What Is A Granite Surface Plate Used For

Aa this is a laboratory grade granite surface.

What is a granite surface plate used for.

Laboratory grade aa plates are for precision quality control work. Solid granite surface plate and angle plates are used for precision layout inspection and tooling setup. The bottom side of the plate has several stiffening ribs and there are two handles on either side which are used to lift and shift the surface plate. Granite surface plates are considered the more superior material compared to cast iron surfaces.

Toolroom grade b plates are for checking work throughout a shop. Read full article here. The foundation of precision measurement is the surface plate. 18 x 12 x 3 1 2 h.

The granite used for surface plates has an excellent distribution of hard quartz which provides a smooth long wearing working surface. Inspection grade a plates are for general quality control work. The surface plate is a massive solid structure highly rigid in design which is having a true flatness of the surface. Granite surface plates meet or exceed federal specifications ggg p463.

Construction of surface plate required material properties to make materials used to make surface plates cast iron surface plate granite surface plates glass surface plates. Our granite surface plates are manufactured in three ledge types as well as standard sizes and grades. The granite used in a granite surface plate is graded by quality with these four levels of quality. Surface plates come in grades of a aa b and ht200 for different applications.

Used granite surface plates 142 listings. Granite 0 ledge 48 x 36 x 6 precision surface plate w adjustable steel stand. A this is an inspection grade granite surface. A surface plate is a solid flat plate used as the main horizontal reference plane for precision inspection marking out layout and tooling setup.

Final inspection and calibration of every surface plate is accomplished by use of the auto collimeter. Plates that have ledges are used for clamping purposes only. As the name suggests a surface plate refers to a plate having a perfectly flat surface which is manufactured out of cast iron normally having a rectangular shape. All of the granite we use has been carefully measured to establish the modulus of elasticity allowing us to comply and exceed federal specifications and user requirements.

B this is a toolroom grade granite surface. The surface plate is often used as the baseline for all measurements to a workpiece therefore one primary surface is finished extremely flat with tolerances below 11 5 μm or 0 0115 mm per 2960 mm for a grade 0 plate. Granite surface plate 18 x 24 granite surface plate 18 x 24 kentwood mi usa. Use grade aa laboratory plates for precision operations in constant temperature gaging rooms and metrology departments.