DIY Doctor UK DIY Forums

Does anybody have any good advice on separating core drills from the arbour after use. They pretty much always seem to seize on for me, especially a large 117mm but I am sure that I don't need a new arbour for each core drill bit. There is never much to get hold of with the arbour even with a good tommy bar through the bit. Is it just brute force or am I missing something?

WD40 and brute force

either put the core in a vice or as I do use an oil filter strap wrench. it lets you get more torque on the core.