Jinan Fortune Precision Machinery Co., LTD is a pioneer & leading manufacturer of Granite Equipments of very high accuracy like Granite Surface Plate, Granite Tri Square, Granite Straight Edge, Granite Parallel and Granite Cube. Other products include Cast Iron Products such as Box Angle Plate, Surface Plate, Bed Plate, Angle Plate, Tri Square, Light Weight Straight Edge and more.
We are the first and largest companies in manufacture precision granite products.
Fortune Granite Surface plates are very lowest thermal co-efficient of expansion, greater strength, 100% rust proof. It may Chip but not develop a burr, non magnetic, non - conductive, easy clean, three times harder than that of cast Iron surface plate. built in accuracy of flatness over years. Fortune Granite surface plates acrystalline rock has made from selected granites with uniform distribution of dark and light constituents. Some of the physical properties of granites are 6 to 6.5 Moss scale hardness, fine grind texture, 3.08specific gravity, 2 to 5 x 10-6 k1 thermal co-efficient of expansion.
Fortune Granite surface plates are meets to IS Specification and tolerances, surface plates are inspected under laboratory atmosphere conditions, final inspection carried out by high precision electronic level with computerized software methods.
Fortune surface plates are manufactured in four grades of Accuracy. Namely Grade 00, 0, I, II, III. The flatness deviation of a local area of 250x250mm of working surface shall not exceed 3.0 pm of Grade 00, 3.5pm of Grade 0, 7.0µm of Grade I, 15.0µm of Grade II
Calibration Certificate is supplied with each plate as per Is Specification. We offer bigger size of granite surface plate with extra thickness, Granite surface plates with T slots, granite comparator stand, inserts with drilled and tapped holes .also we undertake rectification and calibration of surface plates, Bench centre, Angle plate, Comparator stand , Gear rolling tester and calibration of all mechanical measuring instruments.
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