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2023-11: Warosu is now out of extended maintenance.

/diy/ - Do It Yourself

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2548977

Retard at my job site just arrived. Anonymous Tue Jan 24 07:49:30 2023 No.2548977 [Reply] [Original]

I've been using chop saws with abrasive discs for almost two years now, I've cut angle pieces, flat bar, tube, square tube, etc. and I've never had a problem with it. I always let the wheel regain speed a couple of times in between sections of the cut, specially at the end of the cut as to have a little burr as possible (I don't like filing or grinding that shit off).

Well this guy who just arrived presses on the machine really hard, almost to the point of stalling, his pieces are always with a ton of burr and they almost glow red hot, he tells me that while filing or grinding burr is bothersome, it's better for the disc and the machine.

I've read about how as the disc's diameter becomes smaller, it technically rotates at a lower speed and therefore results in less clean cuts, so I can't see why my method would be wrong, letting the disc gain more speed would result in cleaner cuts

Am I really in the wrong though? Am I the idiot here?

>>	Anonymous Tue Jan 24 08:50:28 2023 No.2548985 i hope retard's pieces aren't going to anything structural as "red hot" means the heat treat is now fucked

>>	Anonymous Tue Jan 24 10:55:34 2023 No.2549012 No, basic physics says the faster and lighter the cut the better fpr both the piece and the equipment.

>>	Anonymous Tue Jan 24 11:11:55 2023 No.2549013 >>2548977 This isn't fucking reddit. Fuck your updoots. You are the retard for even posting this question here. Faggot.

>>

Anonymous Tue Jan 24 12:12:46 2023 No.2549020

>>2548977
With normal cutting tools like an endmill on a milling machine, there is truth in running a tool harder will actually save tool life.
The same rules don’t apply to an abrasive disc.

In the end who gives a shit. If it were to make a tangible difference in disc life (which it doesn’t, it probably helps it) It takes less time to swap out an abrasive disc every once in a while than doing a second operation to remove burrs
Time is money.

As for the machines motor, it prefers having momentum going into a cut, not being bogged down as hard as it can be with no reprieve.
Just ignore his ass, don’t make your work harder for no good reason

>>	Anonymous Tue Jan 24 12:50:18 2023 No.2549029 >>2548977 You are all fucked up anyway. Inhaling all that nasty shit. Do yourself a favour and use cold saw or bandsaw. You cheap piss-poor stupid monkeys.

>>	Anonymous Tue Jan 24 12:51:54 2023 No.2549030 >>2549013 where did the "reddit" touch you anon?

>>

Anonymous Tue Jan 24 16:33:38 2023 No.2549121

>>2548977
While it depends on the tool and the setup. In this case I would assume you are correct.
1. letting the motor get up to speed and going slower puts less load on the motor
2. if the work piece is getting too hot it could have heat damage, depending on the application this could be a really big deal for liability
3. abrasion systems need a way to eject the build up of removed material, backing off and coming back can help with that
4. may save time overall depending on total time including grinding burrs and such
5. manual says to "ALWAYS EASE THE ABRASIVE WHEEL AGAINST THE MATERIAL when starting to cut. A harsh impact can break the wheel." (I think that is focus more on starting impact)
...
after more looking we have the real answer
Top left of page 11 in Manual clearly say you are correct.

"Once it reaches full speed slowly lower the “D” handle
until the cut-off wheel comes in contact with the material
being cut. Continue to use steady and even pressure to
obtain a uniform cut through the material. Never force the
wheel into the material being cut"

>>	Anonymous Tue Jan 24 19:22:50 2023 No.2549195 File: 41 KB, 465x660, 20230106_134052.jpg [View same] [iqdb] [saucenao] [google] Thanks /diy/. >>2549013 I am banned on plebbit for racism and transphobia though

>>	Anonymous Thu Jan 26 03:33:40 2023 No.2550018 >>2549029 You may be right, but I still laughed at this.

>>	Anonymous Thu Jan 26 03:46:32 2023 No.2550028 File: 568 KB, 626x492, tom scott when the kush hits content aware.png [View same] [iqdb] [saucenao] [google] >>2548985 >heat treat is now fucked >heat treat >mild steel

>>	Anonymous Fri Jan 27 18:22:46 2023 No.2550904 >>2548985 And how are these going to be installed? With a welder? Last I heard, these melt steel.

>>	Anonymous Fri Jan 27 23:07:09 2023 No.2551029 >>2550904 Nah man it's not jet fuel

>>	Anonymous Sat Jan 28 04:32:07 2023 No.2551179 My neighbor does this with his wood saw. He pulls the trigger and starts cutting, never letting it spin up then bogging through the whole cut. It sounds fucking horrible, please don't tell me this is some master technique.

>>	Anonymous Sun Jan 29 05:04:09 2023 No.2551711 https://www.youtube.com/watch?v=hid9bDnSeok

>>	Anonymous Sun Jan 29 05:26:08 2023 No.2551723 >>2548985 >i hope retard's pieces aren't going to anything structural Structural welders cut with acetylene, not a disc

>>	Anonymous Sun Jan 29 11:53:23 2023 No.2551859 >>2551711 >who'd have thought there was actually a technique Is he an idiot?

>>	Anonymous Sun Jan 29 15:53:08 2023 No.2551952 >>2548977 I hate the fuckers that do this shit. They fuck up the washers that holds the disk. Tell him that he is a retard for me.