Starrett 50191 Outside Caliper 24 Inch Firm Joint Steel

Product Description

The STARRETT 50191 is a firm-joint outside caliper designed for accurate outside measurement in machine shops, fabrication environments, and precision layout work. Built with flat steel legs finished to a polished surface, this caliper features a 24-inch leg length and a maximum measuring capacity of 32 inches (800mm). Adjustment is made by screw with a quick-spring nut for repeatable, secure leg positioning. At 3.5 pounds, the caliper provides the mass and rigidity required for consistent readings on large workpieces. It is installed and used by machinists, toolmakers, and precision measurement technicians.

This outside caliper is suited for measuring external dimensions on castings, round stock, structural members, and fabricated components where large-scale outside measurement is required. The 24-inch flat leg design allows it to span large diameters and widths typical in industrial and heavy fabrication settings. It is specified for use with the Starrett 26 series, making it a compatible accessory or replacement leg set within that product family.

Key Features

• Firm joint construction maintains set leg position during transfer measurements
• 24-inch flat steel legs with polished finish for smooth contact on workpiece surfaces
• Maximum measuring capacity of 32 inches (800mm)
• Quick-spring nut with screw adjustment for fast, precise leg setting
• Specified for use with Starrett 26 series
• Includes adjustable leg

Compatibility

Designed for use with the Starrett 26 series. Consult the Starrett product documentation to confirm fitment with specific Starrett 26 configurations before ordering.

Installation Notes

Outside calipers of this size are handled by machinists and precision measurement professionals in shop environments. Before use, inspect the joint tension and screw adjustment for smooth, drag-free operation. Clean contact surfaces on both the caliper legs and the workpiece to ensure accurate transfer measurements. Do not use this caliper as a prying or clamping tool, as overloading the joint will affect calibration and measurement repeatability.