Starrett 56141 Mechanical Inside Micrometer Set 200mm

Product Description

The STARRETT 56141 is a mechanical inside micrometer set designed to measure internal diameters and bores with precision. It covers a measurement range of 50 mm to 200 mm using six solid extension rods, each marked with its length for quick identification. The friction thimble provides consistent measuring pressure, and graduation is 0.01 mm with an accuracy of 0.003 mm per 25 mm. Hardened and ground anvils resist wear under regular shop use. Insulated rods reduce heat transfer from the technician's hands, helping maintain measurement accuracy. This set is suited for machinists, toolmakers, and precision measurement professionals working in industrial or shop environments.

The 56141 is used when inside diameter measurements are needed across a wide range without switching instrument sets. The six extension rods allow the technician to build up reach incrementally across the 50 mm to 200 mm range. Typical applications include measuring cylinder bores, bearing housings, bushings, and other internal features. The quick-reading figures on the rods speed up rod selection during setup. The set ships with a protective case and all measuring rods included.

Key Features

• Measurement range of 50 mm to 200 mm via six solid extension rods
• 0.01 mm graduation for fine resolution readings
• Accuracy of 0.003 mm per 25 mm
• Friction thimble for repeatable, consistent measuring pressure
• Hardened and ground anvils for long service life
• Insulated rods marked with length for fast identification and reduced heat transfer
• Includes protective carrying case

Compatibility

Designed as a general-purpose inside micrometer set for precision measurement applications requiring internal diameter readings from 50 mm to 200 mm.

Installation Notes

Inside micrometer sets are used by machinists and precision measurement technicians, not typically by trade contractors. Before use, verify the measuring faces are clean and free of debris. Extension rods should be fully seated and locked before taking a measurement. Store rods in the provided case to prevent damage to the hardened anvil surfaces.