Starrett Toolroom Granite Surface Plate, 24"X36"X6", Grade B Inspection

The Starrett granite surface plate is a precision toolroom instrument designed for quality control applications, offering exceptional wear resistance. It features a grade B (inspection grade) classification, suitable for general work in quality control environments. The surface plate measures 24 inches by 36 inches (600mm x 900mm) with a thickness of 6 inches (150mm). It is constructed from toolroom-grade granite, known for its superior durability compared to other materials. The plate maintains a flatness tolerance of .000200 inches (0.0050mm), ensuring high precision in measurement tasks. Weighing 495 pounds, this surface plate is produced without ledges, providing a smooth and uninterrupted working surface. Despite minor edge chips, it remains ideal for precision work.