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    I developed (originated) this tool in 1961 because it was impossible to find anyone with a mill to bore the case and heads so I could install the larger Corvair pistons and cylinders on my 40 HP engine. It had to be a rugged precision tool that would provide years of shop use with a quality drill press, as we did not have access to a milling machine. Features rugged cast aluminum housing with all 4 feet, 1-1/2" case hardened (heat treated), centerless ground shaft that is running in silicon bronze bushings which provide years of trouble free accurate cutting. I installed a National oil seal in the base's bottom that keeps cuttings or contamination from damaging these bushings and/or the shaft. It has a positive shaft collar stop for exact duplication from hole to hole depth when flycutting. For those who do not have a friction controller on their drill press spindle, a second collar stop can be used for this feature.
    Uses adjustable cutters in the blade holder. Once set the cutter head screws onto the driving shaft. The cutter heads are designed with proper mass (much thicker than our competitors) to provide smooth cuts for boring or just a simple cleanup flycut on a used head. Flycuts and/or bores heads (up to standard 92mm) for more CR or larger bores and bores cases for larger (up to standard 92mm) cylinders without removing studs. Semi-Hemi cutting for properly lowering the CR can be done by purchasing our Semi-Hemi cutter.
    Comes with universal centering device GB 702F, and 2 GB 701 cutter heads for you to set at the needed size. See GB 702's for precision centers for specific size bores. I, personally, recommend purchasing the 15/1600cc precision head center GB 702-855. Additional cutter heads can be purchased and set to needed sizes eliminating the need to reset over and over again. This tool requires a perfectly flat parallel surface for the feet to bolt down to in order to provide parallel seating surfaces for the cylinders. For heads from 1967-on with the 6 locating knobs the GB 705 boring plate is required or the heads must be milled flat. This tool is a precision quality product, not a cheap toy like most people sell! Get a genuine GENE BERG FLYCUTTER. Made in USA by Gene Berg Enterprises.
    Cutting heads for 94mm P/C. It is not possible to have this tool do both heads and case work for 94mm P/C's. When the feet are clearanced to fit the 94mm heads they will be too large to set on the case seating surface regardless of bore size. To get around this problem purchase GB 700B-94 base.


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