Basic Seatbore System

　　Cactus Cutters' adjustable Basic Seatbore System for Peterson Seat and Guide machines includes: four different sized cutter bodies ranging in size from 1.250" to 2.250", a 5/8" Micrometer Setting Instrument with a Sherr-Tumico micrometer head, two carbides for each cutter body, and a System Maintenance Kit. Additional sized cutter bodies, balldrivers, types of carbide and replacement parts are available and sold separately.

　　Cutter Body and Balldriver - The Most Efficient Solution

　　Cactus Cutters' after-market cutter bodies for Peterson machines come standard with a 5/8" drive bore. Our system is fully compatible with Peterson drive mandrels and wear sleeves. No additional parts or tools are necessary. Another option is to replace the mandrels and wear sleeves altogether and use our custom designed, 2-flute balldriver. Our 2-flute balldriver eliminates the need to change-out drive mandrels. This balldriver also eliminates the need to level individual pilots. Cutter body and balldriver, when used together, provide you the most efficient solution to boring valve seat counterbores.

　　Seatbore System is a Multi-Tasker

　　Cactus Cutters' Seatbore System is a multifunctional tool that provides a superior solution to your automotive machining needs. With one system, you can:

　　1) Bore Valve Seat Counterbores

　　2) Unshroud Combustion Chambers

　　3) Machine Spring Seat Pockets

　　4) Relieve Rocker Stud Boss

　　Cactus Cutters' cutter bodies are able to lock to the Peterson wear sleeve allowing you to perform an interrupted cut. Replace our standard carbides with radius carbides and our cutter bodies become Chamber Hogs. As our system is fully adjustable, our chamber hogs can unshroud any sized combustion chamber. Replace carbides with spring pocket cutter blades and you can now machine valve spring pockets. Using the 1.250" cutter body locked to your standard Peterson wear sleeve, you can cut down rocker stud boss to reduce the press-fit on the stud prior to extraction. Flexible, compact, multi-purpose and economical - truly a superior solution to your cylinder head rebuilding needs.

　　Carbides

　　Each cutter body comes equipped with two industry standard carbide inserts. Each carbide has four sharpened cutting corners. Carbides on all but the 1.250" cutter body are interchangeable giving you twenty-four cutting corners in the Basic System. Carbides can be rotated to give you fresh cutting corners. Carbides are replaceable and cutter bodies used with reasonable care, should give you a lifetime of use. Never again need to braze a cutting tool! This increases the return on your investment substantially as compared to your fixed blade cutters.

　　Micrometer Setting Instrument with Sherr-Tumico Micrometer Head

　　Our purpose-built Micrometer Setting Instrument provides actual, direct-read, carbide insert adjustments. Unlike other manufacturers' adjustable cutting systems, our micrometer spindle actually comes into contact with the carbide insert. Setting standards are not necessary. This eliminates the need for dial indicators and mathematical computations, reduces math errors and increases productivity by saving time. With frequent use, the micrometer face could become gouged, so we give you a carbide face on our micrometer. The carbide face will protect your instrument for years to come.

　　The Sherr-Tumico micrometer head is fitted to a heavy-duty, lifetime, micrometer stanchion. Our micrometer carries the Sherr-Tumico guarantee. A micrometer support kit is included.