40-50mm 1.57-1.97" Three Point Internal Bore Micrometer - 3227 Series (Insize)

The Insize 3227 Series Three-Point Internal Bore Micrometer is a precision tool designed to measure inside diameters with confidence. Its three-point contact and carbide measuring faces deliver stable, repeatable bore readings, making it a reliable choice for engineers, machinists, and quality inspectors.

With a measurement range up to 300 mm and a fine 0.005 mm graduation, this micrometer provides quick, consistent results across a wide range of bores. A ratchet stop ensures consistent pressure, and a setting ring is included for fast, repeatable calibration between parts and setups.

• Three-point measurement system: Contacts the bore at three points to average out minor misalignments, delivering stable, repeatable readings and reducing measurement error.
• Carbide measuring faces: Enhances wear resistance for long service life and maintains measurement accuracy even after frequent use in tougher or dirty bore environments.
• Ratchet stop with setting ring: Provides controlled, consistent contact pressure for reproducible results, while the included setting ring speeds up calibration between jobs.

Whether you’re performing routine QC checks, in-process gauging, or precision assembly, this bore micrometer helps you work faster and with greater confidence. Its durable construction, clear graduations, and reliable performance support tighter tolerances, reduced downtime, and consistent results across production runs.