Starrett 52497 V Anvil Micrometer 0.078 to 1 Inch 5 Flute

Product Description

The STARRETT 52497 is a mechanical V anvil micrometer designed to measure the diameter of cutting tools with 5 flutes. It reads from 0.078 to 1 inch with a graduation of 0.0001 inch, making it suitable for high-precision inspection work. The V-shaped anvil cradles the tool while the carbide spindle contacts the opposing flute. A ratchet stop thimble ensures consistent measuring pressure, eliminating operator-to-operator variation. The satin chrome finish reduces glare under shop lighting. Machinists, tool-and-die makers, and quality-control technicians use this instrument for verifying tap, reamer, and end mill geometry.

The 52497 is used in machine shops, tool rooms, and manufacturing environments where 5-flute cutting tools must be measured accurately. The V anvil geometry positions the tool so that the spindle contacts the cutting edge directly opposite the valley between two flutes, giving a true outer-diameter reading. It is appropriate for both incoming inspection of new tooling and wear monitoring of tools in service.

Key Features

• Measurement range of 0.078 to 1 inch covers common 5-flute end mill and reamer sizes
• 0.0001 inch graduation for high-precision diameter readings
• Carbide anvil and carbide spindle resist wear and maintain accuracy over extended use
• Ratchet stop thimble delivers consistent contact pressure for repeatable measurements
• V anvil geometry engineered specifically for 5-flute cutting tool measurement
• Satin chrome finish reduces glare and resists corrosion

Compatibility

Designed for measuring 5-flute cutting tools such as taps, reamers, and end mills with an outer diameter between 0.078 and 1 inch.

Installation Notes

This instrument requires no installation. Before use, clean the anvil and spindle faces with a lint-free cloth and verify the zero setting against a known standard. Store the micrometer in its case with the spindle slightly open to prevent spring fatigue. Calibration should be performed by a qualified metrologist according to your facility's quality system requirements.