A granite platform is a platform product made of granite processed with machine tools and then hand-ground in a constant-temperature chamber to achieve high flatness accuracy.

 

Physical parameters of granite platform (reference/typical):

Specific gravity: 2970–3070 kg/m³;

Compressive strength: 245–254 kg/m²;

Elastic wear: 1.27–1.47 N/mm²;

Linear expansion coefficient: 4.6 × 10⁻⁶/°C;

Water absorption rate: 0.13;

Shore hardness: HS70 or above.

 

The accuracy of granite platforms is significantly higher than that of cast iron platforms. This is because granite is subjected to long-term aging treatment and no longer has internal stress. Accuracy grades 000, 00, 0, and 1 are ideal tools for layout, marking, and inspection in processing enterprises.

 

Place of Origin: Hebei, China

Warranty: 1 year

Customized support: OEM, ODM, OBM

Brand Name: Storan

Model Number: 1006

Material: Granite

Color: blank

Specification: 200 × 200 mm – 3000 × 5000 mm, or customize

Surface: flat, tapped holes, T-slots, etc.

Working surface hardness: HS70

Surface treatment: ground finish

Precision grade: 0–2

Stand: available

Packaging: plywood box

Usage: precision gauging, inspection, layout, and marking

Packaging Details: Plywood box

Supply Ability: 20,000 pieces per year

 

Lead time:

Quantity (pieces)	1–1	> 1
Lead time (days)	30	To be negotiated

 

Granite Surface Plate:

Granite surface plates are well known for their rust-resistant properties. The hardness of granite surface plates is also greater than that of cast iron surface plates. They are widely used for precision gauging, inspection, layout, and marking, and are preferred by laboratories, engineering industries, and workshops.

 

Material: Granite

Specification: 1000 × 750 mm – 3000 × 4000 mm, or customize

Surface: flat, tapped holes, T-slots, etc.

Hardness of the working surface: HS70

Surface treatment: ground finish

Precision grade: 0–2

Packaging: plywood box

 

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No.	Width × Length (mm)	Precision Grade
		0	1
		Flatness (μm)
1	200 × 200	3.5
2	300 × 200	4
3	300 × 300	4
4	300 × 400	4
5	400 × 400	4.5
6	400 × 500	4.5
7	400 × 600	5
8	500 × 500	5
9	500 × 600	5
10	500 × 800	5.5
11	600 × 800	5.5
12	600 × 900	6
13	1000 × 750	6
14	1000 × 1000	7
15	1000 × 1200	7
16	1000 × 1500	8
17	1000 × 2000	9
18	1500 × 2000	10
19	1500 × 2500	11
20	1500 × 3000	13
21	2000 × 2000	11
22	2000 × 3000	13	27
23	2000 × 4000	16	32
24	2000 × 5000	19	37
25	2000 × 6000	22	43
26	2000 × 7000	25	49
27	2000 × 8000	27.5	54.5
28	2500 × 3000	14.5	28.5
29	2500 × 4000	16.5	33
30	2500 × 5000	19.5	39
31	2500 × 6000	22	44
32	3000 × 3000	15.5	30.5
33	3000 × 4000	17.5	35
34	3000 × 5000	20	40

 

Why Granite Surface Plates are Essential for Precision Measurement

 

In the realm of precision measurement, granite surface plates are an indispensable tool for quality control and engineering applications. Their unique properties make them the preferred choice among precision engineers, machinists, and quality assurance professionals.

 

Granite surface plates are made from natural granite, known for its exceptional hardness, stability, and resistance to deformation. This solid foundation enables accurate measurements by providing a flat, stable reference surface. Unlike other materials, granite does not warp or change shape over time, helping ensure that measurements remain consistent and reliable.

 

One of the key advantages of granite surface plates is their ability to withstand wear from repeated use. This durability is vital in industrial settings where precision is paramount. In addition, granite is chemically resistant, allowing it to withstand exposure to oils, solvents, and other contaminants without losing its integrity. This helps maintain a clean working environment and supports the long-term performance of measurement equipment.

 

Granite surface plates are also available in various sizes and configurations to suit different applications. Whether used for inspecting machined parts, aligning equipment, or supporting intricate assembly tasks, these plates provide a versatile solution for precision measurement needs. Their smooth surface can be cleaned and maintained easily, supporting long-term usability and accuracy.

 

In conclusion, granite surface plates are essential for any operation that requires high-precision measurements. Their durability, stability, and resistance to environmental factors make them the ideal choice for professionals across a wide range of industries. Investing in a granite surface plate not only improves measurement accuracy but also helps ensure the longevity of your tools and equipment, making it a wise decision for quality-focused organizations.

 

The Role of Granite Surface Plates in Modern CNC Machining

 

In modern CNC (Computer Numerical Control) machining, precision is paramount. Among the tools that enable this accuracy, granite surface plates stand out as a cornerstone of the machining process. Their role is both vital and multifaceted, providing a stable foundation that supports optimal performance.

 

Granite surface plates are highly valued for their exceptional rigidity and stability. Made from natural granite, they offer a flat, hard surface that is essential for measuring and inspecting machined parts. The inert properties of granite also help minimize the impact of temperature fluctuations, supporting consistent precision over time. This stability is critical in CNC machining environments, where even minor deviations can lead to significant errors in the final product.

 

Furthermore, granite surface plates provide high wear resistance, enabling them to withstand the demands of daily use in manufacturing settings. Unlike other materials, granite does not deform under pressure, preserving flatness and accuracy even under heavy loads. In addition, their non-porous nature makes cleaning and maintenance easier, further supporting long service life.

 

In CNC machining, granite surface plates serve as essential tools not only for aligning and supporting workpieces during machining, but also for precision measurement. They are crucial when calibrating CNC machines, as they provide reliable reference points to ensure that each component is processed correctly.

 

In conclusion, the role of granite surface plates in modern CNC machining cannot be overstated. They provide the stability, durability, and accuracy that are critical for high-quality machining processes. As the industry continues to evolve, the use of granite surface plates will remain a key element in achieving manufacturing excellence.

 

Material Properties and Physical Advantages of Granite Inspection Surface Plates

 

STORAEN’s granite surface plates are engineered to deliver unmatched stability and precision as the foundation for industrial measurement, leveraging the unique material properties of natural granite to set the benchmark in metrology. As a trusted provider of precision granite surface plates and granite inspection tables, we offer solutions that perform exceptionally in demanding environments—from CNC machining workshops to aerospace calibration labs.

 

Geological Foundation for Unmatched Stability

 

Formed over billions of years from igneous rock composed primarily of pyroxene and plagioclase, our granite surface plates feature a dense, uniform crystalline structure (grain size ≤0.5 mm) that eliminates internal stresses—an important advantage over metallic alternatives that can be prone to warping or corrosion. This natural composition results in a consistently black surface with minimal porosity, providing an ideal flat reference for surface plate calibration and dimensional inspections where micron-level accuracy is non-negotiable.

 

Mechanical Properties Built for Heavy-Duty Use

 

The physical attributes of our granite inspection tables are optimized for industrial demands:

 

High Load-Bearing Capacity: With a density of 2970 kg/m³ and compressive strength of 245 MPa, these plates withstand static loads up to 5000 kg/m² without deformation—ideal for supporting heavy components during modular welding table setups or CNC machine calibration.
Exceptional Hardness: A Shore D hardness of 70+ resists scratches and indentations from frequent gauge or fixture contact, helping keep the surface free from defects that could compromise measurement integrity over decades of use.
Vibration Damping: The granular microstructure absorbs 80% more vibration than cast iron, minimizing interference from adjacent machinery—an essential feature for precision tasks such as coordinate measuring machine (CMM) alignment.

 

Environmental Resilience for Consistent Accuracy

 

STORAEN’s granite surface plates for sale perform reliably in challenging conditions thanks to:

 

Thermal Stability: A low coefficient of linear expansion (4.6 × 10⁻⁶/°C) ensures minimal dimensional change across temperature ranges (10–30°C), reducing errors caused by thermal fluctuations in unconditioned workshops.
Corrosion Resistance: With a water absorption rate of just 0.13%, the non-porous surface repels oils, coolants, and moisture—helping eliminate rust or chemical degradation commonly seen with steel plates.
Zero Magnetic Permeability: Non-magnetic properties make these plates ideal for industries where electromagnetic interference could skew sensor-based measurements, such as semiconductor manufacturing or medical device testing.

 

Design Excellence for Practical Use

 

Beyond natural material advantages, our plates include precision-machined details:

 

Surface Finish: A ground finish of Ra ≤ 0.8 μm provides optimal contact for dial indicators, height gauges, and other metrology tools, supporting repeatable results within ±2 μm for 000-grade plates.
Modular Compatibility: Standard sizes (200 × 200 mm to 3000 × 5000 mm) and optional T-slots or mounting holes enable seamless integration with modular welding tables or custom fixtures, enhancing versatility across production and inspection workflows.

 

Trust STORAEN for Material-Driven Precision

 

When accuracy and longevity are non-negotiable, STORAEN’s granite surface plates deliver the natural and engineered advantages required to elevate your metrology processes. Whether used as a reference for surface plate calibration, a stable platform for aerospace component inspection, or a durable base for heavy-duty welding setups, our solutions combine geological performance with industrial-grade design.

 

Customization Services and Quality Assurance for STORAEN Granite Inspection Surface Plates

 

STORAEN is proud to deliver granite surface plates that meet the unique demands of your precision measurement and industrial applications. Beyond standard offerings, our customization services and rigorous quality assurance ensure that every precision granite surface plate and granite inspection table is tailored to your requirements—supported by certifications and guarantees that inspire confidence in every measurement.

 

Tailored Solutions for Every Requirement

 

Custom Sizing & Geometry

 

Whether you need a compact granite inspection table for laboratory use (200 × 200 mm) or an oversized platform for heavy machinery (up to 5000 × 8000 mm), our engineers work with you to define dimensions, thickness, and shape—including circular, rectangular, or non-standard designs. Custom edge profiles (chamfered, beveled) and recessed bases enhance stability when integrating with modular welding tables or automated fixtures.

 

Surface Features for Functional Excellence

 

T-Slots & Mounting Holes: Precision-machined T-slots (ISO 2571 standard) or threaded holes (M6–M24) enable secure clamping of gauges, fixtures, or robotic arms—ideal for dynamic inspection setups or modular welding table configurations.
Specialized Coatings: Optional anti-static or anti-slip coatings help protect against dust accumulation or component slippage in semiconductor or medical device manufacturing environments.

 

Multi-Platform Compatibility

 

Our granite surface plates are designed to integrate seamlessly with coordinate measuring machines (CMMs), height gauges, and surface plate calibration systems, with pre-machined reference points for traceable measurements aligned with global standards (ISO 8512, ASME B89.1.3).

 

Uncompromising Quality Assurance Process

 

Material Selection & Inspection

 

Every slab starts with premium-grade granite (grain size ≤0.5 mm, water absorption ≤0.13%), visually and ultrasonically tested to eliminate internal flaws. Only rock with uniform density (2970 kg/m³+) and Shore D hardness ≥70 is approved for machining.

 

Precision Manufacturing

 

Grinding & Polishing: State-of-the-art CNC grinders achieve surface finishes as fine as Ra 0.8 μm, with planar flatness controlled to ±2 μm for 000-grade plates—verified using laser interferometers.
Thermal Stress Relief: Plates undergo 72-hour stabilization at 20 ± 2°C to eliminate residual machining stresses, ensuring long-term dimensional stability in fluctuating workshop environments.

 

Warranty & After-Sales Support

 

Global Service Network: For granite surface plates for sale worldwide, our team provides installation guidance, periodic recalibration services, and rapid response to technical inquiries—ensuring your investment maintains peak performance for decades.

 

Choose STORAEN for Customized Precision

 

Whether you require a bespoke granite inspection table for aerospace component alignment, a heavy-duty granite surface plate for industrial welding fixtures, or a calibrated platform for lab-grade metrology, STORAEN’s customization and quality assurance set the standard. Our commitment to matching your exact needs with geological durability and engineering precision makes us the partner of choice for manufacturers who refuse to compromise on measurement integrity. Explore our granite surface plates for sale today and experience the power of a solution built exclusively for you.