Precision Granite V-Block Pair

Product features:

The core advantages of this granite V-block pair lie in its high positioning accuracy and durable performance. The V-groove is processed by precision CNC grinding and lapping technology to ensure that the groove angle error is within 1 arc second, and the parallelism between the two V-blocks is less than 0.2μm. The surface of the V-block is treated with anti-static coating to avoid adsorption of workshop dust and improve the cleanliness of the measuring surface. Each pair of V-blocks is matched and calibrated one by one to ensure consistent positioning accuracy, and the bottom is equipped with non-slip rubber pads to improve stability during use.

Product specifications:

Specific parameters of this granite V-block pair include: material is natural volcanic granite with a density of 2.65g/cm³; groove angle is 90° with an error of ≤1 arc second; applicable holding diameter range is 50mm to 150mm; flatness tolerance of the working surface is Grade 0; parallelism between the two V-blocks is ≤0.2μm; each single V-block size is 150×100×100mm, total weight of a pair is 3.5kg; surface roughness of the working groove is Ra0.8μm; packaging uses anti-shock foam and wooden box to avoid damage during transportation.

Product application:

This granite V-block pair is mainly used in shaft part processing, bearing manufacturing, gear machining, and instrument calibration industries. It can be used to fix cylindrical parts for concentricity inspection, parallelism detection of shaft parts, length measurement of workpieces, and calibration of other clamping tools. It is especially suitable for high-precision machining workshops that require stable positioning and accurate measurement, replacing traditional cast iron and steel V-blocks that are prone to rust and deformation.