Spi CDI26103B-SPI Dial Drop Indicator 0-25-0

Product Description

The SPI CDI#26103B-SPI is a dial drop indicator designed for precise dimensional measurement in machining, inspection, and quality control applications. It features a 0-25-0 balanced dial reading and a fine graduation of 0.0005 inches, making it suitable for detecting small surface variations and runout during part inspection. The flat back design allows the indicator to seat flush against magnetic bases, surface plates, and indicator holders. A built-in revolution counter helps the technician track total travel across multiple dial rotations, reducing read errors during longer measurements.

This dial drop indicator is used in machine shops, tool rooms, and production inspection environments. It is suited for tasks such as checking shaft runout, verifying part flatness, setting up workholding on mills and lathes, and confirming tolerance compliance on finished components. Machinists, toolmakers, and quality control inspectors are the primary users. The compact 1.5-inch dial diameter keeps the overall footprint manageable in tight setups.

Key Features

• 0-25-0 balanced dial reading for bidirectional measurement
• 0.0005 inch graduation for fine-resolution inspection work
• 1.5 inch dial diameter with black dial face for high contrast readability
• Flat back design for flush mounting on magnetic bases and indicator stands
• Revolution counter tracks cumulative travel across multiple rotations

Compatibility

Designed as a standard-shank dial drop indicator compatible with conventional indicator holders, magnetic base arms, and dial indicator fixtures that accept this style of drop indicator.

Installation Notes

Dial drop indicators are typically mounted and adjusted by machinists or inspection technicians using a magnetic base, indicator stand, or dedicated fixture. Before mounting, ensure the work surface and indicator contact point are clean and free of chips or debris. Do not overtighten the clamping collar on the indicator stem, as this can affect spindle movement and measurement accuracy. Follow shop calibration procedures and handle the indicator carefully to avoid dropping, which can damage the internal gear mechanism.