3M Cubitron II Grinding Wheels

[Wamsutta]

I have found that these are the absolute best grinding wheels for grinding welds made out of ER70S-6 MIG wire. The wheels cut very aggressively and fast compared to other brands I've tried such brands as SAIT and Bosch. The 3M wheels cut twice as fast. I hope this helps someone out who has to do a lot of steel grinding. The price of the wheels can be very steep, but I managed to get one priced on eBay at $14.99 for $11.00 as a "Make Offer" bid with free shipping.

 

[mrklean]

I concur, 3M rep showed up at our door in my previous career and handed us several. He was trying to compete with our religious use of Klingspor abrasives. Unfortunately, the price just didn't add up for us.

 

[Hohn]

Have you tested these against the Pferd Victograin? I think the Pferd is considered to be very good as well, but I'm pretty sure the consensus is that Cubitron is tops. I'm just wondering how close the Pferd gets and how durable it is vs the cubitron vs how much they cost.

I'm also looking at the Walter stuff which gets rave reviews.

 

[KSJeff]

That's what I use exclusively. I get them off Amazon. I keep one grinder with that for grinding and one with a weiler Roughneck Max stringer bead wheel. Haven't found anything better and this is not an area where I want to save money. Media matters.

 

[bdbecker]

You won't regret that purchase. For a number of years, I was in charge of consumables for a pretty good size weld shop. I've tested dozens of different discs from various manufacturers and 3M wins every single time when you look at the whole picture. Purchase price, lifespan, cut speed, number of disc swaps, etc. all were factors that influenced our decision.

That being said, I'm not a 3M fanboy. Yes, I've got a few of those discs in my home shop, along with several other brands. The thing to remember is that all my testing was focused on use in a production weld shop where every minute counts. For a home hobbyist, you'll likely not notice much of a difference besides cut speed. I'd even argue that durability is less important. If you buy a disc that cuts just as fast, but costs half as much and lasts half as long as the 3M, it doesn't matter if you have to swap out discs twice a month vs. once a month.