B GRADE 4-LEDGE GRANITE SURFACE PLATES
B-Grade Black Granite Surface Plates with 4-Ledges are flat surfaces used in metrology, inspection, and machining applications. These plates are made of high-quality black granite, which is a natural stone known for its excellent stability, stiffness, and wear resistance.
The term "4-Ledges" refers to the fact that these surface plates have raised edges or lips along each side of the plate. These ledges provide a secure and stable platform for measuring and inspecting smaller workpieces, and are often used for clamping workpieces to the granite.
B-Grade Black Granite Surface Plates with 4-Ledges are manufactured to standards and undergo quality control processes to ensure that they meet acceptable levels of accuracy and flatness. The term "B-Grade" refers to the accuracy of the surface plate, which is achieved by lapping the surface to within 30 microns over the entire surface area.
These surface plates are typically used as reference surfaces for measurement instruments such as micrometers, height gauges, and dial indicators. They can also be used as a flat surface for marking out and inspecting machined parts.
B-Grade Black Granite Surface Plates with 4-Ledges are available in a range of sizes, from small handheld plates to large floor-mounted plates that can weigh several tons. They are typically black in color, but some manufacturers offer other colors such as pink, gray, and green. These plates are often preferred over other materials such as steel or cast iron due to their superior stability and resistance to wear and corrosion.
While B-Grade Black Granite Surface Plates with 4-Ledges are less accurate than A-Grade or AA-Grade plates, they are still suitable for many applications where a high level of accuracy is not required. They offer good value for money and can be a cost-effective option for applications where tight tolerances are not critical. The absence of ledges also makes them easier to use for larger or irregularly shaped workpieces.
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