Hi, I bought a Starrett automatic punch to replace one that I lost. The old one had a replaceable tip, the new one doesn’t. Also the first replacement wasn’t the largest Starrett model. I ended up ordering the bigger one. If I need a lighter mark I just adjust it to suit.
Jamie
You want one with a good spring, they may all technically do the same job some just have a more powerful punch. For example my boss has a no name japanese made automatic punch, I have a punch that looks EXACTLY the same not a bit of difference except mine is chinese. Heres the kicker though my bosses punch has a powerfull punch to it and leaves a very good center for you, my punch on the other hand does not leave anywhere near as good a center and has a noticable lighter punch to it.
Starrett must have recently went to the solid tipped punches. I did have a brand new one from about two years ago until one of the thieving bastards at work got it and a supply of tips I had. And with the Starrett punches, you have to watch which one you purchase. If you do a lot of sheet metal, you don't want the heavy duty one, and which one that is, I can't remember

I do know that the one that has the strong spring in it, will poke a hole through some sheetmetal and you can't back it off enough to lighten the pressure. I'd back mine almost all the way out and it was still too much.
General makes one that is about the size of a pencil and has a clip so you can put it in your pocket. It's not a bad punch size to have, but if you buy one, you may as well buy three. Reason being is that if you get one, it may not work 100% of the time. It won't catch the clicker inside until you depress it three or four times.
Also on the solid tipped punches, if you find that you have to sharpen the point, don't try to do it by freehand. If you do, and it's out of round, it can throw your hole off by a few thousandths. That may not make a difference to some, but to others that do machining, a few thousandths may as well be an inch. So when you sharpen it, take it apart and chuck the tip rod up in a hand drill, then spin it while you sharpen it against your bench grinder or belt sander. That will insure that the tip is concentric and will make an even ***** point.
