Cast Iron Measuring Plate

The Durable,Stable Datum for Direct Metrology

The Cast Iron Measuring Plate is a precision-ground and scraped reference surface engineered specifically to serve as the primary,stable datum for direct-contact measurement,comparative gauging,and precision layout in workshop and inspection environments.It combines the inherent damping and rigidity of cast iron with a finely finished plane to facilitate accurate dimensional verification.

Defined by Metrological Function

Purpose-Built for Measurement:Unlike general work tables,its primary design intent is to provide an accurate,accessible reference plane from which measurements are taken using height gauges,dial indicators,surface straightedges,and other manual metrology tools.

Optimized for Stability&Repeatability:The mass and structural damping of cast iron minimize vibration and ensure the plate itself does not introduce error during measurement cycles,providing consistent,repeatable results.

Thermally Adaptive:Its thermal conductivity allows it to stabilize quickly to ambient shop temperature,reducing thermal gradients that can affect measurement accuracy over time.

Precision Surface&Construction

Scraped or Precision-Ground Finish:The surface is finished to a precise flatness tolerance.A hand-scraped finish is traditional,providing micrometer-scale bearing points ideal for moving measuring stands smoothly and reducing stiction.A ground finish offers an excellent,cost-effective alternative for many applications.

Heavy-Duty,Ribbed Construction:Features a rigid,ribbed underside to prevent flexing under the weight of components and measuring equipment,ensuring the surface plane remains true.

Functional Design:Typically includes clear edge faces machined square to the surface for establishing datums,and may feature threaded inserts or edge T-slots for light fixture anchoring(while keeping the central measuring area clear).

Sized for Measurement Tasks:Offered in sizes that accommodate typical components and the working range of stand-mounted measuring instruments,making it a dedicated station for inspection.

Core Applications in Measurement

Manual Inspection&Layout:The fundamental platform for using a height gauge with a scriber or probe to check feature locations,dimensions,and profiles directly on a workpiece.

Comparative Gauging:Serves as the reference plane for setting a dial indicator to zero on a master part,then comparing production parts for deviation.

Flatness&Parallelism Verification:Used in conjunction with a dial indicator mounted on a stand to map the flatness of a part's surface or check parallelism between features.

Toolroom&Quality Control Station:Acts as the central,dedicated surface in a QC booth or toolroom for first-article inspection,part validation,and precision layout work.