Marble square ruler

There are various specifications for Marble square ruler,and the following are some common specifications:

Side length:160 x 160mm,200 x 200mm,300 x 300mm,400 x 400mm,500 x 500mm,600 x 600mm,800 x 800mm,etc.

Thickness:usually between 40-100mm,such as 40mm,50mm,80mm,100mm,etc.For example,granite rulers with specifications such as 100x100x40mm,200x200x50mm,800x800x80mm,and 1000x1000x100mm are also quite common.

Processing technology

Material selection:natural stones such as"Jinan Green","Mount Taishan Green"and"Mount Taishan Green White Grain"are selected.These stones have precise structure,good stability,uniform texture,large strength and high hardness.

Mechanical processing:By using cutting,polishing and other mechanical processing techniques,the stone is processed into a rough square shape to determine its basic dimensions and shape.

Hand grinding:Hand grinding is carried out by professional workers to further improve the smoothness and accuracy of the surface of the square ruler,ensuring that the flatness,straightness,and perpendicularity of the measuring surface meet the requirements.

Testing and Calibration:High precision measuring instruments and methods are used to comprehensively test the processed granite ruler,calibrate its various accuracy indicators,and ensure compliance with the corresponding accuracy level standards.

Accuracy level:generally divided into 00 level,0 level,1 level,etc.,with decreasing accuracy in sequence.The highest accuracy is at level 00,suitable for high-precision measurement and detection work;Level 0 accuracy is second,which can meet the precision measurement requirements in general industrial production;Level 1 accuracy is relatively low,but it can still meet some situations where accuracy requirements are not particularly high.

Maintenance

Handle with care:During transportation and use,handle with care to avoid collisions and drops,and prevent hard objects from hitting the working surface and causing dents,which can affect accuracy.

Correct placement:When using,the granite ruler should be placed upright and stable,ensuring that it is tightly adhered to the surface of the object being measured to ensure measurement accuracy.

Regular cleaning:Regularly wipe the surface of the ruler with a clean soft cloth to remove dust and dirt.When the surface is contaminated,it is advisable to use lighter corrosive agents such as lemon juice or vinegar to clean the stains,and avoid using materials such as soap or baking soda that can easily damage the granite essence for wiping.

Rust prevention and lubrication:When not in use for a long time,a special lubricating oil should be used to wipe the square ruler.If there is no special lubricating oil,edible oil can also be used as a substitute.When used again,wipe it dry with a soft cloth.