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Phone
13832708800
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Address
No.3 Huaxi Industrial Zone, Cangzhou City, Hebei Province
Product Categories
Cangzhou Sanfeng Standard Measuring Tools Co., Ltd
Granite (marble) square ruler
NegotiableUpdate on 02/01
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Overview
Granite square ruler (marble square ruler) is mainly used for detecting parallelism and perpendicularity. The main mineral components of the rock ruler are evaporite, plagioclase, a small amount of olivine, biotite, and trace magnetite. It has a black color, precise structure, and has undergone billions of years of aging, with uniform texture, good stability, high strength, and high hardness. It can maintain high precision under heavy loads.
Product Details
Granite square rulerMainly used for detecting parallelism and perpendicularity.Marble square rulerThe main mineral components are escape stone, plagioclase, a small amount of olivine, biotite, and trace magnetite. It has a black color and a precise electrical code structure. After billions of years of aging, its texture is uniform, stable, strong, and hard, and it can maintain high precision under heavy loads.
Granite square rulerSuitable for industrial production and laboratory measurement work.
Physical properties of granite square ruler:
Granite square rulerSuitable for industrial production and laboratory measurement work.
Physical properties of granite square ruler:
Specific gravity: 2970~3070kg/m3
Compressive strength: 245~254N/mm2
Elastic wear: 1.27-1.47N/mm2
Linear expansion coefficient: 4.6 × 10~6 ℃
Water absorption rate: 0.13%
Shore strength: above HS70
Marble square rulerTechnical parameters of granite square ruler:
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Specification (mm)
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Verticality of adjacent sides
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Measuring surface straightness
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Relative measurement plane parallelism
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Accuracy level (um)
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00
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0
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00
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0
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00
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0
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160×160
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2
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4
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0.8
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1.7
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2
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4
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200×200
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2
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4
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0.9
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1.8
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2
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4
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300×300
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2.6
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5.2
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1.1
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2.3
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2.6
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5.5
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400×400
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3
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6
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1.3
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2.3
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3
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6
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500×500
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3.5
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7
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1.5
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3
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3.5
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7
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600×600
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4.5
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9
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2
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4
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4.5
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9
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800×800
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5
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10
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3
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6
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5
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10
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