Spi 98-356-9 Indicator Positioner Holder 175 Lb Magnetic

Product Description

The SPI 98-356-9 is a magnetic-base indicator positioner holder designed for securing dial indicators and test indicators during precision measurement work. It features a post-and-arm configuration with fine adjustment capability, allowing technicians to position a dial indicator with accuracy in inspection, machining, and quality-control applications. The magnetic base delivers 175 lb of pull force to hold securely to ferrous surfaces such as machine tables, lathe beds, and surface plates. The holder is constructed from aluminum and weighs 0.8 pounds, making it easy to reposition without fatigue during extended use.

This indicator holder is suited for metrology and machine-shop environments where stable, repeatable gauge placement is required. The post-and-arm style allows vertical and horizontal positioning across a range of setups. Fine adjustment on the arm lets users dial in exact indicator contact without repositioning the base. Typical users include machinists, QC inspectors, and toolroom technicians working with surface plates, milling machines, lathes, and granite inspection tables.

Key Features

• 175 lb magnetic pull force for secure hold on ferrous surfaces
• Fine adjustment on the post arm for precise indicator positioning
• Post-and-arm style with 7-inch overall length
• 3/8-inch clamping diameter accommodates standard indicator shanks
• M8 x 1.25 thread size for compatibility with standard accessories
• Lightweight aluminum construction at 0.8 pounds

Compatibility

Designed as an OEM-style replacement and standard-use magnetic indicator holder for dial indicators and test indicators with a 3/8-inch shank diameter, commonly used in machine-shop and inspection environments.

Installation Notes

Place the magnetic base on a clean, flat ferrous surface and engage the on/off switch before positioning the arm. Ensure the surface is free of chips, coolant, and debris that could reduce magnetic pull force. The arm and holder should be tightened at each joint before taking a measurement to eliminate unwanted movement. Disengage the magnet before repositioning to avoid dragging debris across precision surfaces.