Horsedoc wrote:
JRscooby wrote:
Warning! Drilling is not hard, but it will heat a bit to the point it can not be sharpened. I ground a dull point on a piece of half inch all-thread about a foot long, put a piece of PCV pipe between nuts on the other end. Lay the flap on 2Xs with a gap where you want the hole. Heat the point, and shove it thru the flap, nice round hole for the 3/8 bolt.
What? Synthetic rubber hard enough to heat and ruin a drill bit? Really?
Yes, the good flaps are about half inch thick. After the cut, the rubber has more friction on the bit than steel. A half inch bit will leave a hole that fits tight on a 3/8 bolt.
You can use or ignore what I say, cost me the same. But I have mounted a lot of mudflaps in about 35 years of working trucks.