Granite Ruler

A granite ruler is a precision measuring tool made of granite,which is widely used in various fields that require high-accuracy measurement.Here is a detailed introduction:

Characteristics

High Precision:Granite rulers are known for their high measurement accuracy.They are manufactured with advanced processing techniques to ensure that the scale is clear,accurate,and has a low error rate.The flatness and straightness of the ruler surface are also strictly controlled,usually with flatness errors within a few micrometers,which can provide very accurate measurement references.

Good Stability:Granite has excellent physical and chemical properties.It has a low coefficient of thermal expansion,is not easily affected by temperature changes,and can maintain stable dimensional accuracy in different temperature environments.In addition,granite is wear-resistant,corrosion-resistant,and not easily deformed,which can ensure the long-term accuracy and service life of the ruler.

High Hardness:The hardness of granite is relatively high,which can resist scratches and abrasions during use and maintain the integrity of the ruler surface and scale.This makes the granite ruler suitable for use in harsh industrial environments and frequent measurement operations.

Types

Standard Granite Ruler:This is the most common type,usually with a rectangular cross-section and a scale engraved on the surface.It is available in different lengths,such as 100 mm,200 mm,300 mm,etc.,to meet the measurement needs of different sizes of workpieces.

Grooved Granite Ruler:Some granite rulers have grooves on the surface,which are mainly used to measure the depth or width of grooves,steps,and other structures on the workpiece.The grooves on the ruler can be designed according to different measurement requirements,such as V-shaped grooves,U-shaped grooves,etc.

Graduated Granite Ruler:In addition to the basic scale,the graduated granite ruler also has some additional graduations or markings,such as angle graduations,which can be used to measure angles or perform angular alignment operations.This type of ruler is often used in the processing and measurement of precision mechanical parts and optical components.

Applications

Machining Industry:In mechanical processing,granite rulers are used to measure the size,length,width,and height of workpieces to ensure that the processing dimensions meet the design requirements.They can be used to measure the outer dimensions of parts,the size of holes,and the distance between different surfaces.For example,when processing a precision shaft,a granite ruler can be used to measure the diameter and length of the shaft to ensure its dimensional accuracy.

Metrology and Quality Inspection:In metrology laboratories and quality inspection departments,granite rulers are used as standard measuring tools to calibrate other measuring instruments,such as calipers,micrometers,and height gauges.They can also be used to directly measure the size of precision parts to check whether the parts meet the quality standards.For example,in the production of aerospace-grade parts,granite rulers are used to ensure the accuracy of part dimensions to meet the high-reliability requirements of aerospace equipment.

Optical and Electronic Industries:In the optical and electronic industries,granite rulers are used in the manufacturing and measurement of precision optical components and electronic components.For example,when manufacturing optical lenses,granite rulers are used to measure the diameter,thickness,and curvature radius of the lenses to ensure their optical performance.In the production of semiconductor wafers,granite rulers are used to measure the size and alignment accuracy of the wafers to ensure the accuracy of the integrated circuit manufacturing process.