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Milling from a sheet

How do I pack up a sheet to mill?

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Andrew Johnston09/11/2011 16:48:51
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Posted by The Merry Miller on 09/11/2011 15:03:09:
 
Anyone remember the "Goscut", that could manage 1.0mm bms easily.
 
Len. P.
 
No, never 'eard of it; obviously not old enough!
 
What is it then?

Regards,

Andrew
Clive Hartland09/11/2011 16:58:35
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It was a hand shear that had a central blade and the body acted as the anvil and you progressed the cut and a long curling piece of metal came out about 2mm wide.
It was a very tiring tool to use for long periods and I am sure it has caused me a lot of trouble with my wrist.
You could change the blade for a different cutting angle. ie curves.
You were able to adjust the width of the slot to accomodate the curves you were cutting.
Like a lot of tools it came out as a handyman thing and I bought one and had it for years but I dont know where it is now.
It would cut 1mm steel or 1.5 Alu. Dont know about braas though.
 
Clive
Clive Hartland09/11/2011 17:09:36
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Geoff, set up the piece of plate with a thick cardboard under it of the same size, place it over one of the Tee slots on the table and clamp it both ends, cut along the edge, the cutter can go in the T slot.
This will give you one straight edge to work from, deburr the cut edge and then rotate the metal and measure your width and cut again.
Again deburr the cut edge, rotate the metal and using a square set it up again over a T slot and repeat the cut, deburr and rotate 180 and measure length and finish the last cut.
Job done, I used this method on an engraving machine and it works fine.
To be extra careful, use three clamps, one each end and one at the middle of the rear edge.
This method will not cause any problem with the tool on the table surface.
 
Clive
The Merry Miller09/11/2011 19:37:08
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I've found it!
 
The cutting edge had very fine teeth, and this blade was one of three each used for different materials. Where the other two went heaven knows.
 
 

 
 
Len. P.
JasonB09/11/2011 19:56:32
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Clive surely Geoff's reason for doing it on the mill is so all 4 edges can be cut at one setting so ensuring all corners are square, by moving it after each cut there is more potential for error. Provides teh size was within the mills x-y capacity I would do it without disturbing the work if possible.
 
J
Clive Hartland09/11/2011 21:14:06
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The point I was trying to make Jason was to get the piece cut out without a lot of complication, dressing it up after to acceptable squareness is quite easy.
There is a way of improving the parallelism, put a straight piece of metal in one of the slots and with a couple of screws through it force it against the edge of the slot.
This then acts as a fence to put the good edges against ensuring that the opposite sides are parallel.
Using a square to set it the other way will give acceptable accuracy, it always has for me anyway.
 
Clive
wheeltapper09/11/2011 22:00:29
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Posted by Clive Hartland on 09/11/2011 16:58:35:
 
 
 
SNIP Dont know about braas though. SNIP
 
Clive
 
 
theres got to be a joke in there somewhere, I just dont think I dare.
 
Roy
Clive Hartland09/11/2011 22:05:50
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my keyboard is a bit diffy and I must replace it as its about 5 years old.
Anyway Bras is not spelt braas is it?
 
Clive, a sensitive soul!
Nicholas Farr09/11/2011 22:08:51
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Hi, (also sorry to digress) but after reading the posts about the "Goscut" I just had to go and find mine, which was originally my late farthers. My one has the last blade that I used in it some, can't remember, long time ago, the other two blades are somewhere in an old toolbox, no doubt. The first picture below shows it in action cutting a piece of 0.4 mm shim steel, and the secound with the piece of shim steel cut in two, with the resultant curl of steel that Clive mentioned. I agree with Clive that they were a bit hard on your hand if used for any lenth of time, but they were revolutionary when they first appeared for the DIY'er.
 
 
Regards Nick.
The Merry Miller09/11/2011 22:20:41
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Just seen a lovely set on Flea-bay for £18, just right for the connoeseur.
 
Len. P.
 

 
 
 
wheeltapper09/11/2011 22:32:24
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Sorry Clive, I couldn't resist that.
 
 
I've still got my dads goscut somwhere with all the blades and I've got a 'nibbler' that fitted on the end of an electric drill.

Roy.
Anthony Knights10/11/2011 10:07:27
681 forum posts
260 photos
I remember using a nibbler tool called a "MONODEX" back in the 80's, which looked as if it worked on the same principle as the GOSCUT. Just Googled it and you can still get them.
Ian S C10/11/2011 11:23:03
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I have a pair of shears that work on the same principle, but the mechanics of the tool is the same as Aviation Snips, can't remember where they came from, they take out a strip about 3 mm wide. Ian S C
Peter G. Shaw10/11/2011 11:32:38
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The problem I find with the Goscut, is that it gives a slightly crinkly and bent edge to the metal which thus requires filing down. Otherwise, as others have said, it can be tiring to use.
 
Useful in the main for shim material only.

Peter G. Shaw
Billy Mills10/11/2011 15:13:45
377 forum posts
The Monodex nibbler has an easier action than the Gosscut and will nibble thin steel very well. The big disadvantage with nibblers is that they tend to mark both sides of the cut.
 
Electric and air nibblers can be very useful in roughing out however the little crescent nibblings are very sharp and nasty!
 
Billy.
alan frost10/11/2011 15:30:36
137 forum posts
3 photos
I don't usually join in these reminiscing sessions I'm far too young at 68, but I never throw anything away and as cutting large sheets is a perpetual challege I have a working Goscut (mit all blades and instructions), a monodex, a nibbler, two reciprocating saws , several angle grinders and of course the usual array of machine tools with relevant accessories. Which one gets used depends on thickness and size of sheet ( or young plate ). I'm not a model engineer and sometimes need to cut big sizes from thick sheets altho my full size Titanic has been put on hold until I can get some bending rolls able to tackle 3 inch plate in very large sizes (they did exist ).Firm in I think Kilmarnock made them and probably others too. Legend has in when rolling a 3 inch thick 10 feet by 10 feet plate the rumble was held and felt in Australia (I made that last bit up).
Agree with Billy about nibblers and its the very devil to clamp a straight edge to a large sheet to work against. The vibrations always loosen the clamps (although they can only be heard in S. Liberia ). I made that last bit up too.
The reciprocating saw is amazingly good for sheet/Plate thicknesses over say about 2 mm , the thicker the better really altho also slower. Zero distortion too and almost zero heat. Does loosen your teeth a bit.

Edited By alan frost on 10/11/2011 15:32:06

Edited By alan frost on 10/11/2011 15:39:04

john jennings 110/11/2011 15:32:44
69 forum posts
 
I have two handles and a selection of blades which are not infrequently in use .

The Goscut is still a useful little tool for small jobs and if carefully adjusted to the correct (i.e. that which works best) clearance can give quite reasonably flat results. Apart from using it as a cutting tool it is also good at nibbling bits out of the side of sheet metal especially aluminum.
 
Like the Workmate it was an inventors tool (Mr Gos?) and eventually was bought up by a bigger manufacturer and then disappeared. It was quite good value at about 30 old shillings (£1.50)
 
 
John
alan frost10/11/2011 15:59:31
137 forum posts
3 photos
Clive , I think you'll find the spelling braa is used for especially fine big girls as Eccles would have called them. Wish the Goscut had been around when I was courting.
The Merry Miller10/11/2011 16:09:54
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Surely Alan you wouldn't have needed that for a nibble!!
 
Len. P.
 
alan frost10/11/2011 16:48:59
137 forum posts
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If anyone is after a goscut the ebay set noted well above looks a fine set although I don't know that elfin pastry would be too happy about the box being untested.
Len, nibbles were, alas, not so easily obtainable in the late 50 s.

Edited By alan frost on 10/11/2011 16:50:45

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