150-175mm 5.91-6.89" Three Point Internal Bore Micrometer - 3227 Series (Insize)

The Insize 3227 Three-Point Internal Bore Micrometer is a precision tool designed for accurate internal bore measurements. Its three-point contact and carbide measuring faces deliver reliable readings with repeated use, even in demanding inspection environments.

With a measurement range up to 300 mm and a fine 0.005 mm graduation, this micrometer accommodates a wide variety of bore sizes. It includes two interchangeable jaw sets for different measuring ranges, extension rods for reaching deeper bores, a ratchet stop for consistent measuring pressure, and an optional setting ring (code 6312) for fast, repeatable setups.

• Carbide measuring faces: Provide exceptional wear resistance, extending tool life and maintaining measurement accuracy in tough bore conditions.
• Interchangeable jaws for multiple bore ranges: Two jaw sets let you adapt quickly to different bore sizes without swapping instruments, improving workflow.
• Ratchet stop and extension rods for consistent, flexible measurements: The ratchet stop ensures repeatable pressure for reliable readings, while extension rods enable access to deeper or hard-to-reach bores.

This durable internal bore micrometer is suited for engineers, machinists, quality inspectors, and hobbyists who require dependable, repeatable bore measurements. Its robust construction and versatile accessories help streamline calibration, inspection, and final assembly tasks, delivering accurate results with less rework.