Sorry, Mike, it's been a crazy week/end for me. I totally brain farted sending you money! I will do so tomorrow. The heatsink arrived, and it looks great.
I've seen the ebay stuff; I'd rather deal with sane shipping options and good folks.. I'm going to be cooling about 30-45 watts of well distributed heat, and I will be using a fan on it so it shouldn't be a big deal as far as the fin arrangement and spacing. I'd prefer something like .5" spacing...
is there a set of the smaller jaws that is 3 step (like hard top jaws)? also the "key" that runs legthwise should be 5/16" wide and the cross step ~.4996
+1 for planing beds. I just wish I'd bought a 4 or 4.5 bed and had it planed but I'll be living with my 3.5 instead. I sent mine out, cost about $500 shipping in.
Brake & parts cleaner? I'd try the permatex brand to start, it has a lot of acetone in it. Brakleen in the black can also ought to work. Acetone if your brake cleaner doesn't do the job?
+1 on bushing in your boring bar holder. It's a PITA to get on center and straight but it's worth it. I've drilled a bunch of 1" dia 7 3/4" long holes in 6061, I think your 1h time for that hole in 4140 is not bad at all!
300-400 rpm on a hole like that, hope you've got enough motor on your...
What I suggest for primer is a product called ZRC - it's a primer with atomized zinc in it, it's very nearly as good as a hot dip galvanizing. Only drawback in our scenario is that it does smear a bit when you brush paint over it, but with some care and a thin sealing coat over it to start with...
You might check out penturners.org, there are a number of fellows on there that make pens w/o using kits. I think one of the first guys to do it was Boone Titanium Rings Pens
That will be awesome, I look forward to your update.. Just wanted to add, there is a 23.5"x11.75x3" flat rate box now - so you could order a flat of those (free) and only have to cut 2' pieces.
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