I was trying to drill out a busted driveshaft spline in a New Holland 617 disc mower gearbox. I chewed up 3 "standard carbide masonary bits" because they are so hard that the vibration and heat destroy the inserts. I then went to Ace Hardware of all places and they sold me a softer carbide bit which was made specially for drilling hardened steel. It worked great until I snapped it off. I then learned I could press out the busted piece which of course meant all the drilling was a waste of time. Check and see if you can buy the special carbide bit for drilling steel. If all else fails, take a punch and break the dang thing up into little pieces and then drill and tap the resulting mangled hole to the next bigger size and be done with it. John
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Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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