Regis Manufacturing Sioux Valve Seat Grinding Pilot

Regis Manufacturing Sioux valve seat grinding pilots are precision tooling for centering a valve seat grinding stone in the valve guide during seat reconditioning. They are for Sioux-style valve seat grinding equipment, and they help the grinding wheel stay aligned with the guide bore. That alignment supports concentric, accurate valve seats in engine rebuilding and machine shop work.

Key Features:

• High-quality alloy steel construction for durability and long service life
• Solid taper pilot design with a special straight and taper shank
• Self-centering action for accurate alignment in the guide
• Made for the Sioux 3/8" + .010 (.385") pilot shank style
• Offered in a range of pilot diameters to match different valve guide bores

Regis Manufacturing has supplied machine shop tooling since 1959. These pilots suit engine builders and machine shops that want consistent, repeatable valve seat grinding results. Choose the pilot diameter that matches your valve guide bore.