Comments by "Paul Frederick" (@1pcfred) on "Best Angle Grinder (Corded)? Hilti vs Milwaukee, DeWalt, Makita, Ryobi, Ridgid. Let's Settle This!" video.

If you only have one power tool an angle grinder is a good one to have. It'll cut, grind or sand just about anything.
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@juantamez9442 the house brand hand tools have a lifetime guarantee. Power tools are a separate matter. I don't know about Harbor Freight's premium brands. The Hercules and Bauer lines. That's all so expensive I'd rather just get name brand. Plus I've had such poor luck with their older house brand power tools it's made me leary.
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Well yeah. Makita motors are legendary. The armatures Makita scrap are better than what everyone else can make. They have a crazy balancing spec. They don't allow for too much material removal to balance the armature. A lot of companies build motors with scrap Makita armatures.
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The only way more amps could possibly lead to cooler temps would be if the increased power kept the tool from bogging down which would keep the cooling fan spinning. Otherwise more amps means more power to dissipate. Fans in tools are designed to spin at specific speeds. There's just not a lot of latitude in the product to allow for variability. Beyond that we do not know how manufacturers rate their products. There's no governing body that dictates methods. Is the rating no load or loaded? So those ratings are meaningless.
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@artsmith103 when you exceed the power of a tool then the tool will lose RPM. We saw it happen in this video and saw the tool burn up as a result. But there's another factor at play there. That would be the gauge of the magnet wire. That's why the current is so low to begin with. The winding wire is thin. That causes greater electrical resistance to current flow. Thin wire also burns up easier. Though one motor seemed to suffer a brush failure. That's often due to how the brushes are held. They can't handle the heat. The brushes are in thin metal holders held by the plastic body of the tool. That melts and causes issues.
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@MatthRrrr Ryobi and Milwaukee are both made by TTI. TTI also makes Hart and Rigid tools too. Although oddly TTI won't cop to making Rigid on their website. Not sure what's going on there.
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Harbor Freight power tools have a limited warranty. I think 90 days? They will try to upsell you an extended warranty when you check out though. I think they offer 2 years? It isn't lifetime that's for sure.
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Harbor Freight power tools are junk. With rare exceptions. I can think of three I've had which I thought were OK. I've had a lot more than 3 of them. More like dozens. Well, 4 now that I'm thinking about it. Their multitool I have of theirs isn't bad. Definitely not a pro tool though. The blade change on it sucks.
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7/9s are a whole other kettle of fish compared to 4.5" grinders. There's none of that back and forth nonsense going on grinding weld beads down with a 7/9. You just rip the bead off in one pass.
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When I use a 4.5" angle grinder it is for convenience. The smaller size is easier to use. When I need power I use a 7/9" grinder. So then features become more important in the 4.5" form factor. I like 3 handle positions and a paddle switch. I hate those side switch grinders.
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Wire wheel is the most demanding application. Well, if you want to get done in a reasonable amount of time, at any rate.
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@artsmith103 overall size does not solely determine power. You can make an 8 amp motor the same size as a 4 amp one. You just have to make it differently. You pack heavier windings into the same space. A winding with larger wire gauge and less length will draw a lot more current.
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@artsmith103 everything is similar but nothing is exactly the same. The Devil always lies in the small details not the gross simplifications.
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It is trivial to speed control any universal motor. You can use a phase fired chopper. Which is a fancy way of saying light dimmer. But you need an inductive rated one. You need a snubber across the triac. Or you can just use snubberless triacs. They cost about 50 cents on the open market.
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Yeah Porter Cable is a zombie company today. It is just a brand name now. Black & Decker owns the trademark. They don't care about PC either.
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@dogishappy0 if you take your time even the cheapest angle grinder should be able to cut rebar. Heck a hacksaw can cut rebar. I've cut rebar with a jackhammer but I wouldn't recommend that. But if it's all you got it does work. My preferred method of cutting rebar is with a gas ax. You can cut through a whole bundle of rebar with one of those.
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If you're killing grinders so regularly it is time to step up to a more capable tool. Get a 7/9" grinder and see what dies first, you or the tool. My money is on the tool outlasting you.
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@noonespecial9840 I guess they just don't make 7/9s like they used to. You can lean on the ones I have and they won't quit. They'll glow a bead up. If you're strong you could one hand one. I never have a room issue whenever I grind.
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I don't use tools to change attachments on angle grinders unless I've managed to burn a disc down to nothing. If there's still diameter there it's plenty to twist off with. But I will put a glove on a wire wheel. Those wires can stick right in me.
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Different factors are more important for different people. For me with an angle grinder I want a 3 position handle and a paddle switch. If I need raw power I'm going to use a 7/9" grinder. Those are all rat tails. You ain't barrel gripping one of those.
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