The core selling points of this granite right angle ruler include its ultra-high measurement accuracy and durable structure. It is processed from integral granite blocks without splicing, avoiding the error caused by combined assembly. The working edge undergoes precision grinding and lapping treatment to ensure zero burrs and stable dimensional accuracy. It adopts a thickened base design to improve the standing stability during use, and the surface is treated with anti-oxidation coating to prevent corrosion from workshop oil stains and dust. Each product is strictly tested before leaving the factory to ensure that the square error meets the 00-grade standard, which can meet the precision angle measurement needs of high-end manufacturing industries.
Specific parameters of this granite right angle ruler are as follows: material is natural deep-mine granite with a density of 2.6g/cm³; accuracy grade is 00 level, square error is less than 0.5μm per meter; total size is 500mm (height) ×350mm (width) ×50mm (thickness); total weight is 8kg; surface roughness is Ra0.8μm; it comes with a fixed mounting hole for easy installation on workbenches; packaging uses shockproof foam and wooden box to protect the precision working edge during transportation; each product is equipped with a factory calibration report for traceable measurement.
This granite right angle ruler is mainly used in automobile manufacturing, hardware machining, mold production, and instrument calibration industries. It can be used to detect the right angle of mechanical parts, verify the parallelism of machine tool guide rails, calibrate other right angle measuring tools, and inspect the assembly accuracy of precision equipment. It is especially suitable for high-precision processing workshops with strict requirements for angle measurement accuracy, replacing traditional steel right angle rulers that are prone to deformation and rust.
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