China Industrial Granite Surface Plate 200×300mm to 8000×2000mm with 5.6-7 Moh's Hardness for Precision Inspection for sale

Industrial Granite Surface Plate 200×300mm to 8000×2000mm with 5.6-7 Moh's Hardness for Precision Inspection

Price Negotiable

Price: Negotiable

MOQ: 1

Delivery Time: 15 days

Brand: Willing

Product Description

Industrial Granite Surface Plates for Precision Inspection

High-performance granite surface plates designed for precision gauging, inspection, layout, and marking applications in tool rooms, engineering industries, and research laboratories.

Key Features & Specifications

Constructed from close-grained granite with uniform color and texture
Hardness rating: 5.6 to 7 on Moh's scale
Available in sizes from 200×300mm to 8000×2000mm
Conforms to international standards: GB117-2015, DIN-876-1972, BS-817-1988, JIS-B-7513, US Federal GGG-P-463-C
Optional features: metallic threaded inserts, T-slots, ledges, steel stands with leveling screws
Includes protective rexine cover for working surface
Available in Grade 00 precision as per DIN 876

Material Properties

Jinan Black Granite physical characteristics:

Specific Gravity: 3.03 g/cm³
Shore Hardness: >70Hs-80Hs
Tensile Strength: 211 Kg/cm²
Compressive Strength: 245-254 MPa
Linear Expansion Coefficient: 4.61×10⁻⁶/°C
Elastic Modulus: 30-50 GPa
Water Absorptivity: ≤0.13%

Precision Grade Specifications

Flatness tolerance according to JB/T 7975-1999:

Grade 000 = 1×(1+d/1000) μm
Grade 00 = 2×(1+d/1000) μm
Grade 0 = 4×(1+d/1000) μm
Grade 1 = 8×(1+d/1000) μm
Where d = length of the diagonal

Product Specifications Table

Dimensions (L×W×T mm)	Weight (kg)	Grade 00 (μm)	Grade 0 (μm)	Grade 1 (μm)
300×200×50	17	3	6	12
300×300×50	19	3	6	12
400×300×70	25	3	6	12
400×400×70	48	3.5	6.5	13
630×400×100	76	3.5	7	14
630×630×100	155	4	8	16
800×500×130	156	4	8	16
1000×630×130	284	4.5	9	18
1000×750×150	338	5	9	18
1000×1000×150	450	5	10	20
1600×1000×200	963	6	12	24
2000×1000×200	1200	6.5	13	26
1600×1600×300	2312	6.5	13	26
2000×1600×300	2890	7	14	28
2500×1600×300	3612	8	16	32
3000×2000×500	9030	9	18	36
4000×2000×500	12040	11	22	44
6000×2000×700	25284	15	30	60

Applications

Ideal for measuring parallel and equal altitude of precision instruments, tools, and mechanical components in modern industrial and scientific research environments.