I pushed the drill a little too hard from the other side. Didn’t realise the damage I’d done until I came around the other side to my wife shouting and screaming. ¯\(ツ)/¯
This will happen every time you use a hammer drill because that’s just how they work - by hammering.
Protip: use way smaller bit first to go all the way through as a pilot hole, then use the size you need and drill from either side to stop it from blowing out like this.
I’ve often found you don’t even need the hammer aspect, just using a mason bit will work, especially for softer materials. It’ll take longer, but if it’s only for the finish, it’s faster than fixing a blowout like this.
Alternatively turn off the hammer for the finish, or finish the hole from this side (since you have the pilot hole). This works well on any material, for example to prevent blowouts on wood or flash on metal.
