Mitutoyo 300-1500mm Tubular Inside Micrometer

Description

Product Overview

The Mitutoyo Series 137 (likely Model 137-205) is a heavy-duty Tubular Inside Micrometer (Extension Rod Type) designed for measuring large internal diameters such as cylinders, pipes, and internal frames.

Unlike standard calipers which can flex over long distances, this system uses a micrometer head combined with a series of rigid, interchangeable extension rods to build up the exact length required.

• Tubular Design: The extension rods are housed in protective sleeves (tubes), which provide the rigidity of a solid rod but with reduced weight and thermal protection.
• Capacity: This set covers a massive range (typically 300mm – 1500mm for the full kit), making it capable of measuring everything from big engine bores to large industrial pipework.
• Carbide Faces: The measuring anvils are carbide-tipped to prevent wear, ensuring accuracy is maintained even after measuring abrasive cast iron.

Condition

Used (Beautiful / Lightly Used).

This set is in beautiful condition. It appears to have seen very little use (“lightly used”), with the finish on the micrometer head and rods looking clean and bright. It comes complete in its original wooden storage case, with all extension rods, anvils, and the adjustment wrench present and securely stored.

Brand Information

Mitutoyo Corporation (est. 1934) is the global benchmark for dimensional metrology. Their Series 137 Extension Rod micrometers are the standard for large-diameter internal measurement, known for their ability to maintain linearity over 1.5 metres where other gauges would sag or flex.

Specifications

Keywords

Mitutoyo, 137-205, tubular inside micrometer, inside micrometer 1500mm, large bore micrometer, extension rod micrometer, cylinder measurement, machinist tools.