Spi 13-636-6 Bevel Protractor 12 Inch Blade

Product Description

The SPI 13-636-6 is a bevel protractor designed for precise angular measurement in machining, fabrication, and layout work. The tool features a 12-inch blade and a round-head dial that reads from 0 to 180 degrees, giving technicians and machinists the range needed for both acute and obtuse angle verification. The blade uses a 4R graduation style, which provides four sets of markings for flexible reading. At 3 pounds, the instrument has enough mass for stable placement on workpieces without being cumbersome. This type of precision tool is used wherever accurate angular relationships must be confirmed before cutting, grinding, or assembling components.

Bevel protractors like the 13-636-6 are standard equipment in machine shops, sheet metal fabrication facilities, tool and die operations, and maintenance departments. The 12-inch blade length accommodates a wide range of part sizes and surface spans. The 0-to-180-degree dial covers the full range of interior and exterior angles encountered in typical trade and manufacturing applications. Trades that commonly rely on this instrument include machinists, pipefitters, millwrights, and precision layout workers who require repeatable, readable angular measurement during setup and inspection.

Key Features

• 12-inch blade length for measuring larger surfaces and longer spans
• 0 to 180 degree dial reading covers full angular range for interior and exterior angles
• Round head design for stable contact and consistent positioning on workpieces
• 4R blade graduation style provides multiple sets of markings for flexible, precise reading
• Minimum angle measurement starts at 0 degrees for full-range versatility
• Solid construction at 3 pounds for stable, drift-free placement during measurement

Compatibility

Designed as a general-purpose bevel protractor suitable for machine shop, fabrication, and precision layout applications requiring angular measurement up to 180 degrees.

Installation Notes

This is a hand-measurement instrument, not an installed component. Handle the blade and dial with care to avoid impact damage that can affect calibration accuracy. Store in a protective case when not in use to prevent blade wear and dial damage. Verify calibration periodically against a known reference angle, especially before critical layout or inspection tasks.