Starrett 52248 Mechanical Depth Micrometer 6 Inch 6 Rods

Product Description

The STARRETT 52248 is a mechanical depth micrometer designed for precise depth measurement in machining, tooling, and inspection applications. It covers a full 6-inch measurement range using a set of 6 interchangeable rotating rods with a diameter of 5/32 inch (3.97 mm). Graduation is 0.001 inch, with an accuracy of 0.0001 to 0.0002 inch, making it suitable for close-tolerance work. The ratchet stop thimble ensures consistent measuring pressure on every reading. A ring-type knurled lock nut provides quick, positive locking once a measurement is taken. The satin chrome finish reduces glare under shop lighting.

This depth micrometer is used in precision metalworking environments including machine shops, tool rooms, and manufacturing inspection stations. It is suited for measuring slot depths, counterbore depths, shoulder steps, and similar features on machined parts. The 6-inch base length allows stable contact across wider workpiece surfaces. It is typically handled by machinists, toolmakers, quality control technicians, and metrologists. The included case protects the instrument and rods during storage and transport.

Key Features

• 6-inch measurement range with 6 interchangeable rotating rods
• 0.001 inch graduation for precise depth readings
• Accuracy of 0.0001 to 0.0002 inch
• Ratchet stop thimble for repeatable measuring pressure
• Ring-type knurled lock nut for quick and secure locking
• 6-inch base length for stable contact on wider surfaces
• Satin chrome finish reduces glare in shop environments

Compatibility

Designed as a standard mechanical depth micrometer for general precision measurement use in machine shop and inspection environments.

Installation Notes

Select the appropriate rod for the target depth range and ensure it is fully seated and locked before measuring. Clean the base and workpiece contact surfaces before use to avoid measurement errors from debris. Store rods in the provided case to prevent damage to the measuring faces. Calibrate against a known reference standard before use in critical inspection applications.