Starrett 51461 Beveled Straight Edge 72 in Steel

Product Description

The STARRETT 51461 is a single-bevel straight edge precision layout and inspection tool machined from steel. It measures 72 inches in length, 3-5/32 inches in width, and 9/32 inches in thickness, with a certified edge flatness of 0.0004 inches and parallelism of 0.0024 inches. The beveled edge provides a precise reference line for scribing, checking surface flatness, or verifying straightness across long workpieces. Machinists, toolmakers, pipefitters, and fabricators rely on this tool when accurate alignment or layout is required over extended spans. Its steel construction offers the rigidity and dimensional stability needed for demanding shop and field conditions.

This straight edge is suited for use in machine shops, fabrication facilities, and precision layout applications where a long, reliable reference surface is required. It is commonly used to check flatness on large machine beds, verify alignment of structural members, and perform scribing operations on plate stock. The 72-inch length makes it appropriate for applications that shorter rules or shorter straight edges cannot effectively span.

Key Features

• Edge flatness of 0.0004 inches for precision layout and inspection work
• Parallelism of 0.0024 inches across the full length
• Single beveled edge for accurate scribing and alignment reference
• 72-inch length spans large workpieces and machine surfaces
• Steel construction for rigidity and long-term dimensional stability
• 9/32-inch thickness provides resistance to flex during use

Compatibility

Designed as a general-purpose precision straight edge for use in machine shop, fabrication, and industrial layout applications requiring a 72-inch reference tool.

Installation Notes

Handle with clean, dry hands or lint-free gloves to prevent corrosion from skin oils on the precision ground surface. Store horizontally or vertically in a protected location to prevent warping or edge damage. Inspect the reference edge for nicks or burrs before each use, as contact damage can affect accuracy. Cleaning and light oiling after use will extend the service life of the steel surface.