Starrett 70912 Ball Contact Point Steel 0.1181 in

Product Description

The STARRETT 70912 is a ball-style contact point designed for use with dial test indicators in precision measurement applications. The contact tip measures 0.1181 inches in diameter with a contact point length of 5/32 inches (approximately 0.156 inches). The tip diameter is 0.1200 inches. Constructed from steel, this contact point delivers the durability and dimensional consistency required for reliable indicator readings in machining, inspection, and setup work. It is installed by machinists, toolroom technicians, and quality control personnel who need accurate surface contact during measurement.

This contact point is suited for shop-floor and inspection-room environments where dial test indicators are used to check runout, alignment, flatness, and part positioning. It threads onto compatible indicator spindles and is intended for applications where a ball-style tip is preferred over a flat or pointed contact, such as on curved or irregular surfaces. Typical use cases include surface plate work, lathe setup, and CMM fixturing support tasks.

Key Features

• Ball-style contact tip for accurate readings on curved and irregular surfaces
• Ball diameter of 0.1181 inches (3.00 mm) for precise point contact
• Contact point length of 5/32 inches (3.97 mm)
• Tip diameter of 0.1200 inches
• Steel construction for wear resistance and dimensional stability
• Direct replacement contact point for Starrett 711 Series Last Word Dial Test Indicators

Compatibility

Designed for use with Starrett 711 Series Last Word Dial Test Indicators as stated by the manufacturer.

Installation Notes

Installation is performed by machinists or metrology technicians. Before swapping contact points, remove the indicator from the spindle or fixture to prevent accidental deflection or damage to the indicator mechanism. Use the appropriate wrench or contact point tool to thread the point in securely without overtightening, which can damage indicator threads. Verify indicator calibration after changing contact points.