I'm talking about the cam bearing feeds. I used carbine because they were available. I snapped the first one. Then I slowed down on the second and just dulled it and every other bit I tried just was useless.
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You don't need to do that. You drill a 1/8 inch hole in the cam bearing and line it up with the oil pasage. There is no need for drilling out set screws.
But if you must the secret is to purge drill them at slow speed.
