Mitutoyo Groove Micrometer No.146-221

Description

The Mitutoyo 146-221 is a specialized groove micrometer designed for precise measurement of small internal grooves, recesses, and lands where standard micrometers cannot reach. With a 0–25mm measuring range and specially shaped measuring faces, this tool allows accurate gauging of narrow internal features in precision machined components. Manufactured in Japan, it’s built to the same high standard as Mitutoyo’s broader micrometer range, offering long-term accuracy and reliability.

This unit is used and in good working condition, with smooth spindle movement and clean anvils. It is ideal for toolmakers, machinists, and QA professionals who need reliable measurements of hard-to-access internal geometries.

Specifications:

• Brand: Mitutoyo
• Model: 146-221
• Type: Groove micrometer
• Measuring range: 0–25mm
• Graduation: 0.01mm
• Accuracy: ±3µm
• Measuring faces: Pointed for internal groove measurement
• Spindle: Ratchet stop for consistent pressure
• Condition: Used – fully functional, no box
• Origin: Made in Japan
• Applications: Measuring internal grooves, recesses, and lands in precision machined parts