That much is quite apparent now we are talking weights.
This group was founded to cater for the Sieg X2 distributed originally by Grizzly and HF many years ago, generally referred to as the "Mini-mill" This is a similar situation to that for the 7x Mini-lathes also originating from Sieg that spawned the original Mini-lathe.com site and other groups
Over the years numbers of differing distributors and makers have added larger and smaller models that have been embraced by users as still being "mini" insofar as they are in the home shop category and much smaller than most industrial lathes and mills such as the famed Bridgeports.
Many of these machines have sufficient following in their own right to generate dedicated sites and forums.
Nevertheless these small machines still generate discussion that is relevant to small machines and machinists generally and I cannot see anyone having great objection to this although it would help if anyone not referring to an X2 type could mention the fact at the outset.
As has been pointed out by another member people regularly walk around in attics which although not designed as living space are quite happy with 200lb + people walking about so will accept similar loading should anyone wish to experiment with supporting a mill head provided appropriate fixings are used although spreaders and thickeners would be recommended for larger weights
Gerry
Leeds UK
To: GrizHFMinimill@yahoogroups.com
From: ofick@bendbroadband.com
Date: Fri, 20 Jan 2012 16:46:44 -0800
Subject: RE: [GrizHFMinimill] Re: Counterweight Arrangement
I'm of the opinion that we are not talking about similar mills. Would someone take a look at Grizzly's site and the specs on the small mill-drill and tell me if I'm off base discussing it in this group?
From: GrizHFMinimill@yahoogroups.com [mailto:GrizHFMinimill@yahoogroups.com] On Behalf Of SirJohnOfYork
Sent: Friday, January 20, 2012 4:29 PM
To: GrizHFMinimill@yahoogroups.com
Subject: Re: [GrizHFMinimill] Re: Counterweight Arrangement
The head itself weighs about 160 lbs so unless you have a mechanical advantage with a pulley arrangement, this is what the joist would see. Maybe I'm missing something?
The HF 44991 X2 mini-mill has a total shipping weight listed as 138 lbs. Mine came in a wooden crate that I picked up a the store and brought home myself at what felt to be about that weight. The X2 mill head weighs in roughly around 35 - 40 lbs.
Little Machine Shop's Air Spring Conversion Kit (currently on sale for $34.95) advertises the air spring details as per this sentence:
"This air spring has about 35 pounds of force. This is not enough to totally support the head, but it is a heck of a lot more support than the torsion arm provides."
So assuming their estimate of 35 lbs of force is about correct, then the head must be somewhat heavier than that, but not by a whole lot. I'd bet 40 lbs is a mighty close guess.
Maybe someone with a bathroom scale will set their X2 mill head on it and report back with what it weighs. In a perfect world, one member with an R8 spindle and another with an MT3 spindle would each do this, juts to see if there is enough difference to matter. :-)
I suspect a guesstimate of 160 lbs just for the head comes from someone with a much larger milling machine, seeing as that is more than the entire X2 mini-mill! :-) I do remember seeing a photo of a little X2 mini-mill sitting comfortably on the X/Y table of a much larger milling machine, but I don't remember where that was.... RH or something?
Cheers,
John Z.
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