Precision Granite Square Ruler China Factory and Professional Suppliers

Looking for high-precision granite right angle rulers? Our China factory provides professional suppliers of GB6092-85 standard tools for detecting verticality, flatness, and straightness. Crafted from high-density black granite for extreme wear resistance and thermal stability, these rulers are ideal for laboratory and industrial production.

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Details

Detailed Parameters

Material	Premium Granite / Marble	Precision Grade	0 Grade / 00 Grade
Dimensions	25016040mm	Proportion	2970-3070 Kg/m²
Compressive Strength	245-254 Kg/m²	Modulus of Elasticity	1.27-1.47 N/mm²
Linear Expansion	4.6×10-6/℃	Water Absorption	0.13%
Surface Hardness	HS70	Warranty	1 Year

Key Advantages

Extreme Wear Resistance

With a hardness of HS70, the granite surface resists scratching and abrasion, ensuring long-term dimensional stability.

Thermal Stability

Low linear expansion coefficient prevents measurement drift caused by ambient temperature fluctuations.

High-Grade Precision

Available in 00 grade for laboratory-level accuracy, meeting strict industrial quality control standards.

Optimal Density

High proportion density ensures the tool remains grounded and stable during heavy-duty industrial use.

Non-Magnetic Surface

Granite is naturally non-magnetic, eliminating interference when measuring ferromagnetic metal components.

Customized OEM/ODM

Flexible support for customized sizes and specifications to fit your specific manufacturing workflow.

Product Gallery

Management Platforms

Material Selection

Rigorous screening of black granite to ensure uniform density and zero internal flaws.

Precision Grinding

Advanced surface grinding technology to achieve 00 grade flat and square tolerances.

Quality Inspection

Every unit undergoes strict calibration checks before being approved for shipment.

Safe Packaging

Export-standard plywood boxes ensure zero damage during long-distance sea freight.

Logistics Network

Strategically shipped via Tianjin port for efficient global distribution.

After-Sales Support

Full 1-year warranty with professional technical guidance for calibration.

Investment Return Comparison

Feature	Cast Iron Square	Storan Granite Square
Wear Resistance	Medium (Prone to rust)	Extreme (High Hardness)
Stability	Thermal Expansion High	Ultra-Low Expansion
Maintenance	Regular Oiling Required	Minimal Cleaning Only
Accuracy Life	Degrades over time	Maintains precision years
Magnetic Effect	Magnetic Interference	Non-Magnetic

Frequently Asked Questions

Q: What is the difference between 0 grade and 00 grade precision?

00 grade offers a higher level of precision with tighter tolerances, typically used for master calibration in laboratories, while 0 grade is ideal for high-standard industrial production.

Q: How should I maintain the granite square ruler to ensure accuracy?

Keep the surface clean of dust and oil using a soft cloth. Avoid sudden temperature shocks and store it in its original plywood box when not in use.

Q: Can this tool be used for measuring magnetic materials?

Yes, granite is non-magnetic, making it the perfect choice for measuring magnetic components without any attraction or distortion.

Q: What is the lead time for bulk orders over 1200 pieces?

For orders exceeding 1200 pieces, the lead time is negotiable based on the specific customization requirements and current production capacity.

Q: Does the product support OEM customization?

Yes, we provide full OEM and ODM support, allowing you to customize dimensions, branding, and specific technical parameters to suit your needs.

Q: How is the product shipped to ensure it doesn't break?

Every Granite Square Ruler is securely packed in a professional plywood box designed for heavy-duty export and sea transport.

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