Spi 25-372-4 Dial Indicator Base Kit Magnetic Base

Product Description

The SPI 25-372-4 is a dial indicator base kit designed for precise linear measurement in trade and industrial applications. The kit includes a dial indicator with fine adjustment and a magnetic base, giving technicians a complete setup for surface measurement, runout checks, and alignment tasks. The indicator reads from 0 to 0.001 inches with a resolution of 0.001 inches and a 0-100 dial scale. The magnetic base provides a secure, hands-free hold on ferrous surfaces, allowing for accurate, repeatable readings without additional fixturing. The assembly weighs 2 pounds and is suited for machine shops, fabrication environments, and field service work.

This kit is used in applications that require tight tolerance verification, including shaft alignment, surface flatness inspection, and machined-part qualification. The 3-inch magnetic base length and 6-inch arm length give the technician sufficient reach to position the indicator across a variety of workpiece configurations. The 7-inch post height and 1/2-inch post diameter provide stable vertical extension. The 3/8-inch clamping diameter accommodates standard indicator stems. Machinists, millwrights, pipefitters, and precision maintenance technicians are the primary users of this type of kit.

Key Features

• Dial indicator with fine adjustment included — ready to use out of the box
• Magnetic base with 3-inch base length for secure mounting on ferrous surfaces
• Measurement range of 0 to 0.001 inches with 0.001-inch resolution
• 6-inch arm length and 7-inch post height for flexible indicator positioning
• 3/8-inch clamping diameter fits standard indicator stems
• 2-pound package weight for a portable, field-serviceable kit

Compatibility

Designed as a general-purpose dial indicator base kit compatible with standard 3/8-inch clamping diameter indicator stems and 0.400-inch rod diameter configurations typical of trade and industrial measurement applications.

Installation Notes

Mount the magnetic base on a clean, flat ferrous surface before activating the magnetic lock to ensure maximum holding force. Secure all arm and post joints firmly before zeroing the indicator to prevent drift during measurement. Machinists and maintenance technicians should verify that the workpiece and mounting surface are free of chips, oil film, or burrs that could affect base stability. Follow applicable shop safety procedures and power down any rotating equipment before taking contact measurements.