Re: [CAD_CAM_EDM_DRO] Re: Bridgeport Questions **JOHN.... PLEASE READ**

Those laser tables look nice and big. Do you supply people with CNC
equipment? You mentioned assembling the cutters. The resonator is obviously
specific to the task at 4000 Watts but you should see some of the resonators
you can get. I think the biggest industrial one I saw a picture of was over
20 kW, that made things warm when it was going to say the least. I don't own
the mill yet, we're really going to the auction on the off chance it'll be
in good shape and no one is really there for the smaller time consuming
stuff. There are a lot of Bridgeports there actually, if Ian or John S. want
I can send you the catalog to have a look at. The auction is just east of
Manchester on the skirt of it. I hope to be going myself but it depends on
other people because I can't drive yet and I'm not catching 500 different
broken / delayed trains to get there, no matter how much free coffee I get.
The auction is this Wednesday, viewing is tomorrow. I'll have a look for
some Hiab cranes, they'd be able to get it quite close to the garage as
well. I have been quoted £200 - £400 for haulage (A whole 45 minutes
driving!) which I would think would include be one of these cranes. Ian
suggested a skip truck, they'd probably be cheaper and they'll be rated to a
few tons I'd think. I'll phone a few of them and see what's what.


Thanks for all the help, I'm staying un-squashed for life,
John

> --- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:
> > alan_hantke@i... wrote:
> >
> > > Hi John:
> > > I felt that I had to make a comment about using a liftgate to
> move a mill.
> > > I have the greatest respect for Jon Elson, but in this case I
> wanted to add
> > > to his suggestion. In a word, be *very* careful! These are
> considerations
> > > you should review:
> >
> > <snip>
> >
> > Well, the local truck rental outfits here must have a better class
> > of lift-gate trucks than in Alan's area. Definitely make sure the
> lift
> > gate is capable of handling your machine, and then some.
> >
> > The one I rented was rated for 5000 Lbs, and it was so stiff and
> robust
> > that the gate didn't react at all when the Bridgeport was slid out
> onto
> > the gate!
>
> John,
> May I add some points from someone in the UK who does this as part of
> his living?
>
> Firstly forget the tail gate idea full stop. Here in the UK the vast
> majority of tailgates are only good for 1,000, 2,000 or 3,000 lbs
> which is below the weight of a Bridgy. Also as someone has pointed
> out they do lean backwards and the controls are usually electric
> solinoid valves - not an easy way to regulate a load.
>
> Wreckers are also out. Here in the UK we tend to have very
> specialised vehicles on this job. Smaller ones are just spectacle
> frame lifts. Medium sized ones are the tye with the tilting and
> sliding back. Not a good choice with a top heavy machine like a
> turret mill. Large wreckers usually have twin hydraulic winches and a
> very heavy duty lifting beam that fastens to the front axle of the
> broken down truck. Boom wreckers are very rare here.
>
> But the good news is the UK has loads and loads of Hiab crane equiped
> vehicles. Virtually every builders merchants has a truck with one on.
> I live on the edge of a small industrial estate and there are at
> least 15 such vehicles in less than a square mile near me. Look for a
> smaller operation as they are usually more flexable. The size matters
> and you will need a 7 ton Hiab. This is because they are always
> measured at 1 metre radius so a 7 ton machine will be 3 ton at about
> 3 metres and 1 ton at 5 metres.
> The smaller Hiabs are rated at about 3 ton and go up to about 80 ton,
> remember this is all at 1 metre radius.
> Hiabs are far superior to fork lifts because with a Hiab the load is
> hanging and short of a sling snapping it can't go anywhere. With a
> fork truck it can always tilt and fall or slide off the forks.
> Last point if you are lifting on the eye supplied with a Bridgy
> remove the eye and check the threads in the ram and on the eye bolt.
> I have had it where someone has cut the threads short on the bolt and
> it's only been screwed in a couple of threads.
>
> PS. If anyone is interested in my credentials go to
> http://www.bystronic.com and look at the big Bystar laser cutters.
> These come from Switzerland on three full size 42 ton artic loads and
> we get 3 days to assemble them.
>
> John Stevenson.
>
>
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