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What are the specifications of surface plate?

What are the specifications of surface plate?

PRECISION CAST IRON SURFACE PLATES – SPECIFICATIONS

SIZE (mm) GRADE “0” WEIGHT (kg)
300 x 300 4.0 21
400 x 400 4.5 50
450 x 300 4.0 39
450 x 450 4.5 62

How many types of surface plates are there?

Two types of surface plates can be used: a granite surface plate or a cast iron surface plate.

What are the grades of surface plates?

The highest accuracy plates are called Grade AA, and they are often found in calibration laboratories. Grade B plates are the lowest accuracy plates, and they might be found on shop floors. The middle grade plates, Grade A, are often used in inspection areas.

What is a grade AA surface plate?

Grade AA (Laboratory Grade) surface plates are made to the best tolerance of flatness and repeatability. These AA plates are thicker than lesser grade plates, so they have less deflection and are intended for permanent installation.

What is the accuracy of surface plate?

Apart from the given height map, some meaningful characteristic parameters: sphericity, torsion and waviness are obtained. They have been proven very valuable to record long term effects of surface plates. Reliable measurements with an accuracy of 0.1 μm/m demonstrate the capabilities of the method.

What is surface plate in metrology?

Surface plates are flat and plane surface used as a horizontal reference space for dimensional measurement, it’s a base for inspection, toolmaking, gauging, spotting, marking, and layout. They can be made from granite, metal, cast iron, or glass.

What is surface gauge?

Definition of surface gauge 1 : a scriber mounted in an adjustable stand for marking off castings or testing the accuracy of plane surfaces and used with a surface plate. 2 : a gauge for measuring ordinates of points on a surface of the work from a reference plane.

Why are surface plates used?

What is a grade 0 surface plate?

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.

How flat is a surface plate?

What is the purpose of a surface plate?

A surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out (layout), and tooling setup.