Precision Granite Square Ruler China Factory Industrial Grade Suppliers
The Storan Granite Square Ruler is a premium industrial-grade precision measurement instrument engineered for the most demanding quality control environments. Crafted from high-density black granite or marble, this L-shaped ruler is specifically designed to provide an ultra-stable reference surface for testing perpendicularity and angle accuracy in industrial production and laboratory settings.
Available in Grade 0 and Grade 00 precision levels, this master triangle ruler ensures minimal thermal expansion and maximum wear resistance. Whether you are performing critical component inspections or calibrating manufacturing machinery, our granite square offers the unparalleled stability and reliability required to maintain strict tolerance standards in metalworking and tool manufacturing.
Detailed Parameters
| Material | Premium Granite / Marble | Precision Grade | Grade 0 / Grade 00 |
|---|---|---|---|
| Dimensions | 25016040mm | Density | 2970-3070 Kg/m² |
| Compressive Strength | 245-254 Kg/m² | Elastic Modulus | 1.27-1.47N/mm² |
| Expansion Coeff. | 4.6×10-6/℃ | Water Absorption | 0.13% |
| Hardness | HS70 | Warranty | 1 Year |
Key Advantages
Extreme Stability
High-density granite ensures a rigid structure that resists deformation under pressure during industrial measurements.
Wear Resistance
With a hardness of HS70, the surface is exceptionally resistant to scratches and abrasive wear over long-term use.
High Precision
Available in Grade 00 for laboratory-grade accuracy, ensuring perfect 90-degree angle verification.
Low Thermal Drift
A low linear expansion coefficient minimizes measurement errors caused by temperature fluctuations.
Low Water Absorption
At only 0.13% absorption, the ruler remains unaffected by humidity, preserving its dimensional integrity.
Custom Support
Full OEM and ODM customization available to meet specific size and technical requirements of your project.
Product Gallery
Management Platforms
Quality Assurance
Strict adherence to 00 grade precision standards for every single unit produced.
OEM/ODM Services
Flexible manufacturing capabilities to customize dimensions and materials for specialized needs.
Logistics Support
Secure sea shipping with reinforced plywood packaging to prevent damage during transit.
Fast Lead Times
Efficient production cycles with delivery within 8 days for orders up to 1200 pieces.
Export Packaging
Professional export-standard plywood boxes ensuring stability and safety upon arrival.
Technical Support
Expert guidance on the selection of granite tools for different industrial measurement tasks.
Investment Return Comparison
| Feature | Standard Steel Square | Storan Granite Square |
|---|---|---|
| Dimensional Stability | Medium (Thermal expansion) | Excellent (Ultra-low expansion) |
| Surface Wear | Prone to rust/scratches | Highly resistant (HS70 Hardness) |
| Precision Level | Industrial Grade | Laboratory Grade (00 Class) |
| Maintenance | Requires oiling/anti-rust | Low maintenance / Wipe clean |
| Long-term ROI | Frequent replacement | Permanent industrial asset |
Frequently Asked Questions
Grade 00 offers higher precision and tighter tolerances, typically used in laboratory settings or for master calibration, while Grade 0 is ideal for high-precision industrial production.
Granite is non-magnetic, has a lower coefficient of thermal expansion, and is significantly more resistant to wear and corrosion compared to steel.
Each Granite Square is secured in a professional export-grade plywood box to ensure it reaches the destination without any damage or loss of precision.
Yes, we provide comprehensive OEM and ODM support. Please contact us with your specific dimensions and precision requirements.
For orders between 1 to 1200 pieces, the lead time is 8 days. For quantities exceeding 1200 pieces, the lead time is negotiable based on production capacity.
Simply wipe the surface with a clean, soft cloth. Avoid using harsh chemicals. Store in a stable temperature environment to maintain maximum precision.
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