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scooby074

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I just saw that and corrected my post lol.

All thats stocked and used locally is just the original EF. Dont think Ive ever sold or even saw a Turbo edition.
 

scooby074

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Which grit do you run scooby?

The most course. 36 or 40.

Lately Ive flipped over to using the 3m Cubitron 982cx fibre disc in 36 to do the heavy cutting and those things are the cats ***. With a softish backing plate they will do 90% what a flap wheel does, faster, for 1/8 the cost. If something needs that extra "polish" I put on a flapper for the last bit.

Consider getting setup with the cubitrons and saving the expensive Enduroflex for fine finish work. The only place the cubirton fibre disc falls short is if youre in a spot where you can catch the edge of the backing plate on something sharp, for that EF and old fashioned stone wheels are needed, but on the flat its cubitron fibre all the way.
 
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Wamsutta

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The most course. 36 or 40.

Lately Ive flipped over to using the 3m Cubitron 982cx fibre disc in 36 to do the heavy cutting and those things are the cats ***. With a softish backing plate they will do 90% what a flap wheel does, faster, for 1/8 the cost. If something needs that extra "polish" I put on a flapper for the last bit.

Consider getting setup with the cubitrons and saving the expensive Enduroflex for fine finish work. The only place the cubirton fibre disc falls short is if youre in a spot where you can catch the edge of the backing plate on something sharp, for that EF and old fashioned stone wheels are needed, but on the flat its cubitron fibre all the way.
Is this the correct type of backup pad for that Cubitron 982CX fiber disc?

3M Backup.jpeg
 

scooby074

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Is this the correct type of backup pad for that Cubitron 982CX fiber disc?

3M Backup.jpeg

Its "A" type. I have those. Theyre quite rigid (stiff plastic). No backing rubber. No cooling fins. Youll need to supply a nut if you use those exact discs. Those backers are made to work with the TN discs like this

Cubitron™ II Fibre Disc 982CX Pro, 36+, Die TN450E, TN Quick Change,​

https://www.3mcanada.ca/3M/en_CA/p/d/v101239049/

Also have these made by Mercer, softer rubber backer . Cooling fins. I prefer these for blending and general purpose. Its what I use most times Dont gouge as much. Im sure there are other brands out there. 3m likely has one simular. Notice the center is dished so you can use the TN QA discs.

There are also very soft ones for blending. I have a Snapon one. You cant put much pressure down at all with it. Usually I use this one to blend tack welds around patches in sheet metal.

Walter makes backing pads of various stiffnesses too. They also make a grinding disc thats supposed to be the match to Cubitron, but I havent tried it yet.

Something to be aware of when mixing and matching pads and discs is mounting method. Ive used both conventional nut style and QA style (actually called 3M TN style). Some mounting styles arent compatible with each other and manufacturers dont really indicate compatibility too well.

The 3m 56573 ones you posted are compatible with the 3m TN QA threaded discs. Notice the recess in the bottom of the pad where the TN "thead" can screw in.

I believe the Walter 15-M 145 Flex backing pad (for example) is also compatible with the 3MTN discs. But only listed as compatible with walters Coolcut QuickChange 15-X 475

The Quick Attach (TN) stuff gets weird and propitiatory fast with very little documentation on cross compatibility. Even within a brand its hard to know which pad is compatible with with disc ( when dealing with QA). 3m alone has at least 3 mounting styles for discs, conventional nut, TN quick attach, GL quick attach. 3m had a little catalogue showing what mounts mixed with which backing pad for each stiffness, mixed with which specific disc, within the 3m family, but I cant find it.

Found it. Page 24. https://multimedia.3m.com/mws/media...M-Metalworking-Catalog-High-Resolution_R4.pdf
 
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Wamsutta

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Its "A" type. I have those. Theyre quite rigid (stiff plastic). No backing rubber. No cooling fins.

Also have these made by Mercer, softer rubber backer . Cooling fins. I prefer these for blending and general purpose. Its what I use most times Dont gouge as much. Im sure there are other brands out there. 3m likely has one simular.

There are also very soft ones for blending. I have a Snapon one. You cant put much pressure down at all with it. Usually I use this one to blend tack welds around patches in sheet metal.

Walter makes backing pads of various stiffnesses too. They also make a grinding disc thats supposed to be the match to Cubitron, but I havent tried it yet.

ok you got me confused now because the Cubitron fiber disc you posted shows a Roloc type " TN " quick change disc in 5 inch. 😁

I'm going all over the internet trying to figure how to attach a 5 inch Cubitron 982CX Roloc disc to my 5/8-11 right angle grinder.

I found that 3M backup pad I posted, but it's only coming in 4-1/2 inch.

"How is scooby mounting a 5 inch Roloc disc?" , I thought. :headscrat

I've tried the Cubitron 982C brown disc in 36 grit with the 7/8 hole, but when I take it off the backing pad and let it sit out overnight, it curls up into a taco shell and is a ***** to get back on using the flange nut. When I saw your link with the Roloc disc, I thought that might be the hot ticket because it would be a press-n-turn instead having to fight that taco shaped disc with the 7/8 hole and the threaded flange nut.
 
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scooby074

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ok you got me confused now because the Cubitron fiber disc you posted shows a Roloc type " TN " quick change disc in 5 inch. 😁

I'm going all over the internet trying to figure how to attach a 5 inch Cubitron 982CX Roloc disc to my 5/8-11 right angle grinder.

I found that 3M backup pad I posted, but it's only coming in 4-1/2 inch.

"How is scooby mounting a 5 inch Roloc disc?" , I thought. :headscrat

I've tried the Cubitron 982C brown disc in 36 grit with the 7/8 hole, but when I take it off the backing pad and let it sit out overnight, it curls up into a taco shell and is a ***** to get back on using the flange nut. When I saw your link with the Roloc disc, I thought that might be the hot ticket because it would be a press-n-turn instead having to fight that taco shaped disc with the 7/8 hole and the threaded flange nut.

Sorry. Just to confuse things, did you know there were at least 3 styles of Roloc connector from 3M, TR, TS, and TSM :lol: AND the 982C is available, in Roloc, up to 4" :lol:

1719362775755.png

These discs will curl like a pringle chip in humidity. From 3m they come in a resealable bag for this reason. Keeping them on a backing pad, on the grinder helps keep them flat between uses. Unused discs should remain in the sleeve and inside the bag.

Some companies provide a ridgid platter for their fibre discs, like the old blank 100 CD "towers" to keep pressure on them to keep them flat. Anything would work that will keep weight on top and reduce the humidity. Walter does for the Coolcutsxx in a 50. As does Sait

The 3m 56573 backer is ONLY available in 4.5". If you want to go larger (or get different softness) from 3m, you need to buy the 5/8-11 hub and whatever stiffness and diameter of backer you want as seperate pieces ! (Yay 3m).
1719363531694.png
This should be a 4.5 TN https://www.3mcanada.ca/3M/en_CA/p/d/v101239049/

5" https://www.3mcanada.ca/3M/en_CA/p/d/v101239002/

7" https://www.3mcanada.ca/3M/en_CA/p/d/v101239012/
 
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Wamsutta

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Sorry. Just to confuse things, did you know there were at least 3 styles of Roloc connector from 3M, TR, TS, and TSM :lol: AND the 982C is available, in Roloc, up to 4" :lol:
Yes I knew that. I can deal with the TR, TS, and TN mounting systems, but what I can't deal with are their backup pads. 3M is very mirky and foggy when it comes to their backup pads. I swear to you man, researching 3M abrasives is the hardest thing I've ever done on the internet. It's a deep dark rabbit hole that goes on forever with no end in sight. :eek:
 
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Wamsutta

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The one thing I've noticed about flap wheels is I can use the disc while it's almost flat; there's no center nut in the way.
 

Jswain

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Once you've tried a decent 36 grit fibre disc, it's a hard sell to go back to flap wheels. I love Walter flap wheels, and I have a sleeve of them, that have sat untouched since I started running VSM or 3m fibre discs.

So much cheaper & last a very long time. Of course if you're only using the edge of it, it will dull like anything would. If I have a lot of sharp edges I'll run a regular grinding wheel to get them half smooth then fibre disc for basically everything else.
 
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Wamsutta

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The 3m 56573 backer is ONLY available in 4.5". If you want to go larger (or get different softness) from 3m, you need to buy the 5/8-11 hub and whatever stiffness and diameter of backer you want as seperate pieces ! (Yay 3m).

This should be a 4.5 TN https://www.3mcanada.ca/3M/en_CA/p/d/v101239049/

5" https://www.3mcanada.ca/3M/en_CA/p/d/v101239002/

7" https://www.3mcanada.ca/3M/en_CA/p/d/v101239012/

I've got a 4-1/2 inch 3-piece 3M backer setup. I've used it for the few Cubitron discs that I've tried. It's the kind with the nut for the 7/8 hole.

It works ok but the nut is not deep enough for my Bosch grinder. I got the deepest nut they make and it's still not deep enough.

It's made for their own brand of pneumatic grinders I think.
 
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Wamsutta

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Once you've tried a decent 36 grit fibre disc, it's a hard sell to go back to flap wheels. I love Walter flap wheels, and I have a sleeve of them, that have sat untouched since I started running VSM or 3m fibre discs.

So much cheaper & last a very long time. Of course if you're only using the edge of it, it will dull like anything would. If I have a lot of sharp edges I'll run a regular grinding wheel to get them half smooth then fibre disc for basically everything else.
Yeah I want something that I can use the entire surface with. The one good thing about a type 27 flap disc is it's easy to use the entire surface because the center nut is recessed way up there out of the way.

The 3M Cubitron discs work great, but they don't last as long as I hoped they would. I think it might be my fault though. I think I may have contaminated them with mill scale. That mill scale is a gummy substance that clogs up the abrasives. I have since then switched to using a vinegar soak to remove the mill scale in an effort to save my abrasives.

I need to come up with a better backing system for my grinder if I want to continue using fiber discs.
 

scooby074

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I've got a 4-1/2 inch 3-piece 3M backer setup. I've used it for the few Cubitron discs that I've tried. It's the kind with the nut for the 7/8 hole.

It works ok but the nut is not deep enough for my Bosch grinder. I got the deepest nut they make and it's still not deep enough.

It's made for their own brand of pneumatic grinders I think.

Are you talking about 051141-28476-7 Hub + 051144-13325-3 Pad + 051111-51047-6 Nut ?

Yes, sometimes the stackup makes things tight, I alluded to this above. The one nice thing about the TN mount is it only needs about 1 or 2 exposed threads to tighten on, and you dont need a 051111-51047-6 Nut like you would with a standard disc with a mounting hole.

If you have the upper thick washer as used with a stone wheel, you can remove this to get a little more thread on the 5/8 arbour.

1719451746779.png
 

scooby074

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As long as there are a couple threads exposed in the circled area below, you can likely use a TN mount. Its recessed specifically for that. When installed, you can access the whole disc surface, with nothing exposed below the disc to block you, like a nut.

1719451921383.png
 
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Wamsutta

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Are you talking about 051141-28476-7 Hub + 051144-13325-3 Pad + 051111-51047-6 Nut ?

Yes, sometimes the stackup makes things tight, I alluded to this above. The one nice thing about the TN mount is it only needs about 1 or 2 exposed threads to tighten on, and you dont need a 051111-51047-6 Nut like you would with a standard disc with a mounting hole.

If you have the upper thick washer as used with a stone wheel, you can remove this to get a little more thread on the 5/8 arbour.

1719451746779.png
This is what I have :

3M 28476

3M 28443

3M 02618

3M 27400

My Bosch grinder must have a shorter shaft than what the 3M three piece system is designed for; that's why I thought about trying the TN system.
 

Jswain

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This is what I have :

3M 28476

3M 28443

3M 02618

3M 27400

My Bosch grinder must have a shorter shaft than what the 3M three piece system is designed for; that's why I thought about trying the TN system.
This style(not specifically Walter) is all I ever use with the regular fibre discs with a hole.

Walter Surface Technologies 15D044 Backing Pad Assembly. Abrasive Wheel Pads https://a.co/d/05rSb6ZC
 

scooby074

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This is what I have :

3M 28476

3M 28443

3M 02618

3M 27400

My Bosch grinder must have a shorter shaft than what the 3M three piece system is designed for; that's why I thought about trying the TN system.

Ok. Thats the normal 3m stack. How much thread is exposed after the hub 28476 is threaded on? Are you threading on the nut as pictured below? The nut should be flush with the cutting surface of the disc.

1719453866779.png
If you have it assembled as above and still cant thread on the retainer nut, there is a different hub you can use that has an extended 5/8 threaded stub, PN88743 051144-88743-9 See below

1719454129064.png

 
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Wamsutta

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How much thread is exposed after the hub 28476 is threaded on?
About 1/4 inch from the flat part of the hub to the end of the shaft. The shaft is still below those tri-wing things.

The total length from the gearbox flange to the end of the shaft is 15/16 inch.
 

Jswain

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How stiff is that orange backing pad? Is it in between the stiffness of the white pad and the black pad?
I've only used the orange Walter and a black Bosch I believe is what I have on now. Walter was more plastic and Bosch is more rubber. I think the backing pad is less important then the discs, within reason.

If you really want to feather something I could see having a more flexible pad with some finer discs but honestly I have 0 troubles making **** basically flat as glass or hogging out materials with either of those and 36 grits.
 
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Wamsutta

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Hey scooby - Before I order the 3M short shaft adapter, are you sure sanding discs are better than flap wheels for grinding down welds flush?
 

scooby074

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Hey scooby - Before I order the 3M short shaft adapter, are you sure sanding discs are better than flap wheels for grinding down welds flush?
To me, 100% yes. Those Cubitrons are something special IMHO. Bear in mind, that they do have limitations when grinding into tight corners or where there is a sharp edge to hook on the backing pad, other than that, no complaints, and they definitely cut faster than the EnduroFlex I have.

Heres my 2 grinders set up with discs. One is a standard 3m 36 grit with nut on the Bluepoint, the other is a cubitron with TN . Enduroflex in the background on the bosch. The cubitron is the TN mount, you can see how flush it is with the bottom of the arbour, it only needs about 2 exposed threads. Are you sure you need the short shaft adaptor?

1719886164158.png
1719886242761.png
 
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Wamsutta

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The way they have it setup on this grinder is not good. Not enough threads engaged with the nut.
Walter Xtracut.png
 
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Wamsutta

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Just to update this thread, I got the 3M hub in the mail last week and mounted it on the Bosch 1375A grinder. It works perfect for that grinder. The Walter Coolcut ** discs work extremely well at removing metal. I'd say at least twice as fast as a 3M Cubitron grinding wheel if not even faster. You can feel it "Grab" the steel. The trade off being that the life is short lived compared to the Cubitron grinding wheel.

I can remove maybe 6 welds before the sanding disc is toast. The Cubitron grinding wheel in comparison will last days on end.

The Walter sanding discs are $2.76 a piece locally. They are definitely the way to go if you want to remove welds real fast and you got loads and loads of money.


3M Hub 88743.jpeg
^ 3M 88743

3M Face Plate 28443.jpeg
^3M 28443


3M Hub Nut 05620.jpeg
^ 3M 05620

Walter Coolcut XX.jpeg
^ Walter 15-X 453
 

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