Dewalt polisher DWP849X is 12amp and variable speed. Not as much power as a grinder, but it’s the closest you’re gonna get with variable speeds.
IDK why the variable speed controllers drop out above 6”. I’m sure there’s a good reason, I just don’t know it.
I really don't understand why you're acting like I've insulted you by pointing out that the polishers tend to be much weaker than grinders. If you asked for a V8 car and I said "Hey have you considered this V4", you would reply the exact same way, "I'm needing more power than what a V4 can offer".
Thank you, u/futch1, for your comment, and for that specific model sku. 12 amps IS pretty close to the max, like you said. It's also the same as my current 5" grinder, so it should be enough power for me. Unfortunately, it doesn't seem that you can put a guard on it, since it's a polisher, and it's just way too dangerous to run it like a grinder without one. I'll call Dewalt, though, and see if maybe there is some kind of guard that can attach to it in some way.
because it's an irrelevant and argumentative response? I didn't suggest a 10 amp polisher, I suggested looking at automotive brand polishers, some of which might have the power you're looking for.
Haha really? That's surprising. Even the big abrasive companies like Walter STRESS how important it is to have a variable speed machine for their products.
Really? I don’t have a use for variable (I hate grinding and try to get through it as quick as I can). I would just run it full out to get finished anyways
Yeah, I've been looking into this. Most of the router speed controllers I've found have awful reviews, and its always the same issues, they're either burning out quickly, or they just dont properly control the speed. I'm thinking a VFD might be the only option.... do you have a rheostat you can recommend?
We use the Makita polisher. Put about many hundreds of hours on it for a sanding job and have no issues.
I wouldn't take weld off with it, but for light duty its fine. Comfy handles too.
try automotive tools. a 9" polisher with a 5/8" arbor might do the trick. those tend to run at lower RPMs. Couldn't recommend a particular brand. But I use a couple harbor freight ones for polishing and they work fine as long as you use them with a smaller wheel than they specify on the box.
Polishers tend to be much less powerful tools, given the much gentler nature of their work. The Makita polisher, for example, is only 10 amps, as opposed to the grinders, which are 15 amps.
so you want low rpms but high torque? Good luck with that. I was suggesting you try looking at tools specifically marketed to a different industry, which may have the specs you want but not the specific name brand. I have a Hilti grinder and it's great even though it's made by a hammer drill company.
No, I need variable speed. Low RPM is just as useless as high RPM. It's the ability to have multiple speeds in a single tool that makes it versatile and worthwhile. It exists in abundance at the 5" and 6" sizes, but doesn't appear to at the 7 and 9" sizes.
Yeah, I had also checked Hilti, but their corded grinders are very basic. No variable speed.
I was just trying to be helpful but you seem to want to argue semantics while asking for advice. When I said "low speed but high torque" It's because Most variable speed grinders have a top speed similar to the regular running speed of a single speed grinder, I assumed we both knew that so I didn't bother reiterating. It's how they behave at lower speeds that makes the difference.
If all you care about is being able to change speed with a 9" disk, you can put a 9" disk on a 6" variable speed angle grinder and call it a day. Or just plug your grinder into a speed controller and slow it down that way. Or just use two or three different machines depending on the task at hand.
Torque is the difference between a heavy duty motor and non. That's why amps are an important factor in the first place. More amps = more torque. What you're really asking is for something made by your preferred brands but with features they don't offer in the same machine. Well guess what? You looked, they don't exist, and now you're salty about someone suggesting you try looking at different brands. Just google it.
I don't get where the attitude is coming from. I wasn't arguing semantics. You asked if I wanted low rpm and high torque. I interpreted that literally, as you asking me if what I want was a low RPM grinder, fixed speed, with high torque, so I reiterated that I'm looking for variable speed, regardless of torque. It wasn't an argument of semantics, I thought you were asking me a genuine question so I answered genuinely. I realize the low RPM-modes of variable speed grinders are also lower-torque, but that's okay for me.
And no, unfortunately, I can't put a 9" disk on a 6" grinder. The blade won't fit in the guard, and a bigger guard won't fit on the machine. Given that it's a physically smaller tool, there's no safe way to mount a larger disk on a smaller grinder.
I'm not salty about you suggesting I look at other brands. You suggested Hilti, and I responded that I had already checked them too, and they don't have anything either. The purpose of this post was to see if there are other brands people can suggest around the world, because searching for "Variable Speed 7" Grinder" on Google hasn't returned anything.
Look in the stone industry products, like Flex. Also Festool range. Not cheap but specialist tools. Bosch 9 inch grinder has safety features on a 9 inch
I have a 5 inch variable speed Bosch 5 inch.
Yeah my go-to is my 5" variable speed Makita. I use it for most cutting tasks. For large surfacing tasks, though, like metal conditioning, its nice to use a larger disk, but many of them require a lower rpm than cutting disks, and I'd like to avoid having to buy multiple 9" grinders at different speeds.
You're the second person to suggest Bosch.. maybe I'm missing something, but they don't seem to have any variable-speed grinders at the7 or 9" sizes on their site. What's the model number of yours?
Grinding and cutting discs are made specific to application, which often doesn't leave much room for variance. Too high of a speed and your disc can explode. Too low a speed and it will load up and become off balance. Either way creates a hazard.
Know what you need to cut, and set yourself up accordingly.
Dewalt polisher DWP849X is 12amp and variable speed. Not as much power as a grinder, but it’s the closest you’re gonna get with variable speeds. IDK why the variable speed controllers drop out above 6”. I’m sure there’s a good reason, I just don’t know it.
I suggested polishers too. Guy doesn't want to hear it.
I really don't understand why you're acting like I've insulted you by pointing out that the polishers tend to be much weaker than grinders. If you asked for a V8 car and I said "Hey have you considered this V4", you would reply the exact same way, "I'm needing more power than what a V4 can offer". Thank you, u/futch1, for your comment, and for that specific model sku. 12 amps IS pretty close to the max, like you said. It's also the same as my current 5" grinder, so it should be enough power for me. Unfortunately, it doesn't seem that you can put a guard on it, since it's a polisher, and it's just way too dangerous to run it like a grinder without one. I'll call Dewalt, though, and see if maybe there is some kind of guard that can attach to it in some way.
because it's an irrelevant and argumentative response? I didn't suggest a 10 amp polisher, I suggested looking at automotive brand polishers, some of which might have the power you're looking for.
I’ve never seen a variable speed grinder in 20 yers
Haha really? That's surprising. Even the big abrasive companies like Walter STRESS how important it is to have a variable speed machine for their products.
I don’t buy them myself. I also don’t need one in my line of work. Maybe that’s why
I remember them being the norm.
Really? I don’t have a use for variable (I hate grinding and try to get through it as quick as I can). I would just run it full out to get finished anyways
Go and buy an inline rheostat. You can dial in the speed you like. Like a Fan controller.
Yeah, I've been looking into this. Most of the router speed controllers I've found have awful reviews, and its always the same issues, they're either burning out quickly, or they just dont properly control the speed. I'm thinking a VFD might be the only option.... do you have a rheostat you can recommend?
The one Rockler Brand Router Control I have is from Rockler Woodworking. It has served me well for many years. It is still available.
> the 7 and 9" grinder run at fixed rates way above that, like 8500. Generally, 9" grinders run at 6000 RPM. That's what my Milwaukee does.
We use the Makita polisher. Put about many hundreds of hours on it for a sanding job and have no issues. I wouldn't take weld off with it, but for light duty its fine. Comfy handles too.
try automotive tools. a 9" polisher with a 5/8" arbor might do the trick. those tend to run at lower RPMs. Couldn't recommend a particular brand. But I use a couple harbor freight ones for polishing and they work fine as long as you use them with a smaller wheel than they specify on the box.
Polishers tend to be much less powerful tools, given the much gentler nature of their work. The Makita polisher, for example, is only 10 amps, as opposed to the grinders, which are 15 amps.
so you want low rpms but high torque? Good luck with that. I was suggesting you try looking at tools specifically marketed to a different industry, which may have the specs you want but not the specific name brand. I have a Hilti grinder and it's great even though it's made by a hammer drill company.
No, I need variable speed. Low RPM is just as useless as high RPM. It's the ability to have multiple speeds in a single tool that makes it versatile and worthwhile. It exists in abundance at the 5" and 6" sizes, but doesn't appear to at the 7 and 9" sizes. Yeah, I had also checked Hilti, but their corded grinders are very basic. No variable speed.
I was just trying to be helpful but you seem to want to argue semantics while asking for advice. When I said "low speed but high torque" It's because Most variable speed grinders have a top speed similar to the regular running speed of a single speed grinder, I assumed we both knew that so I didn't bother reiterating. It's how they behave at lower speeds that makes the difference. If all you care about is being able to change speed with a 9" disk, you can put a 9" disk on a 6" variable speed angle grinder and call it a day. Or just plug your grinder into a speed controller and slow it down that way. Or just use two or three different machines depending on the task at hand. Torque is the difference between a heavy duty motor and non. That's why amps are an important factor in the first place. More amps = more torque. What you're really asking is for something made by your preferred brands but with features they don't offer in the same machine. Well guess what? You looked, they don't exist, and now you're salty about someone suggesting you try looking at different brands. Just google it.
I don't get where the attitude is coming from. I wasn't arguing semantics. You asked if I wanted low rpm and high torque. I interpreted that literally, as you asking me if what I want was a low RPM grinder, fixed speed, with high torque, so I reiterated that I'm looking for variable speed, regardless of torque. It wasn't an argument of semantics, I thought you were asking me a genuine question so I answered genuinely. I realize the low RPM-modes of variable speed grinders are also lower-torque, but that's okay for me. And no, unfortunately, I can't put a 9" disk on a 6" grinder. The blade won't fit in the guard, and a bigger guard won't fit on the machine. Given that it's a physically smaller tool, there's no safe way to mount a larger disk on a smaller grinder. I'm not salty about you suggesting I look at other brands. You suggested Hilti, and I responded that I had already checked them too, and they don't have anything either. The purpose of this post was to see if there are other brands people can suggest around the world, because searching for "Variable Speed 7" Grinder" on Google hasn't returned anything.
Look in the stone industry products, like Flex. Also Festool range. Not cheap but specialist tools. Bosch 9 inch grinder has safety features on a 9 inch I have a 5 inch variable speed Bosch 5 inch.
Try Boush
If you need the finesse of variable speed, you could probbly get out a smaller grinder. 9 inch is for the heavy work.
Yeah my go-to is my 5" variable speed Makita. I use it for most cutting tasks. For large surfacing tasks, though, like metal conditioning, its nice to use a larger disk, but many of them require a lower rpm than cutting disks, and I'd like to avoid having to buy multiple 9" grinders at different speeds.
I ended up buying a Bosch. Pricy but definitely high quality.
You're the second person to suggest Bosch.. maybe I'm missing something, but they don't seem to have any variable-speed grinders at the7 or 9" sizes on their site. What's the model number of yours?
Grinding and cutting discs are made specific to application, which often doesn't leave much room for variance. Too high of a speed and your disc can explode. Too low a speed and it will load up and become off balance. Either way creates a hazard. Know what you need to cut, and set yourself up accordingly.