Starrett 70823 Radius Contact Point 4-48 5.16mm Dia

Product Description

The STARRETT 70823 is a drop indicator radius contact point designed for precision measurement applications. Machined from solid carbide, this contact point threads onto compatible dial indicators via a 4-48 thread. The spherical radius tip provides repeatable contact geometry for accurate surface readings. The contact point measures 5.16 mm in diameter with a contact point length of 12.7 mm and an overall length of 13 mm (0.5 inches). Solid carbide construction delivers wear resistance suited to high-cycle measurement work in shop, field, and quality-control environments. Installed by metrology technicians, machinists, and quality inspectors.

This contact point is suited for use in dimensional inspection setups where a radius-style tip is required. It is compatible with back plunger dial indicators and AGD-pattern dial indicators in shop and laboratory settings. Common applications include surface flatness checks, runout measurement, and bore alignment tasks. The 4-48 thread is a standard thread for dial indicator accessories, making this point a direct-fit replacement in measurement setups that call for a radius contact.

Key Features

• Solid carbide construction for long service life under repeated contact cycles
• Radius contact point style for consistent, repeatable surface engagement
• 4-48 thread fits standard dial indicator stems
• Contact point length of 12.7 mm provides clearance in recessed measurement locations
• Overall length of 13 mm (0.5 inches) keeps indicator height compact
• 5.16 mm diameter tip suits a wide range of measurement surface types

Compatibility

Compatible with 650 and 651 Back Plunger Dial Indicators and AGD Dial Indicators.

Installation Notes

Installation is performed by hand or with a small wrench on the indicator stem. Thread the 70823 into the 4-48 threaded stem of the dial indicator and snug firmly without overtightening, as excessive torque can damage the fine thread. Ensure the indicator is removed from active measurement fixtures before changing contact points. Verify the contact point seats fully and does not wobble before returning the indicator to service.