Poly strip discs for angle grinders

[Triumphman]

Thoughts, uses, best prices for please?

 

[rtbcomp]

I've used these to strip paint from metal

https://www.beal.org.uk/drill-bits-abrasives/abrasives/polycarbide-disc-115mm-4-5.html

 

[Triumphman]

Do they take metal off or just rust and paint?

 

[Ashley Burton]

Do they take metal off or just rust and paint?

Just Paint

 

[rtbcomp]

Just rust & paint in my case, but I didn't try pressing harder. Not as aggressive as a grinding disc, but don't clog like a normal disc you'd use with a backing pad.

 

[Brad93]

I've used Norton and Flexovit. Bout the same performance wise. Still far too expensive. A ceramic 36grit doesn't clog, and lasts longer. You touch an edge with these things and its game over.
Good on paint and scaley rusty. No where near as good as they claim on millscale.

 

[Triumphman]

Do they last quite well?

 

[Brad93]

Do they last quite well?

Crap

 

[Triumphman]

What’s best for stripping without taking metal off?

 

[rcx132]

I still use poly discs. They are fast and I don't think they take much metal off. Just don't stay in one place more than a second to keep heat down.

In do what I can with the poly discs. Then I use my MBX tool. And what's left gets removed by sand blasting.

Poly discs will remove a bit of rust but anything serious I don't think they do.

 

[rtbcomp]

Mine lasted ages. I used them to shift the bulk of paint on panels before blasting, to keep the heat and distortion down.

 

[500e]

@rcx132 how do you get on with the MBX?
Are running costs reasonable \ life of bristles etc

 

[Triumphman]

Mbx?

 

[frank horton]

I use em for paint and light rust removal.......plus to polish up brake disc's mouting faces having rotary wire brushed before hand.......for acuracy when mounting on my brake lathe.......

 

[rcx132]

@rcx132 how do you get on with the MBX?
Are running costs reasonable \ life of bristles etc

I'm happy I have it and it's a very useful tool. I think if it was a £200 tool then I'd recommend it to everyone. But it's a £350 tool...
It removes rust like sand blasting but it's a bit less effective at getting rust out of pits than blasting and it's a bit slower. I also think it's a bit dearer to run than sand blasting when comparing cost of brushes vs media.

There is a £200 Chines copy version if someone wants to try it!

 

[rcx132]

Mbx?

It's a "surface prep tool", looks like a wire brush but uses sharp tempered brushes so you get a blasting effect. There's only a few companies that make them, the original Monti MBX, Snap On's Crud blaster, and a few more brands, including two Chinese brands.

 

[Al Strachan]

recently stripped the sills of a Nissan Navara completely bare. minor corrosion, but wanted to start from bare metal and remove paint/stonechip only and leave the metal underneath well alone.

4.5" poly discs (abracs) did a fantastic job, but as a guide I used 1 disc per side.

 

[Wallace]

All the discs I’ve used have been great on paint and light surface corrosion and they take a bare minimum of metal off leaving a nice shiny finish. As Brad says, keep away from edges, woolly jumpers and skin. Not that I would know......

I’m choosy what I use them for as they are expensive and don’t last long, they’re the call girls of the metal preparation disc world!

 

[eLuSiVeMiTe]

Used to use them with a company I worked for removing paint from old sash windows. With timber especially keeping them true to the workpiece is critical or you end up digging holes.

I gave up using them pretty quickly. Dusty noisy and no faster than using a linbide scraper. Used them mainly for taking the resin and fillers back to flush quickly instead of a lot of sanding.

Never tried them on metal. Might have to order a box up

 

[Wallace]

One drawback, I find there’s a natural tendency to use them at an angle so you end up with an unused portion near the centre and depending on what grinder they’re on the spindle & nut stops you using them flatter. Spacing the disc out helps but being so thick they spit bits out past the guard on par with a twisted knot cupwheel. I keep an old Homebase grinder for the worn ones.