
CV / VM
Kleemann Mobile Range
Mobirex MR Series
Mobirex Legacy
Powerscreen / Terex Full Range
Powerscreen Trakpactor
Terex Cedarapids
Hazemag Full Range
AP Series
APK / APS
Astec / KPI-JCI / Telsmith Full Range
KPI-JCI Andreas HSI
Astec / Telsmith
Shanbao & Chinese OEM Full Range
Shanbao PF Series
Yifan / SBM / NFLG
Zhongyu / Others
More International Brands 6+ Brands
BHS-Sonthofen
Terex Finlay
Tesab / Rubblemaster
Keestrack / Arja
Striker / McCloskey
Böhringer / ThyssenKrupp
Which Alloy for Your Application?
Impact crushers are abrasion-dominant. High-chrome white iron (Cr26) is the default — NOT manganese steel. Complete selection guide below.
Quick Alloy Picker
Find the right grade in 5 seconds.
Soft Limestone
Cr15
Application-dependent
General (Default)
Cr26
Application-dependent
Abrasive (Granite)
Cr27Mo1
Application-dependent
Extreme (Basalt)
Ceramic Composite
Application-dependent
A. Blow Bar Material Guide — The #1 Decision
| Feed Material | Recommended Grade | Cr% | Hardness | Carbide Vol. | Typical Life | Cost / Ton |
|---|---|---|---|---|---|---|
| Soft Limestone | Mn18Cr2 | 1.7–2.2 | 220–500–550 HB | N/A | Application-dependent | Low |
| Med. Limestone / Dolomite | Cr15 / Martensitic | 14–16 | HRC 52–56 | 15–20% | Application-dependent | Low |
| River Gravel / Round Stone | Cr26 | 25–28 | HRC 58–62 | 25–30% | Application-dependent | Medium |
| Granite / Diorite | Cr27Mo1 | 26–28 | HRC 60–63 | 28–33% | Application-dependent | High |
| Granite — max life | Ceramic Composite | 26–28 + inserts | HRC 60+ / 70+ | 30–35% | Application-dependent | Very High |
| Basalt / Quartzite | Cr27Mo1 / Ceramic | 26–28 | HRC 60–63 | 28–33% | Application-dependent | Very High |
| Recycled Concrete / C&D | Cr26 + Reinforced | 25–28 | HRC 58–62 | 25–30% | Application-dependent | Medium |
| Steel Slag / Hard Slag | TiC / Tungsten Carbide | N/A | HRC 65–70 | 35–45% | Application-dependent | Very High |
| Asphalt / Demo Debris | Cr26 / Cr27Mo1 | 25–28 | HRC 58–62 | 25–30% | Application-dependent | Medium |
| Iron Ore | Cr27Mo1 / Ceramic | 26–28 | HRC 60–63 | 28–33% | Application-dependent | High |
B. Apron & Liner Material Guide
| Part | Position | Recommended Grade | Hardness | Cost / Ton |
|---|---|---|---|---|
| Primary Apron (top) | Coarse feed | Mn18Cr2 | 220–500–550 | Low–Med |
| Secondary/Tertiary Apron | Fine abrasive | Cr26 / Cr27Mo1 | HRC 58–62 | Medium |
| Apron — extreme life | Any position | Ceramic-Tipped Cr26 | HRC 60+ | High |
| Side Liners | Chamber walls | HB400 / Mn18Cr2 | HB 400 / 500 | Low |
| Side Liners — abrasive | Chamber walls | Cr26 | HRC 58–62 | Medium |
| Rotor Protection Plates | Between bars | Cr26 / HB500 | HRC 58–62 / HB500 | Medium |
| Feed/Discharge Chute | Entry + exit | HB400 / Hardox | HB 400 | Low |
True Cost Per Ton Formula
A budget Cr15 blow bar set with frequent change-outs can cost more per ton than a premium Cr27Mo1 or ceramic composite set with extended service life. Always evaluate wear parts by total cost per ton, not by purchase price alone. Contact us with your specific application parameters for a tailored cost analysis.
Five Critical Material Rules for Impact Crushers
① High-chrome iron is the DEFAULT. High-chrome iron is the DEFAULT. Impact crushers are abrasion-dominant — material-to-bar contact is microseconds, too short for Mn steel work-hardening. Cr26 with 25–30% carbide volume provides significantly longer life than Mn18Cr2 in impact applications. Use Mn steel ONLY in primary impactors with feed >300mm.
② Cr15 vs Cr26 vs Cr27Mo1 — Mo pays back. Cr15 vs Cr26 vs Cr27Mo1 — Mo pays back. Molybdenum in Cr27Mo1 maintains hot hardness at operating temperature, extending service life in abrasive granite. Skip Cr15 entirely unless crushing only soft limestone.
③ Ceramic composite = 2\u20133\u00d7 life, but NOT for primary impact. Ceramic composite extends service life significantly, but NOT for primary impact. Ceramic inserts fail catastrophically under high impact (tramp iron or feed >200mm). Best ROI in tertiary crushing or recycling where feed is clean.
④ Blow bar rotation adds 30% life for free. Blow bar rotation adds life for free. Most blow bars are reversible (4 working edges). Operators who rotate on schedule get more total life at zero additional cost — pure operational discipline.
⑤ Apron gap check is critical. Every millimeter of gap increase above specification reduces reduction ratio. An oversized gap creates hidden energy and recirculation costs that compound over time.
Blow Bar Material Comparison
Cr15 (budget): Suitable only for soft limestone. Not recommended for abrasive materials due to low chromium content.
Cr26 (standard): The industry default for aggregates. Balanced wear resistance for most hard rock applications.
Cr27Mo1 (premium): Molybdenum addition improves hot hardness retention. Recommended for abrasive granite, basalt, or quartzite.
Ceramic Composite (max life): Best for clean, <150mm feed in secondary/tertiary crushing. NOT for primary impactors (tramp iron risk). Highest cost per bar, lowest cost per ton in suitable applications.
Why choose ZL Crusher Parts
Foundry-direct. No middleman.
30+ years casting experience. 18,000-ton annual capacity. Every part engineered, poured, heat-treated, machined, and QC-checked in our own Luoyang plant. No outsourcing, no sub-contracting. ISO 9001:2015.
9-step QC. Full traceability.
Spectrometer → metallurgical microscope → impact tester → tensile machine → hardness tester → 3D scanner → ultrasonic → magnetic particle → portable spectrometer. Every inspection report ships with your order.
Global. Trusted by industry leaders.
Exported to 37+ countries across four global regions. Supplying CEMEX, LafargeHolcim, Heidelberg Cement, TATA Steel and POSCO. Official Hardox® Wear Parts Center since 2017.
Frequently Asked Questions
Common questions about impact crusher blow bars, aprons, and material selection.
Cr15, Cr26, or Cr27Mo1 — which blow bar material do I need?
How often should I rotate my blow bars?
Can you match non-standard blow bar profiles?
What information do I need to provide for a blow bar quote?
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