 Why has no one ever mentioned Pferd grinding wheels? |
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| mbseto |
 Apr 28 2019, 10:09 PM
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#1
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Senior Member  Group: Members Posts: 1,257 Joined: 6-August 14 From: Cincy Member No.: 17,743 Region Association: North East States  |
I've been grinding welds with the aluminum oxide wheels I get in a bulk pack from HF and always dread doing it. It's slow and it's a drudgery. A buddy showed me one of these wheels and it is amazing by comparison. Knocks the welds down extremely fast and runs cool - no discoloration in the metal. Is anyone else using these?
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Replies(1 - 8)
| Front yard mechanic |
Apr 29 2019, 07:44 AM
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#2
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Senior Member Group: Members Posts: 1,348 Joined: 23-July 15 From: New Mexico Member No.: 18,984 Region Association: None 
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Interesting seems you get what you pay for ! I found 10 for 54.00 claim they run cooler last longer and leave smoother grinds (IMG:style_emoticons/default/welder.gif)
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| tygaboy |
Apr 29 2019, 08:04 AM
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#3
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914 Guru Group: Members Posts: 5,589 Joined: 6-October 15 From: Petaluma, CA Member No.: 19,241 Region Association: Northern California
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The biggest difference I've found is moving to high quality abrasives. 3M Cubitron made all the difference over the HF-level stuff.
And I've used those wheels but found they didn't offer me the level of control I wanted. I follow this process: - 3 inch air angle grinder w/ Roloc backer pad - 3M Cubitron abrasives - Start w/36 grit, use a steep angle and cut only weld material. Go SLOWLY. I used a "long-ish blip, blip" to keep accurate control over the cutting. Once "close" to the parent material: - Switch to 80 grit. Shallower angle, same go SLOW approach. - Once the edge of the weld starts to show a blend with the parent material: - Switch to 80 grit on a DA to do final blending. The 3M stuff cuts so quickly, I have yet to experience heat-related distortion. Pics of a recent repair using the above approach. Hope this helps. Also, a while back @McMark posted a vid of his technique when doing sheet metal repair. Maybe he'll point us at it... Attached thumbnail(s)    
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| McMark |
Apr 29 2019, 08:11 AM
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#4
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
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| tygaboy |
Apr 29 2019, 08:16 AM
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#5
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914 Guru Group: Members Posts: 5,589 Joined: 6-October 15 From: Petaluma, CA Member No.: 19,241 Region Association: Northern California
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(IMG:style_emoticons/default/agree.gif)
That's the one. A GREAT tutorial! Thanks, Teach! (IMG:style_emoticons/default/aktion035.gif) |
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| bbrock |
Apr 29 2019, 08:16 AM
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#6
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains
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Thanks for the tip! I stopped buying any sanding/grinding supplies from HF a long time ago because the quality is (IMG:style_emoticons/default/stromberg.gif), but didn't know about those Pferd wheels. I've used mostly DeWalt because they are available locally. They aren't anything special but way better than the HF wheels at least.
+1 on 3M Cubitron. Money well spent except for their 36g 3/8" sanding belts. I may have gotten a bad batch but totally worthless whereas the 80g belts are magic. |
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| Andyrew |
Apr 29 2019, 08:31 AM
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#7
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Spooling.... Please wait Group: Members Posts: 13,380 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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In our production shop we use Zirconia resin fiber disks. Cheap and replaceable.
A small disk lasts about 2 days and a big disk about a week. We use a 36 grit on a 7" disk to knock down a 2" weld and then a 50grit on a 4.5" disk to give it the final finish before an 80grit DA. I find that this is the best and fastest way to grind down a weld with minimum heat absorption to the panel. For my house I have a cutoff wheel and then a 60grit flap disk which I should change to a 36 grit. I find the flap disks to be the most universal for grinding/finishing as they are very forgiving and great for when im one handed upside down or whatnot. I typically go through one a year. |
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| preach |
Apr 29 2019, 02:45 PM
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#8
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Ridge Runner Group: Members Posts: 1,046 Joined: 27-March 10 From: Live Free or Die Member No.: 11,513 Region Association: North East States
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Another 1 for Cubitron. (IMG:style_emoticons/default/smile.gif)
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| mb911 |
Apr 29 2019, 03:20 PM
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#9
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914 Guru Group: Members Posts: 7,598 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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Cubitron is very very nice wheel.. We use 1000s of wheels at work 3m is the gold standard.. It also has a really cool history as to how they discovered it.
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