Starrett 52503 Blade Micrometer 2 to 3 Inches Mechanical

Product Description

The STARRETT 52503 is a mechanical blade micrometer designed for measuring in tight grooves, slots, keyways, and other restricted spaces where standard anvil micrometers cannot reach. Its measuring range spans 2 to 3 inches with a graduation of 0.001 inches, providing the resolution machinists and metrologists need for precision work. The blade-style anvil and spindle are machined from rigid steel with a satin chrome finish for durability and corrosion resistance. A speeder thimble allows for quick, easy adjustment without sacrificing measurement accuracy. This tool is used by machinists, toolmakers, quality control technicians, and skilled trades professionals who require close-tolerance measurement in confined geometry.

The 52503 is suited for shop-floor and inspection-room use in manufacturing, tooling, and machining environments. Its blade thickness of 1/32 inches and blade depth of 5/16 inches allow access to narrow recesses that conventional outside micrometers cannot contact. The mechanical operation requires no batteries or electronics, making it reliable in oily or harsh shop conditions. A wrench is included for spindle lock and adjustment tasks.

Key Features

• Blade thickness of 1/32 inches (0.79 mm) for access to narrow grooves and slots
• Blade depth of 5/16 inches (7.94 mm) for reach into recessed features
• Speeder thimble for fast spindle travel and quick adjustment
• 0.001-inch graduation for precise mechanical readout
• Rigid steel anvil and spindle with satin chrome finish for durability
• Includes wrench; no batteries required

Compatibility

Designed as a standard outside blade micrometer for general precision measurement applications requiring a 2 to 3 inch range.

Installation Notes

Blade micrometers are used by machinists and quality control technicians and require no installation in the traditional sense. Before use, clean the blade anvil and spindle faces and verify the zero setting with a calibrated standard. Store in the provided case when not in use to protect the blade geometry and satin chrome finish. Calibration intervals should follow the requirements of the applicable quality management system or shop standards.