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?
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Sent: Friday, January 20, 2012 4:29 PM
To:
Subject: Re: [GrizHFMinimill] Re: Counterweight Arrangement
On 1/20/2012 5:49 PM, Oliver Fick wrote:
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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