UNPARALLELED LTD is one of the leading manufacturers and suppliers of granite linear motion stage in China. With abundant experience, we warmly welcome you to buy advanced granite linear motion stage made in China here from our factory. We also accept custom orders.
Product Overview
In the realm of ultra-precision engineering, material stability is non-negotiable. You are looking at UNPARALLELED®'s high-density black granite linear motion stage, a cornerstone component designed to eliminate vibration, thermal drift, and geometric errors in critical industrial applications.
This isn't just a base; it is the foundation of accuracy. The dark, fine-grained texture of our premium granite (approx. 3,100 kg/m³) ensures exceptional damping properties, far superior to standard cast iron or steel. Pre-installed with precision-machined linear guideways and a central mounting slider, this assembly is purpose-built for applications demanding nanometer-level positioning, such as semiconductor lithography, high-end CMMs (Coordinate Measuring Machines), and advanced optical inspection systems.
Core Features & Technical Specifications
We engineered this component to serve as a rock-solid interface between dynamic motion systems and a stationary environment.
| Feature | Detail & Benefit |
|---|---|
| Material Composition | Premium High-Density Black Granite. Naturally resistant to corrosion, non-magnetic, and boasts excellent dimensional stability. |
| Pre-Installed Guideways | Dual high-precision linear rails are factory-aligned to ensure perfect parallelism and straightness, saving you days of assembly and calibration. |
| Zero Thermal Expansion | Granite's low coefficient of thermal expansion means the stage maintains flatness even under varying ambient temperatures, ensuring measurement reliability. |
| Vibration Damping | Superior to steel and cast iron. Granite absorbs high-frequency vibrations generated by moving motors, resulting in smoother motion and clearer sensor data. |
| Custom Machinability | Available in custom dimensions, tapped hole patterns, and complex mounting geometries to fit your specific equipment footprint. |
| Factory-Tested | Subjected to rigorous 24-hour natural aging and precision grinding processes before shipping. |
Why Precision Granite? The "Silent" Advantage
When you choose a granite linear guide assembly, you aren't just choosing a heavy rock. You are choosing silence and stability. In optical inspection or semiconductor manufacturing, micro-vibrations from the factory floor or nearby machinery can ruin a batch. Our granite's internal structure acts as a massive vibration sink, allowing your sensitive encoders and laser interferometers to operate exactly as calibrated.
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Applications
- Semiconductor Equipment: Wafer inspection, lithography stages, and die bonders require absolute thermal stability to prevent feature misalignment.
- Coordinate Measuring Machines (CMM): The bridge or base of a CMM must be perfectly flat to ensure that 3D measurements are true to the object's geometry.
- Optical Inspection Systems: Laser scanning and vision systems rely on a vibration-free platform to achieve high-resolution imaging without motion blur.
- Precision Assembly: Automated robotic assembly lines for aerospace or medical components utilize granite rails to ensure end-effectors hit their targets with micron-level repeatability.
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FAQ
1. Why is high-density granite better than steel for precision stages?
Steel is susceptible to rust and magnetism, and it transmits high-frequency vibrations directly into your components. Granite is non-magnetic, corrosion-resistant, and absorbs vibration. Its density (around 3,100 kg/m³) provides the rigidity needed to support heavy moving parts without flexing, while its thermal conductivity is low, insulating your sensitive equipment from external temperature fluctuations.
2. Do you perform aging treatment on your granite components?
Absolutely. Granite has natural internal stresses. After rough machining, our granite components undergo a mandatory 3 to 6-month natural aging period (or accelerated artificial aging) before final precision grinding. This ensures the material reaches a stress-free state, guaranteeing that your stage will remain flat and straight for decades of operation.
3. What level of precision can your linear guide stages achieve?
Using advanced grinding equipment and in-house metrology, we routinely achieve straightness, parallelism, and flatness tolerances in the single-digit micron range (and sub-micron upon specific request) for guideways and mounting surfaces. We provide comprehensive inspection reports traceable to international standards with every order.
4. Can you add tapped holes or specific mounting features to the granite?
Yes. Granite is highly adaptable. We can pre-tap holes, create counterbores, mill grooves, or add embedded metal inserts directly into the granite block. Send us your 3D CAD model or technical drawing, and our engineers will optimize the machining process to maintain structural integrity.
5. Do you manufacture custom-sized granite assemblies?
Yes, customization is our core strength. Whether you need a small, 500mm optical stage or a massive, 5-meter industrial base, our 200,000 m² facility and advanced multi-axis gantry grinders can handle workpieces up to 20 meters long and 100 tons in weight.
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