Starrett 51231 Vernier Height Gage 0-18 Inch

Product Description

The STARRETT 51231 is a vernier height gage designed for precise vertical measurement in layout, inspection, and quality-control applications. It covers a measurement range of 0 to 18 inches with a graduation of 0.001 inch, making it suitable for work that demands fine linear resolution. The base, beam, and sliding jaw are finished in satin chrome to reduce glare and resist corrosion. The jaw and scribing surfaces are hardened and lapped for wear resistance and long-term accuracy. Weighing 5 pounds, the instrument is substantial enough for stable surface-plate use without being cumbersome. Machinists, toolmakers, and metrology technicians are the primary users of this class of instrument.

The STARRETT 51231 is used on surface plates in machine shops, tool rooms, fabrication facilities, and inspection departments. It is suited for scribing part layout lines, checking step heights, and verifying dimensional compliance during incoming or in-process inspection. The gage is appropriate for both job-shop one-off work and repeat production verification tasks. Its satin chrome finish and easy-reading vernier scale reduce eye strain during extended use sessions. The instrument is a bench-top tool and is not intended for in-machine or field measurement in harsh environments.

Key Features

• Measurement range of 0 to 18 inches with 0.001 inch vernier graduation
• Hardened and lapped contact surfaces for wear resistance and accuracy retention
• Satin chrome finish reduces glare for easier vernier scale reading
• Flush-fitting jaw design for consistent contact with workpiece surfaces
• Easy-reading vernier layout minimizes misreading during routine inspection

Compatibility

Designed as an OEM-style precision layout and inspection instrument for use on standard surface plates in machine shop and toolroom environments.

Installation Notes

This instrument requires no installation and is a hand-held metrology tool. Before use, verify that the surface plate and gage base are clean and free of chips or burrs that could affect zero reference. The gage should be zeroed on a clean, flat reference surface before each measurement session. Calibration and verification should be performed by a qualified metrology technician in accordance with applicable shop quality procedures.