Re: [atlas_craftsman] Need advice on mini mill
- At 09:42 PM 11/30/2004 -0600, you wrote:
> >I'd likely put this in the basement and I'm not up to moving a Bridgeport
>The smallest Bridgeport weighs roughly 1800 Lbs. It is pretty stiff
>against the cutting forces...<snip>
But I'm sure that rigidity is just wonderful. MSC price: $12,000. :-)
>Then, there are the round-column machines, which lose the X-Y alignmentI'm beginning to understand this. If you want to index with a dividing head
>you have to change the height of the head. So, I would strongly urge
>you to just
>avoid those machines, an only look at the ones with rectangular or
>Also, look carefully at the Y table travel, and the min and max height
>of the spindle
>above the table. When switching between a small end mill in a collet and a
>large jobber's length drill in a big drill chuck, yo can need to move
>the head 5"
>or more to accomodate the difference. Also, sometimes you need to put a
>large flat piece right over the table, other times you want to hold a
>small part in a
>milling vise. That adds several inches to the height, and you want to
or rotary table with a vice,
then use a drill in a chuck, there's no height room . I was thinking about
a Rong Fu RF-30, but the round
column it has is something to understand in operation.
So there is a Rong Fu RF-45 with dovetail column and tilting head (90 left,
30 right) that MSC lists for $2300.
Looks nice. 18" spindle to table. But I found a Grizzly that looks like an
RF-45 clone (same features):
Max. dist. spindle to table: 18 5/8", Table size: 9-1/2" x 32-1/4" , Table
travel 21-5/8" x 7-1/2"
600 lbs, $1395, 3 phase motor, so I'd get a VFD and have variable speeds.
Although this is much more money, it looks much more capable. And I want to
build a power hammer machine
involving trimming two 5/8" x 20" x 20" plates together in a 6" deep C
shaped notch for example. Make a 3" round x 8" long
aluminum die holder collet. Several other parts, other projects but
sometimes 1" steel parts, sometime 12 x 24 size.
Well, thanks everyone. This is very helpful.
[Non-text portions of this message have been removed]
- Hi folks.
Not gonna repeat any of the good info already submitted by
As the Sieg X3 (bigger than the minimills) came
up during some private conversation recently, I thought
you might want to learn about Dan Kautz's excellent
private website that has a detailed article on this machine,
as well as as some very logical analysis/critiques on choosing
machinery suitable to the home machinist. He seems to be
able to cut through fiction and make informed judgements.
Dan Kautz's web site http://www.tedatum.com/thms/
has a very positive article about the Sig X3 including lots of tips
and detailed disassembly pix (see "Workshop" on his left menu).
His site was so good that it was added to the very short list
of links on my site Machining and Metalworking at Home
http://my.tbaytel.net/jstudio/ during my 01 December update.
Then I open the latest copy (#102 -- Nov 2004) of Model
Engineers' Workshop and there is Part 1 by a Brit machinist
on how he is converting an X3 to CNC. Looking at his few
pix, and comparing to Dan's pix, it seems to be virtually the
same machine; so CNC conversion methods (and machine initial
tuneup tips after purchase ) should be compatible.
FYI, this mag MEW underwent a big price increase this year
but I just subscribed in November to a special price about half
of the current newstand price. If you are interested, following
is some info from the North American distributor.
Usual caveat: just a subscriber. Don't know when the offer ends.
Steve -- in Thunder Bay, Ontario, Canada
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