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Angle grinder stand usage

Question about grinder disc position over part to cut

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Chris Mate24/01/2023 00:40:35
325 forum posts
52 photos

Hi, I once baught a 2nd had anglegrinder stand, and this weekend decided to put it in use and realy like it doing small stuff cuts. I also made it spark proof with covers, so no more waste over the shop.

My question now is, what do you suggest is on how to position the grinder disc wheel centre over the work to cut:
1-Before centre of work-?
2-On centre of work-?
3-Over centre of work-?

Which is the way to go, I could not find the answer I am looking for on Google.

David George 124/01/2023 06:38:39
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2110 forum posts
565 photos

Hi Chris a picture of the grinder and stand would help but I think you should use it like a bench grinder with a suport on center height. That way the grinding force is going downwards and you can have the support either side of the wheel as well which will suport the part you are grinding as you push if backwards.

JasonB24/01/2023 07:27:14
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25215 forum posts
3105 photos
1 articles

As most stands have the grinder move in an arc I doubt it will stay in one position throughout the cut and then that will change as the disc wears.

I'd probably try to avoid cutting too much with the grinder over ctr and towards the operator as that could tend to draw the grinder into the work a bit like climb milling or lift it out of the vice. So pack out between work and rear jaw when cutting small items.

Nicholas Farr24/01/2023 11:57:27
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3988 forum posts
1799 photos

Hi Chris, the instructions that came with mine says the adjustments should be made to put the centre of the disc over the centre of the workpiece. As JasonB has pointed out, the disc will cut in a slight arc, which will be away from the operator. If you have it behind the centre of your workpiece, it will have the tendency for the forces at the start of the cut to put the load more onto the movable jaw, which you should not do. Starting with the disc on centre will give an equal pressure to the centre of the work and most of the force will be down into the base and once the cut has started, providing it is adequately held, should not have any tendency to roll or flip-up and the cutting forces will be shared mostly by the base and the fixed jaw. If the workpiece is not adequately held, the disc will have the tendency to roll or flip the workpiece in the front, behind or on centre, but if it is behind, the chances are it will roll or flip-up the workpiece and out towards the operator.

on centre cutting.jpg

Regards Nick.

Dave Halford24/01/2023 12:17:51
2536 forum posts
24 photos

On centre is fine till you cut thin stuff, then the disc disappears faster than it needs to.

Chris Mate24/01/2023 21:19:49
325 forum posts
52 photos
Posted by Nicholas Farr on 24/01/2023 11:57:27:

Hi Chris, the instructions that came with mine says the adjustments should be made to put the centre of the disc over the centre of the workpiece. As JasonB has pointed out, the disc will cut in a slight arc, which will be away from the operator. If you have it behind the centre of your workpiece, it will have the tendency for the forces at the start of the cut to put the load more onto the movable jaw, which you should not do. Starting with the disc on centre will give an equal pressure to the centre of the work and most of the force will be down into the base and once the cut has started, providing it is adequately held, should not have any tendency to roll or flip-up and the cutting forces will be shared mostly by the base and the fixed jaw. If the workpiece is not adequately held, the disc will have the tendency to roll or flip the workpiece in the front, behind or on centre, but if it is behind, the chances are it will roll or flip-up the workpiece and out towards the operator.

on centre cutting.jpg

Regards Nick.

Thats how I have it currently, I made T-Nut strips, then cut off the lenghts.
When I had a new blade on(The thin ones) initially it cut like butter. Then after I made the covers and use it further I find that a certain amount of constant pressure cute very good, as appose to too light pressure it glaze the metal and dont cut well, as well as you put too much pressure, its a 750Watt angle grinder.

Seeing a spring is not linear I was thinking removing its own retrack spring, add the correct weight to apply the correct pressure for a good cut, then use a safety trip switch with reset like a horizontal saw going down.

Edited By Chris Mate on 24/01/2023 21:20:32

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