The iron I use is a Hakko 936 and I love it. I use 60/40 rosin core solder as well. If you look up that iron, you will see the tip I'm using. I think it's the 3/16" tip and it's adjustable in temp. I usually run about half way unless I need to put a lot of heat in something quickly, then I will turn it up about 3/4 way. Hope this helps.