62-75mm 2.44-2.95" Three Point Internal Bore Micrometer - 3227 Series (Insize)

The Insize 3227 Internal 3-point bore micrometer is a precision tool designed for accurate inside-diameter measurements. Its three-point contact delivers stable, repeatable readings, making it ideal for engineers, machinists, and quality-control staff who work with tight bore tolerances.

Designed for bore sizes from 62 to 75 mm (2.44–2.95 in) and capable of measuring up to 300 mm, this micrometer features carbide measuring faces for wear resistance and a ratchet stop to ensure constant measuring pressure. It is graduated in 0.005 mm increments and comes supplied with a setting ring to simplify zeroing and repeat measurements.

• Three-Point Contact for Stable Readings: The three-point contact design distributes pressure evenly, improving repeatability and reducing measurement variance across bores.
• Durable Carbide Faces with Ratchet Stop: Carbide measuring faces resist wear for long tool life, while the ratchet stop provides consistent pressure and protects accuracy over many cycles.
• Wide Range, Fine Graduation, and Included Setting Ring: Measures up to 300 mm with 0.005 mm increments, and the included setting ring lets you zero quickly for fast, repeatable results.

This bore micrometer helps you speed up inspection and maintenance workflows by delivering reliable, repeatable inside-diameter measurements. Its rugged construction and precise graduations translate into tighter tolerances, fewer reworks, and more confident decisions in busy production environments.