Starrett 52228 Mechanical Depth Micrometer 9 in 9 Rods

Product Description

The STARRETT 52228 is a mechanical depth micrometer designed for precise depth measurement in machining, tooling, and inspection applications. It features a 9-inch maximum measurement range achieved through a set of 9 interchangeable rotating rods, each with a diameter of 5/32 inches (3.97 mm). The thimble uses a ratchet stop mechanism for consistent measuring pressure, and the ring-type knurled lock nut allows quick, secure locking of the measurement. Graduation is 0.0010 inches, with an accuracy of 0.0001 to 0.0002 inches. The satin chrome finish reduces glare and resists corrosion during regular shop use. This tool is used by machinists, tool-and-die makers, and quality control technicians.

The STARRETT 52228 is suited for depth measurement of bores, slots, counterbores, and stepped surfaces in both production and inspection environments. The 4-inch base length provides a stable reference surface across wider workpieces. The rotating rod design allows the user to switch measuring extensions quickly without removing the base from the workpiece. This micrometer is a practical choice for job shops, tool rooms, and manufacturing floors where accurate depth measurement is a routine requirement.

Key Features

• 9-inch total measurement range via 9 interchangeable rotating rods
• Ratchet stop thimble for repeatable, consistent measuring pressure
• Ring-type knurled lock nut for fast and secure measurement locking
• 4-inch base length for stable contact on wider surfaces
• 0.0010-inch graduation with 0.0001 to 0.0002-inch accuracy
• Satin chrome finish reduces glare and improves corrosion resistance
• Includes protective storage case

Compatibility

Designed as a standard mechanical depth micrometer for use in general machining and inspection applications where interchangeable-rod depth measurement is required.

Installation Notes

Depth micrometers are installed and used by machinists and quality control technicians. Before use, verify the anvil face and base are clean and free of debris to ensure accurate readings. Lock the spindle with the ring lock nut before recording or transferring measurements. Store rods in the provided case to prevent damage to measuring surfaces.