Marble ruler

Marble level ruler,also known as granite level ruler or rock level ruler,is made of Jinan green stone material through mechanical processing and manual precision grinding.It has the advantages of long service life,low deformation,and is suitable for inspection,measurement,and marking work in the mechanical processing and component manufacturing industries.Accuracy:Level 000-1.Executive standard:GB4987-85.

Use of marble ruler:to measure the straightness and flatness of workpieces and install equipment.The flatness and straightness of the machine tool workbench,guide rail,and work.

The material of the marble ruler is Jinan blue,and the marble ruler has a black luster,structure,uniform texture,good stability,and high strength,.A marble ruler is a benchmark measuring tool made of stone materials,which is an ideal reference plane for the inspection of instruments,tools,and mechanical components,especially for measurement purposes.

The marble ruler is taken from the underground rock layer,and after billions of years of natural aging,its shape is extremely stable,so there is no need to worry about deformation due to conventional temperature differences.

The marble flat ruler is a granite material that has undergone strict physical testing and selection,with fine and dense crystals and a hard texture.Due to the non-metallic nature of granite,there is no magnetic reaction or plastic deformation.Therefore,the accuracy retention is good.

Even if a rock tool is hit by a heavy object during use,a marble ruler can only drop a few pieces of stone debris at most.Marble rulers are superior to measuring reference parts made of cast iron and steel,and can achieve high and stable accuracy.The marble ruler produced by our company can still maintain its original accuracy after being left unused for a year.

Characteristics and advantages of marble rulers:

1.After long-term aging,the rock has a uniform organizational structure,coefficient of expansion,disappearance of internal stress,and no deformation.

2.Good rigidity,strong.

3.Not afraid of acid and alkali erosion,not prone to rust,does not require oil,is not prone to sticking fine dust,maintenance is convenient and simple,and has a long service life.

4.There will be no scratches,not hindered by constant temperature conditions,and the temperature measurement accuracy can be maintained at room temperature.

5.Non magnetized,able to move smoothly during measurement,without any stagnation,unaffected by moisture,and with good flatness.

Physical properties of marble ruler:specific gravity:2970-3070kg/㎡,compressive strength:245-254N/m㎡,strong grinding amount:1.27-1.47N/m㎡,linear expansion coefficient:4.6×10-6℃,water absorption rate:0.13%,Shore strength:HS70 or above.

Model and specifications of marble ruler: