Spi 13-687-9 Bevel Protractor Stainless Steel

Product Description

The SPI 13-687-9 is a precision bevel protractor designed for accurate angle measurement in machining, fabrication, and layout work. It reads a full 360 degrees with an accuracy of 5 minutes of arc and features a dial graduation of 0-90-0, giving technicians a clear, repeatable reading across the full measurement range. The protractor accepts three interchangeable blade lengths of 6, 8, and 12 inches, allowing it to handle a wide variety of workpiece sizes. The body and blade are constructed from stainless steel for corrosion resistance and long service life. An acute angle attachment is included in the package.

This bevel protractor is suited for metalworking shops, tool rooms, and precision layout environments where reliable angle measurement is required. It is commonly used by machinists, tool and die makers, welders, and sheet metal fabricators when setting up cuts, verifying joint angles, or laying out complex geometry on workpieces. The three included blade lengths make it adaptable to both small parts and larger structural measurements without the need for additional tooling.

Key Features

• Full 360-degree measurement range for complete angular coverage
• Accuracy to 5 minutes of arc for precision layout and inspection
• Dial graduation of 0-90-0 for straightforward reading in any quadrant
• Three blade lengths included: 6 inches, 8 inches, and 12 inches
• Stainless steel construction for durability and corrosion resistance
• Acute angle attachment included for measuring inside angles

Compatibility

Designed as a general-purpose bevel protractor for use in precision machining, fabrication, and layout applications requiring angular measurement up to 360 degrees.

Installation Notes

This instrument requires no installation. Before use, verify the blade is fully seated and locked to prevent measurement error. Keep the contact surfaces clean and free of burrs or chips that could affect accuracy. Store in a protective case when not in use to preserve calibration and prevent damage to the blade edges.