Starrett 72451 Ball Contact Point Steel Dial Test Indicator

Product Description

The STARRETT 72451 is a ball-style contact point designed for use with dial test indicators in precision measurement applications. The contact tip is a 0.031-inch diameter steel ball mounted on a contact point measuring 0.625 inches in total length. This replacement contact point threads into compatible Starrett dial test indicators and provides a consistent, low-friction contact surface for measuring small bores, grooves, and features that require a spherical tip. Machinists, toolmakers, and metrology technicians install this part when the original contact point is worn or when the application requires a ball-style tip instead of a flat or pointed contact.

This contact point is suited for shop-floor and inspection-room environments where Starrett 811 and 811M dial test indicators are in use. Typical applications include bore runout checks, surface alignment, slot measurement, and any inspection task where a small-diameter ball tip improves access or accuracy. The steel construction holds up under repeated contact cycles in standard machining and quality-control environments.

Key Features

• Ball-style tip with 0.031-inch diameter for access to small features and tight geometries
• Contact point length of 0.625 inches for standard reach on compatible indicators
• Steel construction for durability through repeated measurement cycles
• Direct OEM-style replacement identified as Point Identification PT23062
• Compatible with Starrett 811 and 811M dial test indicators

Compatibility

Designed for use with Starrett 811 and 811M Dial Test Indicators as stated by the manufacturer.

Installation Notes

Contact point replacement is performed by machinists and metrology technicians familiar with dial test indicator service. Remove the indicator from service before replacing the contact point and handle the ball tip carefully to avoid damage to the precision contact surface. Thread the contact point in by hand to the specified engagement depth using the appropriate small wrench or driver for the indicator body — do not overtighten. Verify indicator function and zeroing after installation before returning the tool to service.