Spi 63-372-7 Steel Precision-ground Angle Plate 3x3x3

Product Description

The SPI 63-372-7 is a precision-ground steel angle plate used for accurate workholding and layout work in machining, inspection, and fabrication environments. Measuring 3 inches wide by 3 inches deep by 3 inches high, this compact angle plate features a stepped plate style with an open end design. The surfaces are precision-ground to a squareness tolerance of 0.0005 decimal inch, making it suitable for applications where tight angular accuracy is required. Machined holes on the plate surface allow for clamping, fixturing, or securing workpieces directly to the plate. It weighs 2.5 pounds and is constructed entirely of steel.

This angle plate is intended for use in machine shops, tool rooms, and inspection departments. It is commonly used to hold workpieces square to a surface plate, mill table, or grinding chuck during precision layout, drilling, milling, or surface grinding operations. The stepped design provides multiple reference surfaces for versatile fixturing setups. At 3 inches in each dimension, it is sized for smaller workpieces or compact setups where a full-size angle plate would be impractical. Machinists, toolmakers, and quality technicians are the typical users of this type of tooling accessory.

Key Features

• Precision-ground surfaces with squareness tolerance of 0.0005 decimal inch for accurate angular reference
• Stepped plate style provides multiple reference datum surfaces in a single unit
• Open end design allows workpieces or fixtures to extend beyond the plate boundary
• Machined holes on plate surface for clamping and workpiece fixturing
• All-steel construction for rigidity and long-term dimensional stability
• Compact 3 inches x 3 inches x 3 inches footprint suited for small-part work

Compatibility

Designed as an OEM-style precision tooling accessory compatible with standard surface plates, mill tables, and grinding fixtures where a square angular reference is required.

Installation Notes

Angle plates are typically set up by machinists or toolmakers on a surface plate or machine table. Before securing a workpiece, ensure the mounting surface is clean and free of chips or burrs that could affect squareness. Use appropriate clamps or bolts through the machined holes to secure workpieces, and verify angular accuracy with a dial indicator before beginning any machining or inspection operation. Handle with care to avoid nicking the precision-ground surfaces.