Hexagonal Shaft Mixing Arm
Especificações Técnicas
Key Attributes
| Product Name | Hexagonal Shaft Mixing Arm / 60° Hex Bore Mixing 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 | Precision 60° Hexagonal Bore (60mm, 70mm, 80mm Across Flats) |
| Torque Transmission | 6-Surface Equal Load Distribution (Eliminates Keyway Shear) |
| Machine Compatibility | SICOMA MAO / MSO, Teka, SIMI, ELKON, MEKA, Linz |
| Casting Process | Vacuum Sand Casting, MagmaSoft Thermal Simulation & Ultrasonic NDT |
| Brand Name | VOTNE |
| Place of Origin | China |
| SEO Keywords | hexagonal shaft mixing arm, hex bore mixer arm, SICOMA hex arm, Teka mixer arm, ductile iron mixer lever, concrete wear parts |
Product Overview
VOTNE Hexagonal Shaft Mixing Arms are precision-engineered structural levers featuring CNC 6-sided hexagonal bore couplings, designed specifically for high-efficiency twin-shaft concrete batching mixers (such as SICOMA MAO/MSO and Teka models).
The hexagonal shaft profile provides six wide flat contact faces that distribute drive torque evenly around the shaft perimeter. This 6-sided geometry allows finer 60° angular pitch indexing along the shaft, giving engineers precise control over material flow patterns. Furthermore, the hex coupling profile prevents binding during arm removal, allowing maintenance technicians to slide worn arms off the shaft quickly during plant overhauls. Operating in dense concrete slurry, the arm absorbs massive aggregate wedging forces (40mm to 60mm stone drops). VOTNE hexagonal shaft mixing arms utilize high-density GS700 pearlitic ductile iron (700 to 750 MPa tensile strength) with 90%+ spherical graphite nodularity, ensuring maximum bending fatigue strength and zero internal casting voids.
Equipped with CNC-machined split clamping hubs and Grade 10.9/12.9 fastener hardware, VOTNE hexagonal shaft mixing arms provide a rock-solid, zero-backlash fit that protects drive gearboxes and lowers your total wear 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 | Hex Shaft Flat-to-Flat Size | Clamp Bolt Spec | Radial Indexing Angle | Approx. Weight (kg) |
|---|---|---|---|---|
| SICOMA MAO 2250 / 3000 | 70mm Hex Across Flats | M18 Grade 10.9 (2 Screws) | 60° Precision Index | 19.8 kg |
| SICOMA MSO 1500 / 2000 | 60mm Hex Across Flats | M16 Grade 10.9 (2 Screws) | 60° Precision Index | 16.4 kg |
| TEKA TPZ 1500 / 2250 | 70mm Hex Across Flats | M18 Grade 10.9 (2 Screws) | 60° Precision Index | 20.2 kg |
| ELKON / MEKA 3.0 | 80mm Hex Across Flats | M20 Grade 10.9 (2 Screws) | 60° Precision Index | 24.5 kg |
| Custom OEM Drawings | Custom Hex Size | As Per CAD Drawing | Tailored Angle | Custom |
Key Advantages for Plant Operators
6-Surface Equal Torque Distribution
Hexagonal bore hub design distributes motor torque evenly across six flat drive surfaces, eliminating localized key stress.
60° Fine Angular Indexing
Six-sided hex geometry allows finer 60° rotational pitch adjustments along the shaft to optimize concrete slurry movement.
Rapid Slide-Off Maintenance
Hexagonal coupling profile prevents galling and binding, allowing maintenance crews to slide worn arms off shafts smoothly.
Zero-Backlash Clamping
Split-hub design with Grade 10.9/12.9 clamping screws secures the arm firmly to the hex shaft with zero rotational play.
Standard & Custom OEM Stock
Direct replacement hex shaft mixing arms in stock for SICOMA, Teka, and SIMI mixers, with custom hex sizes cast to order.
Applications & Field Use Cases
VOTNE Hexagonal Shaft Mixing Arms are widely specified across heavy-duty industrial concrete batching 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. What is the main technical advantage of a Hexagonal Shaft Mixing Arm?
A hexagonal shaft arm provides six drive contact faces, lowering unit contact pressure and enabling fine 60° radial pitch indexing along the shaft. The hex geometry also prevents mechanical galling, making arm removal significantly faster during routine plant maintenance.
2. How do I measure my hexagonal drive shaft to order replacement arms?
Measure the flat-to-flat distance across two opposing parallel faces of the hex shaft using a precision vernier caliper (e.g., exactly 60.0mm, 70.0mm, or 80.0mm). VOTNE hex bore hubs are CNC-machined to +0.1mm/-0.0mm tolerance for an exact fit.
3. What clamp bolt torque should be applied when mounting hex shaft arms?
For M16 Grade 10.9 clamping screws, torque to 240–260 N·m. For M18 Grade 10.9 screws, torque to 330–360 N·m. For M20 screws, torque to 480–520 N·m. Always apply medium-strength threadlocker (Loctite 243) and re-torque after the first 24 hours (500 m³) of operation.
4. Can VOTNE manufacture custom hex bore mixing arms for non-standard hex sizes?
Yes. VOTNE produces custom hexagonal shaft mixing arms based on customer sample castings or 2D/3D CAD drawings. We can customize hex bore flat-to-flat dimensions (e.g., 55mm, 65mm, 75mm, 85mm), arm length, pitch angle, and blade mounting hole centers.
5. What are your lead times and trade terms for export orders?
Standard replacement hex shaft mixing arms for SICOMA and Teka 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.