Hammer Shaft / Rotor Shaft
Crusher Main Shaft Assembly — Hammer Crusher Shaft / Impact Crusher Rotor Shaft / VSI Main Shaft — 42CrMo / 40CrNiMo / 34CrNiMo6 / 4140 / 4340
Hammer Shaft / Rotor Shaft Material Specifications
Alloy steel shaft grades, manufacturing process, and quality control for hammer crusher and impact crusher main shafts
| Parameter | 42CrMo (4140) | 40CrNiMo (4340) | 34CrNiMo6 | 40CrMnMo | 35CrMo |
|---|---|---|---|---|---|
| Standard | GB/T 3077 / AISI 4140 | GB/T 3077 / AISI 4340 | EN 10083-3 / DIN 1.6582 | GB/T 3077 | GB/T 3077 / AISI 4135 |
| C (%) | 0.38 – 0.45 | 0.37 – 0.44 | 0.30 – 0.38 | 0.37 – 0.45 | 0.32 – 0.40 |
| Cr (%) | 0.90 – 1.20 | 0.60 – 0.95 | 1.30 – 1.70 | 0.90 – 1.20 | 0.80 – 1.10 |
| Mo (%) | 0.15 – 0.25 | 0.20 – 0.30 | 0.15 – 0.30 | 0.20 – 0.30 | 0.15 – 0.25 |
| Ni (%) | — | 1.25 – 1.75 | 1.30 – 1.70 | — | — |
| Tensile Strength Rm | ≥ 900 MPa | ≥ 980 MPa | ≥ 1000 MPa | ≥ 930 MPa | ≥ 750 MPa |
| Yield Strength Rp0.2 | ≥ 700 MPa | ≥ 835 MPa | ≥ 800 MPa | ≥ 735 MPa | ≥ 550 MPa |
| Fatigue Strength (Rotating Bend, 10^7 cycles) | ≥ 420 MPa | ≥ 470 MPa | ≥ 480 MPa | ≥ 440 MPa | ≥ 350 MPa |
| Impact Toughness Akv (20°C) | ≥ 45 J | ≥ 55 J | ≥ 60 J | ≥ 40 J | ≥ 40 J |
| Surface Hardness | HB 260 – 310 (HRC 27-33) | HB 280 – 330 (HRC 29-35) | HB 290 – 340 (HRC 30-36) | HB 270 – 320 (HRC 28-34) | HB 240 – 290 (HRC 24-30) |
| Forging Ratio | ≥ 3:1 | ≥ 3:1 | ≥ 3.5:1 | ≥ 3:1 | ≥ 3:1 |
| Heat Treatment | Q+T (850°C oil + 580°C) | Q+T (840°C oil + 560°C) | Q+T (850°C oil + 580°C) | Q+T (860°C oil + 600°C) | Q+T (850°C oil + 560°C) |
| Max Shaft Diameter | Up to 300 mm | Up to 400 mm | Up to 500 mm | Up to 350 mm | Up to 200 mm |
| Best For | Standard hammer crusher, medium duty | Heavy-duty impact crusher, high shock | Large hammer crusher, extreme duty, low-temp | Impact crusher, medium-large, moderate budget | Small crusher shaft, light duty, budget option |
Quick Shaft Material Selection Guide
| Your Application | Recommended Grade | Reason |
|---|---|---|
| Small hammer crusher (<500 kW), intermittent duty | 35CrMo | Cost-effective for light-duty shafts; suitable for small hammer crushers with moderate shock loads |
| Standard hammer / impact crusher (500-1500 kW), continuous duty | 42CrMo | Industry standard for crusher shafts; excellent balance of strength, toughness, and cost for normal conditions |
| Large impact crusher (1200-2000 kW), high shock loading | 40CrNiMo | Ni addition provides superior impact toughness at large diameters; resists brittle fracture under peak shock |
| Extreme-duty hammer crusher (2000-4000 kW), low-temperature operation | 34CrNiMo6 | Maximum fatigue strength + low-temperature toughness; premium European standard for largest hammer crushers |
| Medium-large impact crusher, moderate budget, 800-1500 kW | 40CrMnMo | Balanced alternative with higher Mn for hardenability; good cost-performance for mid-range crushers |
Certifications & Authorizations
Quality you can verify. Partners you can trust.
Custom OEM / ODM
From drawing to delivery — one-stop customization, no minimum order
Send Drawing
Upload your technical drawing (PDF, DWG, STEP, IGES) or share sample photos with dimensions
Engineering Review
Material recommendation, casting process design, DFM analysis — free quotation within 24 hours
Sampling & Test
Prototype production with full inspection: hardness test, spectrometer, dimensional check
Production & Ship
ISO 9001 certified. 15-25 days standard lead time. Global shipping with full documentation
Frequently Asked Questions
Quick answers to common questions about our crusher wear parts
We offer four material families tailored to different working conditions:
| Material Series | Grades | Hardness | Best For |
|---|---|---|---|
| High Manganese Steel | Mn13, Mn13Cr2, Mn18Cr2 | HB 200-260 (work-hardens to HB 400-600) | Medium to high impact crushing |
| High Chromium Cast Iron | Cr20, Cr26, Cr15Mo3 | HRC 58-63 | Low impact, high abrasion; fine crushing, sand making |
| Bi-Metallic Composite | Bimetal-A / B / C | HRC 58-68 (working layer) | Combined impact + abrasion; maximum service life |
| Alloy Steel | ZG-Mn13CrMo, Martensitic | HB 300-500 | Balanced toughness and wear resistance |
Send us your feed material type, particle size, and crusher model — our technical team will recommend the optimal grade within 24 hours.
No minimum order quantity. We accept orders of any size:
- Trial orders: 2-4 pieces for quality evaluation before bulk purchase
- Emergency replacements: single-unit orders for urgent downtime recovery
- Bulk orders: full-set shipments for scheduled maintenance or new installations
Pricing is tiered by volume — the more you order, the better the unit price. Contact us for a tailored quotation based on your quantity.
Standard lead time: 15-25 days from order confirmation and drawing approval.
- Repeat / standard orders: 15-20 days (molds already exist)
- New OEM / custom orders: 20-25 days (includes pattern making)
- Expedited orders: as fast as 7-10 days (subject to production slot availability)
Shipping transit time is additional: 10-30 days by sea, 5-7 days by air. Weekly production status updates provided.
Yes. Custom OEM/ODM is our core capability. We accept:
- Technical drawings (PDF, DWG, STEP, IGES)
- Physical samples — 3D scanning and reverse engineering
- Part numbers — cross-referenced against 2,000+ existing patterns
- Photos with dimensions — for simple geometries
Engineering team confirms feasibility within 2-3 working days. No design fees for standard orders.
Every batch includes a full inspection report with:
- Chemical composition analysis — OES spectrometer, traceable to GB/T & ASTM
- Hardness testing — Brinell (HB) and/or Rockwell (HRC) at multiple points
- Impact toughness — Charpy V-notch, per batch
- Dimensional inspection — calibrated gauges against approved drawing
- Dye penetrant / ultrasonic testing — available on request
Third-party inspection (SGS, Bureau Veritas, TUV) available at buyer’s request. All reports issued before shipment.
Yes. Every order includes a detailed installation manual with torque specifications, clearance settings, and rotation patterns. We also provide:
- Video guidance — step-by-step installation instructions
- Live technical support — WhatsApp/WeChat video call with our engineers during installation
- On-site commissioning — available for large projects (engineer dispatch to your site)
- Wear monitoring schedule — recommended inspection intervals based on your operating hours and feed material
Proper installation and maintenance can extend wear part service life by 20-40%. We help you get the maximum return on every part.
Our aftermarket wear parts are engineered to match or exceed OEM performance at 30-50% lower cost. Key comparisons:
| Factor | ZHILI Aftermarket | OEM Original |
|---|---|---|
| Material Quality | GB/T standard alloy, in-house smelting | Brand-specific proprietary alloy |
| Hardness / Toughness | Verified per specification with test reports | Comparable specifications |
| Dimensional Accuracy | CAD/CAM machining, tolerance <0.5mm | Factory-standard tolerance |
| Price | 30-50% below OEM | Premium pricing |
| Lead Time | 15-25 days (no inventory wait) | Often 30-60+ days for non-stock items |
| Certification | ISO 9001:2015, SSAB Hardox Authorized | OEM factory certification |
| Support | Direct engineer access via WhatsApp | Dealer-mediated support |
Our clients — including Holcim, CEMEX, and E.Bayer (Germany) — have been using ZHILI aftermarket parts for over 20 years with proven cost savings and reliable performance.
We manufacture aftermarket wear parts compatible with all major OEM crushers:
| Brand | Crusher Series | Example Models |
|---|---|---|
| Metso | C Series, NP Series, HP/GP Series | C80-C200, NP1110-NP1520, HP200-HP800 |
| Sandvik | CJ Series, CI Series, CH/CS Series | CJ408-CJ815, CI711-CI722, CH420-CH890 |
| FLSmidth | EV Series, RAPTOR, Excel | EV 200×300, RAPTOR 400, XL Series |
| ThyssenKrupp | TITAN Series, EB Series | TITAN 70D75, EB 12-10N |
| Hazemag | APK, APSE, HPI Series | APK 40, APSE 1313, HPI 2030 |
| Terex / SBM / Others | HSI, VSI, Jaw Series | HSI 500, VSI 6000, Cedarapids, Telsmith |
Over 200 crusher models covered. If your brand or model is not listed, send us the specifications — compatibility is highly likely.
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