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Included File Formats
This model is provided in 14 widely supported formats, ensuring maximum compatibility:
• - FBX (.fbx) – Standard format for most 3D software and pipelines
• - OBJ + MTL (.obj, .mtl) – Wavefront format, widely used and compatible
• - STL (.stl) – Exported mesh geometry; may be suitable for 3D printing with adjustments
• - STEP (.step, .stp) – CAD format using NURBS surfaces
• - IGES (.iges, .igs) – Common format for CAD/CAM and engineering workflows (NURBS)
• - SAT (.sat) – ACIS solid model format (NURBS)
• - DAE (.dae) – Collada format for 3D applications and animations
• - glTF (.glb) – Modern, lightweight format for web, AR, and real-time engines
• - 3DS (.3ds) – Legacy format with broad software support
• - 3ds Max (.max) – Provided for 3ds Max users
• - Blender (.blend) – Provided for Blender users
• - SketchUp (.skp) – Compatible with all SketchUp versions
• - AutoCAD (.dwg) – Suitable for technical and architectural workflows
• - Rhino (.3dm) – Provided for Rhino users
Model Info
• - All files are checked and tested for integrity and correct content
• - Geometry uses real-world scale; model resolution varies depending on the product (high or low poly)
• • - Scene setup and mesh structure may vary depending on model complexity
• - Rendered using Luxion KeyShot
• - Affordable price with professional detailing
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More Information About 3D Model :
The Two-Step Stepped Pulley with Dual Double Grooves is a highly specialized mechanical power transmission component engineered for drive systems requiring both adjustable speed ratios and increased torque capacity or redundancy via parallel belt operation. Formally classified as a stepped sheave, this component is crucial in continuously variable transmission (CVT) analogues where mechanical speed changes are required between a driving source and a driven load.
Structural Characteristics and Nomenclature
The component features a monolithic, cylindrical body with two distinct, concentric working diameters, designated as Step 1 ($D_1$) and Step 2 ($D_2$). The term 2 Step refers exclusively to these two diameters, which define the fixed kinematic ratios available within the system.
A defining characteristic is the Dual Double Groove configuration. On the face of $D_1$, two parallel circumferential grooves are precisely machined. Similarly, two identical parallel grooves are cut into the face of $D_2$. This results in a total of four working grooves on the pulley face (two sets of dual grooves), capable of accommodating two separate belts simultaneously on each step.
These grooves are typically profiled (e.g., V-shaped) to match standard industrial belts, ensuring efficient frictional engagement and preventing slippage under load. The ratio of $D_1$ to $D_2$ determines the incremental change in output speed or torque when the drive belt (or belts) is manually shifted between the steps.
Functional Purpose
The primary function of this stepped design is ratio variability. When paired with a corresponding pulley (often an identical two-step pulley or a simple single-diameter pulley), the system creates a mechanical speed variator. By shifting the belt(s) from the smaller diameter on the driver to the larger diameter on the driven pulley (or vice-versa), the rotational speed and resulting output torque are adjusted.
The incorporation of dual parallel grooves serves two major mechanical purposes:
- Enhanced Load Capacity: By utilizing two parallel belts (or a wide, dual-ribbed belt) on a single step, the effective contact area and frictional engagement are doubled. This significantly increases the pulley’s capacity to transmit higher torque loads without premature belt wear or system slip, compared to a standard single-groove pulley of the same pitch diameter.
- Redundancy and Stability: In critical applications, the dual-belt configuration offers inherent mechanical redundancy. It also improves stability and mitigates side loading effects on bearings by distributing the tension forces more evenly across the pulley’s face width.
### Materials and Applications
These specialized pulleys are typically fabricated from robust, high-strength materials, including cast iron, aluminum alloys (for high-speed or reduced inertia requirements), or hardened steel. Precision machining is mandatory to maintain strict tolerances, especially regarding groove parallelism and concentricity, which ensures uniform tension distribution across the dual belt paths.
The Two-Step Stepped Pulley with Dual Double Grooves is commonly employed in heavy-duty machinery, machine tools (such as lathes, drill presses, and milling machines where precise speed control and high power output are necessary), industrial mixers, specialized textile equipment, and ventilation systems where load variability and reliability are paramount.
KEYWORDS: Pulley, Sheave, Stepped Pulley, Dual Groove, Double Groove, Two Step, Belt Drive, Power Transmission, Kinematics, Ratio Adjustment, Speed Variator, CVT, Torque Capacity, Load Distribution, Redundancy, Concentricity, V-Belt, Drive System, Machine Component, Mechanical Advantage, Pitch Diameter, Face Width, Frictional Drive, Stepped Sheave, Industrial Machinery, Belt Track, Transmission Component, Dual Path, Parallel Drive, Drive Component.
