Extending the capacity of a machine vice

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philf:

--- Quote from: Baron on March 23, 2014, 07:28:12 AM ---Interesting concept. I would imaging very adaptable to suit most clamping devices. Certainly ideal for flat plate.
One thought though. How much would jaw lift affect the work piece ? Particularly if you needed parallel surfaces.

--- End quote ---

Hi Baron,

I don't expect it to be dead parallel but for squaring off ends or spotting hole positions it's fine.

The vice is pretty good having a dovetail slide which, if set on the tight side, doesn't exhibit much jaw lift but if you are trying to machine something dead parallel then the mill is probably not the right machine.

Cheers.

Phil.

BaronJ:
Hi Phil,

Unfortunately my mill vice is an ancient "Record 414" that I bought some 40 years ago. :palm: It had various bits of surgery in the intervening years. Whilst a perfectly good vice it has about 1 mm of play under the moving jaw. I did try to rectify this by fitting 1 mm thick Mylar sheet underneath but it makes the jaw very hard to move, particularly when unclamping the work piece.

But I do like your idea. I hate the thought of marking machine tables when machining.

philf:
I see Arceurotrade are now selling "ARC Versatile Milling Vices" which have used the same idea for extending the capacity of a machine vice. They have expanded on it by giving a few more possible positions for the jaws.

http://www.arceurotrade.co.uk/Catalogue/Workholding/Machine-Vices#ARC-Versatile-Milling-Vices-with-swivel-base

Phil.

John Stevenson:
Hardly your idea Phil :med:

Been around for years, my small Abwood was converted years ago and we had already been to the factory in China to talk about the designs and mods the previous year from your initial post.

Still a good doge though.

This is the large one positioned on the table to match the fixed jaw on a 6" Abwood and fitted with an alternative set of jaws with vee grooves in [ at present not in stock, this is one of the prototype vises ]

Bit of a shaky camera phone pic but this one shows the small 100mm swivel with extended jaw openings.

Actually down there today picking a couple more of the 100mm ones up and they are nearly sold out.

philf:
Hi John,

I've reworded my post slightly.

I had never seen it done before so the mod to my vice was entirely my idea!

I wasn't trying to infer that Arceuro had pinched the idea I just thought the vices looked very useful.

As is pointed out you wouldn't want to do any heavy milling in the alternative positions.

A question - I like the idea that the moving jaw is forced downwards but are both ends of the screw anchored? I would think that there would be a tendency to lift the screw. (Or does the nut run in a guide which prevents lift?)

Cheers.

Phil.

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