Spi 13-386-8 Center Head 12 to 24 Inch Blade

Product Description

The SPI 13-386-8 is a center head designed for use with combination square blade sets, accepting blades from 12 to 24 inches in length. The head is constructed from hardened cast iron that has been fully hardened and tempered for long-term dimensional stability and resistance to wear. Center heads are precision layout tools used to locate the center of round or square stock quickly and accurately. Licensed machinists, pipefitters, tool and die technicians, and precision fabricators rely on this type of tool for accurate centerline scribing on shafts and cylindrical workpieces. The unit weighs 0.38 pounds.

This center head is suited for machine shop, fabrication, and maintenance environments where precise center-finding on round stock is a routine task. It pairs with standard combination square blades in the 12 to 24 inch range, making it a versatile addition to existing layout tool sets. Typical applications include shaft work, lathe setup, and general precision layout on cylindrical or square bar stock in both production and job-shop settings.

Key Features

• Accepts blades from 12 to 24 inches in length for flexible use
• Hardened cast iron construction for durability and wear resistance
• Fully hardened and tempered for long-term accuracy and stability
• Locates center points on round or square stock quickly and accurately
• Lightweight at 0.38 pounds for easy handling during layout work

Compatibility

Designed as an OEM-style replacement or standard accessory head compatible with combination square blade sets ranging from 12 to 24 inches in length.

Installation Notes

Center heads are installed by machinists and precision layout technicians as part of a combination square set. Ensure the blade is clean and free of burrs before seating it in the head to maintain accurate alignment. No power source is required for use. Handle with care to protect precision ground surfaces from impact or corrosion.