Twin Shaft Mixer Arm
المواصفات الفنية
Key Attributes
| Product Name | Twin Shaft Mixer Arm / Horizontal Mixer Lever |
| Material Grade | GS700 / GGG70 Pearlitic Ductile Iron, Forged 42CrMo4 Steel |
| Tensile Strength | 700 – 750 MPa (Yield Strength 420–480 MPa) |
| Brinell Hardness | 260 – 320 HB (Matrix: Pearlitic Spheroidized Graphite) |
| Shaft Coupling Type | Square Shaft (90° Indexing), Hexagonal Shaft (60° Indexing), Keyway Shaft |
| Mixing Mechanics | 3D Counter-Current Figure-8 Turbulent Recirculation |
| Machine Compatibility | BHS, SICOMA, Liebherr, Teka, SIMI, ELKON, MEKA, Linz |
| Casting Process | Vacuum Sand Casting, MagmaSoft Thermal Simulation & Ultrasonic NDT |
| Brand Name | VOTNE |
| Place of Origin | China |
| SEO Keywords | twin shaft mixer arm, concrete mixer arm, BHS mixer arm, SICOMA twin shaft arm, Liebherr mixer arm, ductile iron mixer lever, concrete wear parts |
Product Overview
VOTNE Twin Shaft Mixer Arms are heavy-duty structural levers engineered specifically to withstand the extreme torsional and bending forces encountered inside high-capacity horizontal twin-shaft concrete batching mixers.
Mounted along twin parallel counter-rotating mixing shafts, these arms carry mixing blades at precise radial and axial angles, driving concrete slurry into a intense 3D figure-8 turbulent recirculation pattern. During high-speed mixing, coarse aggregate wedging (40mm to 60mm stone) and sudden slump changes impart massive peak shock loads to the mixing lever. Low-grade iron arms with internal casting voids or coarse flake graphite suffer fatigue cracking at the shaft hub neck, leading to catastrophic arm snap, gouged trough liners, and complete plant shutdown. VOTNE twin shaft mixer arms utilize high-density GS700 pearlitic ductile iron (700 to 750 MPa tensile strength) with 90%+ spherical graphite nodularity, completely eliminating brittle fracture risks.
Featuring CNC-machined split-hub keyway interfaces (90° square or 60° hexagonal indexing) and high-tensile Grade 10.9/12.9 clamping hardware, VOTNE twin shaft mixer arms ensure a zero-backlash fit, protecting main drive gearboxes and reducing your total cost per cubic meter.
Material & Metallurgy Selection
| Material Grade | Tensile Strength | Yield Strength | Impact Toughness | Best Application |
|---|---|---|---|---|
| VOTNE Forged 42CrMo4 Steel | 850 - 1000 MPa | 650 - 750 MPa | Extreme (>35 J/cm²) | Heavy Dam Mass Concrete & 60mm Stone Drops |
| VOTNE GS700 Ductile Iron | 700 - 750 MPa | 420 - 480 MPa | High (10 - 14 J/cm²) | Commercial Ready-Mix & Precast Concrete Plants |
| Standard GGG40 Ductile Iron | 400 - 450 MPa | 250 - 310 MPa | Medium (8 - 10 J/cm²) | Light-Duty Mortar & Small Pan Mixers |
Technical Specifications & Dimensions
| Mixer Brand / Model | Shaft Profile Size | Clamp Bolt Spec | Arm Neck Cross-Section | Approx. Weight (kg) |
|---|---|---|---|---|
| BHS DKXS 2.0 / 3.0 | 80mm Square Shaft | M20 Grade 10.9 (2 Screws) | Heavy Diamond Section | 24.8 kg |
| SICOMA MAO 2250 / 3000 | 70mm Hexagonal Shaft | M18 Grade 10.9 (2 Screws) | Reinforced Oval Neck | 20.1 kg |
| Liebherr DW 2.25 / 3.0 | 90mm Square Shaft | M20 Grade 12.9 (2 Screws) | Extra-Duty Box Section | 28.6 kg |
| TEKA TPZ 1500 / 2250 | 60mm Round Keyway | M16 Grade 10.9 (Wedge Bolt) | Tapered Lever Arm | 16.8 kg |
| Custom OEM Drawings | Custom Shaft Profile | As Per CAD Drawing | Tailored Section | Custom |
Key Advantages for Plant Operators
High Tensile & Fatigue Strength
GS700 pearlitic ductile iron with 90%+ spherical graphite nodules absorbs extreme bending fatigue under high-speed twin-shaft rotation.
3D Figure-8 Mix Homogeneity
Precision-machined mounting indexing ensures correct blade angular pitch, achieving 98%+ concrete uniformity in under 30 seconds.
Zero-Backlash Keyway Interface
CNC-machined split hubs clamp onto square or hexagonal shafts with zero rotational play, eliminating keyway fretting and gear shock.
Eliminates Sudden Arm Snap
High yield strength (420–480 MPa) absorbs sudden aggregate wedging impacts without fracturing, protecting mixer trough liners.
Standard & Custom OEM Stock
Direct replacement twin-shaft mixing arms in stock for major European and Asian mixer brands, with rapid custom casting available.
Applications & Field Use Cases
VOTNE Twin Shaft Mixer Arms are widely specified across heavy-duty industrial concrete mixing operations:
- Commercial Ready-Mix Concrete Batching Plants (Twin-Shaft Mixers 1.0m³ to 4.5m³)
- Precast Concrete Production Facilities (Planetary and Counter-Current Pan Mixers for pipe, beam, and precast slab casting)
- High-Impact Infrastructure & Dam Construction Projects (Mass concrete mixing with 40mm to 60mm aggregate)
- Cold Recycled Pavement & Road Base Mixing Plants
- Mining Paste Fill & Underground Backfill Preparation
- Heavy Refractory & Industrial Chemical Mixing Equipment
Frequently Asked Questions (FAQ)
1. How do I confirm VOTNE twin shaft mixer arms will fit my specific concrete mixer?
You can provide your mixer brand (e.g., BHS, SICOMA, Liebherr, Teka, SIMI, ELKON), model number, or existing arm part numbers marked on the casting. Alternatively, send us sample dimensions (shaft profile size, center distance, pitch angle) or CAD drawings, and our engineering team will verify exact compatibility.
2. Why is GS700 pearlitic ductile iron superior to standard cast iron for twin-shaft arms?
Standard gray iron contains brittle flake graphite that acts as internal stress risers, causing arms to snap under aggregate shock loads. VOTNE GS700 ductile iron contains spherical graphite nodules bound in a high-strength pearlitic matrix (700–750 MPa tensile strength), delivering maximum fatigue resistance and impact toughness.
3. What clamp bolt torque should be applied when mounting twin shaft arms?
For M18 Grade 10.9 clamping screws, torque to 330–360 N·m. For M20 Grade 10.9/12.9 screws, torque to 480–520 N·m. Always apply medium-strength threadlocker (Loctite 243) to bolt threads and re-torque after the first 24 hours (500 m³) of batching operation.
4. Can VOTNE manufacture custom twin shaft mixing arms for specialized batching plants?
Yes. VOTNE produces custom mixing arms based on customer sample castings or 2D/3D CAD drawings. We can customize square or hexagonal shaft hub dimensions, arm length, pitch angle, and blade mounting hole centers.
5. What are your lead times and trade terms for export orders?
Standard replacement twin shaft mixing arms for BHS, SICOMA, and Liebherr mixers are kept in stock for immediate shipment. Custom casting orders take 15 to 25 days. We support EXW, FOB, CIF, and DDP trade terms with global delivery.