Did you miss my question? Maybe you just aren't familiar with my particular iron.
I have the FX-951. There are so many tips I'm lost.
The advice from AC0FP is valid, especially with regard to temperature, 680 to 700 degree F
and solder selection (Kester "44", 63/37 alloy, 0.25" or 0.20" size)
The difference, for your Hakko FX-951,
is that Hakko T15 series soldering tips are used by this specific model series. http://www.hakko.com/english/tip_sel...eries_t15.html
You will need a handful of tips. Do NOT make the mistake in believing ONE tip will do everything.
START by looking at the Shape D tips. These are the flat-blade screwdriver profile tips.
I like to have a 1/16 (0.062) and 3/32 (0.094) inch screwdriver profile tip for my general soldering work.
These 2 tips can handle general PC board work (thru-hole) and lugs on controls (switches, pots, terminal strips). http://www.hakko.com/english/tip_selection/type_d.html I am not an advocate of conical profiles for general soldering work -- I have seen too many conical tips burnt up, as the operator cranks up the temperature to compensate for incorrect tip profile.
We have Chinese copies of the old-school Hakko irons and get the knock-off tips from Circuit Specialists. I pretty much do everything with a 1.6 mm chisel tip. Even the 0.5 mm pitch ICs. Practice, practice, practice.