Spi 77-633-6 Beveled Straight Edge 36 Inches Spring Steel

Product Description

The SPI 77-633-6 is a single-bevel straight edge designed for precision layout, inspection, and surface verification work. Measuring 36 inches in length, 2-13/32 inches wide, and 3/8 inch thick, it delivers edge flatness of 0.0008 inches (15 micrometers) and parallelism of 0.0016 inches (30 micrometers). Constructed from spring steel, the blade resists flex and wear under shop conditions. Machinists, tool-and-die makers, and precision layout technicians use this type of straight edge to verify flatness, scribe lines, and check surface accuracy on machine tables, castings, and fabricated components.

This straight edge suits precision measurement and layout tasks in machine shops, fabrication facilities, and quality control environments. The beveled edge allows close contact with workpiece surfaces for accurate flatness checks and scribing operations. It is appropriate for both bench use and in-process inspection on medium to large workpieces where a 36-inch reference edge is required.

Key Features

• Single beveled edge for precise surface contact and scribing
• Edge flatness of 0.0008 inches (15 micrometers) for accurate inspection work
• Parallelism of 0.0016 inches (30 micrometers) across the blade
• Spring steel construction for rigidity and resistance to deformation
• 36-inch length accommodates medium to large workpieces and surfaces

Compatibility

Designed as a general-purpose precision straight edge suitable for use in machine shop layout, surface plate inspection, and fabrication verification applications requiring a 36-inch beveled reference edge.

Installation Notes

Handle precision straight edges with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store flat or in a protective case to avoid warping or edge damage. When using for surface verification, ensure the reference surface and the straight edge are both clean and free of burrs or debris before contact. Periodic cleaning and light oiling will maintain the spring steel blade against rust.