Spi 13-150-8 Round Bar Center Finder Mechanical

Product Description

The SPI 13-150-8 is a mechanical round bar center finder designed to quickly and accurately locate the center of cylindrical stock. The tool uses a cylindrical contact head measuring 0.2 inches in diameter mounted on a 3/8-inch shank, making it compatible with standard drill press chucks and milling machine spindles. A visual edge alert mechanism signals when center is found, eliminating guesswork during layout. With a double-end configuration and a center finder capacity of 3 inches, this tool suits a broad range of round bar diameters. Machinists, tool and die makers, and precision fabricators rely on this style of center finder for repeatable, fast centerline location on the lathe, mill, or drill press.

This center finder is suited for use in machine shops, fabrication facilities, and maintenance environments where round bar stock must be center-located before drilling, boring, or turning operations. The mechanical, non-powered design requires no batteries or electronics, making it straightforward to use and simple to maintain. It is appropriate for both production and job-shop settings handling a variety of cylindrical workpiece sizes up to 3 inches in capacity.

Key Features

• Cylindrical contact head for accurate center location on round bar stock
• 0.2-inch head diameter for precise contact on small to medium workpieces
• 3/8-inch shank diameter fits standard drill press chucks and milling spindles
• Double-end configuration extends versatility across a range of setups
• Visual edge alert mechanism provides a clear, easy-to-read center indication
• Mechanical operation requires no power source

Compatibility

Designed as a direct-use center finding tool for cylindrical workpieces up to 3 inches in diameter, compatible with any machine spindle or chuck accepting a 3/8-inch shank.

Installation Notes

Insert the 3/8-inch shank into the machine chuck or collet and tighten securely before use. Ensure the spindle is at low RPM when using a center finder of this type to avoid damage to the contact mechanism. Always confirm the machine is in a safe, controlled state before making contact with the workpiece. No permanent installation is required; the tool is removed after centerline location is complete.