Spi 63-373-5 Precision-ground Steel Angle Plate 4x4x4

Product Description

The SPI 63-373-5 is a precision-ground steel angle plate designed for use in machining, inspection, and layout operations requiring accurate 90-degree reference surfaces. Measuring 4 inches wide, 4 inches deep, and 4 inches high, this stepped, open-end plate features a squareness tolerance of 0.0005 decimal inch, making it suitable for tight-tolerance setups. Machined holes on the plate surface allow for clamping, fixturing, and workpiece attachment. The plate is manufactured from steel with a precision-ground finish for consistent flatness and surface integrity. It is installed and used by machinists, toolmakers, and precision metrology technicians in shop and inspection environments.

This angle plate is suited for use on surface plates, mill tables, and inspection benches where a rigid, square reference is required. The stepped design provides multiple clamping surfaces and reference faces, increasing setup flexibility for a range of workpiece geometries. The open-end configuration allows workpieces to extend through or beyond the plate during fixturing. Applications include vertical milling setups, CMM fixturing, layout work, and part inspection. No specific compatible machines or systems were named in the product data.

Key Features

• Precision-ground finish with squareness tolerance of 0.0005 decimal inch for tight-tolerance setups
• Stepped plate design provides multiple reference and clamping surfaces
• Open-end configuration accommodates workpieces that extend beyond the plate
• Machined holes on the plate surface for secure clamping and workpiece attachment
• Steel construction for rigidity and durability in shop and inspection environments

Compatibility

Designed as a general-purpose precision angle plate for use on surface plates, mill tables, and inspection benches in machine shop and metrology applications.

Installation Notes

Setup and use of this angle plate is performed by machinists or toolmakers. Ensure the mounting surface is clean and free of burrs or debris before placing the plate to maintain squareness accuracy. Secure workpieces and fasteners per the requirements of the machining or inspection operation. Verify squareness to the reference surface with a dial indicator before beginning critical operations.