Spi MS160412018 Indicator Positioner Holder Magnetic Base

Product Description

The SPI MS160412018 is a fine-adjustment indicator positioner holder designed to secure dial indicators and similar precision measuring instruments during inspection and gauging operations. It features an articulated arm that allows multi-axis positioning, paired with a rectangular magnetic base that mounts directly to ferrous machine surfaces. The base measures 55 mm in height and 117 mm in length, and the overall arm length reaches 685 mm, providing substantial reach for workpiece access. At 5 pounds, the assembly is substantial enough to resist vibration-induced drift. Machinists, quality control technicians, and tool-and-die professionals install this type of holder on surface plates, mill tables, and lathe beds.

This positioner holder is suited for machine shop environments where repeatable, stable indicator placement is required. Typical applications include runout checks, surface flatness verification, bore alignment, and setup confirmation on CNC or manual machining equipment. The magnetic base activates and deactivates to allow quick repositioning without leaving marks on the work surface. The articulated arm provides the flexibility to route around fixtures and reach recessed measurement points that rigid-arm holders cannot access.

Key Features

• Fine-adjustment mechanism for precise final positioning of the indicator tip
• Articulated arm with 685 mm overall length for extended reach
• On/off magnetic base mounts securely to ferrous surfaces without fasteners
• Rectangular base geometry at 117 mm length and 55 mm height provides stable footprint
• Includes magnetic base with arm as a complete, ready-to-use assembly

Compatibility

Designed as a general-purpose OEM-style indicator positioner holder compatible with standard dial indicators and test indicators commonly used in precision metrology and machine shop inspection setups.

Installation Notes

Installation is performed by machinists or metrology technicians and requires no tools for mounting — the magnetic base engages directly to any clean, flat ferrous surface. Ensure the mounting surface is free of chips, coolant film, and debris before activating the magnet to maximize holding force. Do not use this holder on non-ferrous surfaces or near strong external magnetic fields that could interfere with base retention. Confirm all arm joints and locking collars are tightened before taking measurements to prevent indicator drift.