Granite V-frame National Machinery Industry Standard: JB/T10027-99 Manufacturing

Granite type frame
Granite type frame
It is suitable for precision inspection, precision measurement, precision marking and positioning work in the mechanical processing and parts manufacturing industries. It is the best tool for detecting cylinders. Ideal tool.
Product details
Granite type frame
Suitable for precision inspection, precision measurement, precision scribing and positioning in the mechanical processing and parts manufacturing industries. It is a detection cylinder ideal tool.
Alias: Granite precision frame, granite block, marble frame, marble block
Material: Made according to the national machinery industry standard: B/-.
Accuracy: Grade-Grade
Advantages: Made by fine grinding by hand, it has high precision, long life, acid and alkali resistance, not easy to deform, no rust, acid and alkali resistance, non-magnetization, no deformation, and resistance to Good grindability and other advantages. Can remain stable under heavy load and normal temperature. Granite frame is a precision reference measurement tool made of natural stone materials. It is an ideal reference surface for the inspection of instruments, precision tools, and mechanical parts, especially for high-precision measurements. It is made from high-quality underground rock layers. After hundreds of millions of years of natural aging, its shape is extremely stable. There is no need to worry about deformation due to regular temperature differences. Granite materials that have undergone rigorous physical testing and selection have fine crystallization and hard texture. Since granite is a non-metallic material, it has no magnetic reaction and no plastic deformation. It has high hardness and therefore good accuracy retention. Even if it is bumped by heavy objects during use, at most a few stones will fall off. It is superior to precision measurement reference parts made of high-quality cast iron and steel, and can achieve high and stable accuracy. The marble blocks produced by our company can still maintain their original accuracy after being stored for one year.
Specification table (the geometric tolerance in the table refers to the flatness of the bottom surface and the parallelism of the groove axis to the bottom surface)
Specifications
Working surface flatness
Groove to bottom surface Parallelism
Parallelism of the groove to the side surface
Symmetry of the groove to both sides
Symmetry of the groove side to the end surface
Verticality of the groove side to the bottom surface
1 Height difference between the molded block and the bottom surface
Accuracy level
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For details, please contact the sales department hotline of Botou Chengyi Precision Measuring Instrument Factory:-: