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Comments
Drill bits should be high strength but brittle steel. That’s either a cheap low quality steel or it’s been heated so much it’s annealed itself (which is unlikely)
Ebay mark7777_1
I've also seen them unwind the helix.
Work never bought from that supplier again.
Ian
Lowering my expectations has succeeded beyond my wildest dreams.
I was drilling out the mounting hole in a Lace Sensor. Those baseplates are thick! Didn't use a vice because I didn't want to damage the plastic, and didn't use the drill press because...well, I couldn't be arsed getting it out of the shed.
Lesson learned.
I wonder, did you buy the bits as being for drilling brass?
Looks like the order was fulfilled as drill bits made of brass...