How do I drive out a VERY tight pin?

Question

I'm trying to drive out a pin (in the worm gear assembly of my KitchenAid mixer) with a pin punch but the pin won't budge! It is so tight that all my poundings are flattening my punch, but the pin won't even budge!

Thank you all for your replies!

Answer 1

Using the basic principle that metal contracts if its cold and expands if its hot...maybe you could try putting it in the freezer for awhile, and then see if you can remove it. Or perhaps even heating the pin first somehow (by placing it in some boiling water?), so that it expands the hole a lil bit and then transfer it from the hot water, directly into a bucket of reeeally cold ice water* (hint: sprinkle salt on top of the ice to make it even colder), to where the metal pin will contract just enough to break itself lose so you can get it out. -good luck! hope this helped!

Answer 2

Is this a roll pin or taper pin?

Perhaps if it is a taper pin you are hitting on the wrong end.

Make sure your punch is about the same size but just a tad bit smaller with a square blunt face. If you use something like a center punch it will indent the center but push out the walls of the pin to make it even tighter.

While freezing the pin would make it smaller perhaps you can heat the outside worm gear to make it bigger to help get the pin out.

If it is a roll pin, an easy out would work.

Since I cannot actually see the pin you are working on, I can only give you some general ideas.

Answer 3

try heating up the surrounding surface with a small butane torch this will expand the metal enough to remove the pin when you are re-installing the pin purchase dry ice and wrap the ice and the pin together in newspaper for about an hour or so this will shrink the pin enough to re- install it.

Answer 4

Usually if it is that tight you will have to drill it out. The only problem is if you still need the pin.

Answer 5

Simply drill it out and put in a new pin.

Answer 6

it sounds that what you need is a strong base and a better punch, it it bends then its not strong enough and you need a small sledge hammer and a vise.