Starrett 64438 Indicator Positioner Holder Fine Adjustment

Product Description

The STARRETT 64438 is an articulated arm indicator positioner holder designed for precise dial indicator and test indicator positioning in machine shop, toolroom, and inspection environments. The unit features a fine adjustment mechanism that allows controlled, incremental repositioning of the indicator without disturbing the overall setup. The magnetic base mount style enables quick attachment and release on ferrous machine surfaces. A universal indicator holder is included. The arm measures 8 inches in length, making it suitable for reaching workpieces in confined fixture setups. Machinists, toolmakers, and quality control technicians install and use this tool as a standard part of workholding and inspection workflows.

This holder is used in applications where repeatable indicator placement is required, such as runout checks, surface parallelism measurement, bore alignment, and machine axis verification. The articulated arm design allows the indicator to be positioned at multiple angles and orientations without requiring separate adapters. The fine adjustment feature is particularly useful when zeroing an indicator on a reference surface or when incrementally repositioning between measurement points on a part. It is suited for use on milling machines, surface plates, lathes, and machining centers.

Key Features

• Articulated arm design allows multi-angle indicator positioning without additional adapters
• Fine adjustment mechanism provides controlled, incremental movement for precise indicator placement
• Magnetic base mount style for fast attachment and removal on ferrous machine surfaces
• Universal indicator holder included, compatible with standard dial and test indicators
• 8-inch arm length provides reach into confined workholding and fixture setups

Compatibility

Designed as an OEM-style replacement and standard indicator positioner holder for use with dial indicators and test indicators in typical machine shop and inspection applications. No specific model compatibility data was provided in the product input.

Installation Notes

This holder is typically set up by machinists and toolroom technicians without specialized tooling. Before mounting, ensure the ferrous surface is clean and free of chips or oil film that would reduce magnetic holding force. Position the arm and lock all articulating joints before taking measurements to prevent indicator drift. Verify indicator contact force and preload per the indicator manufacturer's specification before recording measurements.