Removing a Stuck Plastic or Aluminium Cup Bottom Bracket Using Hardware Shop Tools

Bottom brackets with plastic or aluminium cups are very easy to round the splines. Or maybe you don't want to buy a hard to find tool you'll only use once, as in my case. Here's how to remove them quickly. Use a 32mm holesaw with a 1/4" pilot drill to remove the front of the bottom bracket cups – the pilot drill prevent the holesaw from wandering as it fits into the crank bolt hole. Once you've hit the steel of the bearing/unit, waller the drill around a bit to make sure you've got the cup materiel completey removed. Do both sides, then smack the axle with the biggest hammer you've got. Ideally you'll support the frame either with an assistant holding it, or laying it on a piece of wood with a hole. Some pop out easily, others take a pounding. When it's out, section the cups, voila!