Spi AA Edge Finder 0.2 in Head 3/8 in Shank Mechanical

Product Description

The SPI AA is a mechanical edge finder designed for use on milling machines, drill presses, and machining centers to precisely locate the edge of a workpiece. With a 0.2-inch cylindrical contact head and a 3/8-inch shank diameter, it fits standard toolholders and collet chucks common in manual and CNC milling setups. The single-end design uses a mechanical actuation method and provides an audible alert when the contact tip deflects at the workpiece edge, giving the operator a clear, repeatable signal at the point of edge contact. Weighing 0.25 pounds, it is compact and easy to handle during setup operations.

This edge finder is suited for job shops, toolrooms, and production machining environments where accurate workpiece datum location is required before cutting operations begin. It is used by machinists and CNC operators to establish X and Y zero points on a workpiece. The mechanical, non-powered design means no batteries or external power source is required, making it straightforward to deploy in any shop environment with standard milling or drilling equipment.

Key Features

• 0.2-inch cylindrical contact head for precise edge detection at the workpiece surface
• 3/8-inch shank diameter fits standard collets and toolholders
• Mechanical power type requires no batteries or electrical connection
• Audible edge alert mechanism provides a clear, repeatable signal at point of contact deflection
• Single-end configuration for straightforward one-direction edge location
• Lightweight at 0.25 pounds for easy handling during machine setup

Compatibility

Designed for use in standard 3/8-inch collets and toolholders on manual mills, knee mills, and CNC milling machines requiring mechanical edge-finding capability.

Installation Notes

Installation is performed by a machinist or CNC operator. Insert the 3/8-inch shank into a compatible collet or toolholder and tighten to the machine manufacturer's specified holding torque before use. Power down the spindle drive and confirm the spindle is at a safe low RPM setting appropriate for edge-finding operations before contacting the workpiece. Do not run the edge finder at high spindle speeds, as excessive RPM can damage the contact tip and produce inaccurate readings.