Quote:
Originally Posted by wdfifteen
They were supposed to limit torque when assembling aluminum aircraft. But i’ve set thousands of Phillips screws of all kinds and sizes with many makes of Phillips bits in a portable drill. Most of the screws at Loews and HD have Phillips heads. I’ve never had problems like I have with these.
I don’t mind them popping out at a torque that will actually drive the screw in. I have had many, many Phillips head drivers that would drive a 2” #8 deck screw into pressure treated #2 pine far enough to bury the head. I’ve given up on using these Milwaukee bits for anything that big. They just strip out the heads.
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I think your problem is you are using the in a drill. They are designed for an impact driver. A typical bit is equal to or softer than the screw so when it cams out it gives not the screw head. These are hardened so harder than the screw. Used with an impact driver it will jam down into the screw reducing cam out. Using with a drill when it tries to torque in a drill it will cam out and tear the screw.