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I'm currently trying to find a nice 4 1/2inch angle grinder that is also capable of taking a wire wheel. I have decided to look into getting a Dewalt 4 1/2 inch 7 amp Angle Grinder. There is also a 10 amp available for not a whole lot more cash. Does anyone have any experience in using Dewalts in either amperage, also, would this be a recommended purchase?I'm just starting out in this wonderful field and I want to find something that will last a decent amount of time for the money that gets put into it.
Reply:i have both, a 7 amp and a 10 amp. the 10 amp has more power and will grind out metal faster than the 7 amp. i perfer to use the 10 amp grinder.
Reply:That's what I was figuring. Is there a noticeable weight difference between the 10 and 7 amp? We have some 7 inch grinders in our "Grinding Shop" at school and those things get a bit hefty after grinding down a plate or two.
Reply:If you think think that 7" is heavy grab a 9" and rassel it around for awhile. The only time I ever dinged myself was with a 9" 6000 rpm Rockwell and I was retired when I did it. Got old and weak I guess. To answer your question a little bit, I have the 10 amp DeWalt with the paddle switch. It's a stout little sucker. I like it better than any other 4 1/2" grinder I've used and I've used several brands over the years. The paddle switch was one of the reasons I chose it because I swore I would never buy another grinder with the push on-push off switch. I've had too much trouble with those.
Reply:I am trying to avoid a paddle switch. The 7"'s we have at the shop are trigger but the 4 1/2" are paddle switched. I'm a bit too wary on gripping it while gloved and such. The trigger just feels more... Visceral to me.
Reply:Originally Posted by SinisterDexterThat's what I was figuring. Is there a noticeable weight difference between the 10 and 7 amp? We have some 7 inch grinders in our "Grinding Shop" at school and those things get a bit hefty after grinding down a plate or two.
Reply:i have 2 of the older black and decker 4 1/2" grinders [basically same as dewalts] with the paddle switchs. i prefer the paddle switch. with that little dofloppy that you pull back first before squeezing the paddle makes it less likely to be accidentally actived when tool is sitting on bench. i hate when it comes skittering at you winging small tools and parts like a child having temper tantrum.dave.
Reply:X4 for the 10 amp Dewalt. If you ever have a slide switch grinder get a way from you (especially in a tight space) you will NOT like it. Has a tendency to go after anything within three feet of it, including YOU! Only stops when it beats around enough to dislodge the switch or it cuts through the cord, which causes another interesting problem!"The man of great wealth owes a peculiar obligation to the State, because he derives special advantages from the mere existence of government." Teddy RooseveltAmerican by birth, Union by choice! Boilermakers # 60America is a Union.
Reply:Originally Posted by Bob the WelderX4 for the 10 amp Dewalt. If you ever have a slide switch grinder get a way from you (especially in a tight space) you will NOT like it. Has a tendency to go after anything within three feet of it, including YOU! Only stops when it beats around enough to dislodge the switch or it cuts through the cord, which causes another interesting problem!
Reply:Originally Posted by Bob the WelderX4 for the 10 amp Dewalt. If you ever have a slide switch grinder get a way from you (especially in a tight space) you will NOT like it. Has a tendency to go after anything within three feet of it, including YOU! Only stops when it beats around enough to dislodge the switch or it cuts through the cord, which causes another interesting problem!
Reply:About cup brushes....................The original questionA 3 or 4" cup brush puts a huge amount of strain on a grinder because of a balance issue, and inertia. Cup brushes are fairly heavy, if you get a good one.A cup brush, due to it's inherant inbalance, puts out a lot of high frequency vibration which transmits to the grinder's gear train. It's murder on gears and bearings.I have a 4 1/2 and 6" DeWalt, and love them for heavy duty grinding, but I would never put a cup brush on either grinder. I sometimes have the cup brush going for an entire day.Instead I buy throwaway grinders for paint prep and other non critical uses. A cheap HF grinder for 19 bucks is adequate, and you don't mind when gears and bearings get trashed. Also wire brushing is a messy business, and lot's of stuff gets sucked into the grinder. You really don't want that crap in a good grinder.Go cheap on the grinder, but spend good bucks on a cup brush, or wire wheel.That's my take on it anyway"Any day above ground is a good day"http://www.farmersamm.com/
Reply:I have a little 4" makita that's at least 15 yrs old and most of its life has been running a 3" cup brush. I finally had to buy new brushes for it last spring and it's still goin' strong. The biggest job it's ever done was removing 7,that's right, 7 coats of paint off a 6' x 24' wood porch deck. I figured I was gonna cook the little guy, but the built in overload taught me how far I could push things.Since then it's removed a lot of rust from iron. So if cup brushes cause a lot of stress, I guess this one is tough enough to take it.However I do open up the gearbox on both grinders and clean and grease them once a year. My other grinder is an old B&D 4 1/2" I rescued from the dump simply because the sheath had rotted away on the cord. It always does all the grinding and has held up well. I have a Dewalt 4 1/2" I picked up a yard sale for $10 and had to order a new ring gear for it because a couple of teeth were knocked off. It's waiting in the cabinet to replace one of the old timers when they die. I don't even own a 7" or 9", got enough of them in my working years. Want to let my arms get a little rest in retirement!!!! MikeLast edited by mla2ofus; 01-18-2010 at 11:53 PM.Ol' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:I like the dewalt 02110 I think that's it. Big enough to do the job, small enough to one hand it if you need to and cheap enough that it won't make you cry if you have to replace it. I like the slide switch too. I don't mind triggers, but I hate paddles.My name's not Jim....
Reply:Originally Posted by mla2ofusI have a little 4" makita that's at least 15 yrs old and most of its life has been running a 3" cup brush. I finally had to buy new brushes for it last spring and it's still goin' strong. The biggest job it's ever done was removing 7,that's right, 7 coats of paint off a 6' x 24' wood porch deck. I figured I was gonna cook the little guy, but the built in overload taught me how far I could push things.Since then it's removed a lot of rust from iron. So if cup brushes cause a lot of stress, I guess this one is tough enough to take it.However I do open up the gearbox on both grinders and clean and grease them once a year. My other grinder is an old B&D 4 1/2" I rescued from the dump simply because the sheath had rotted away on the cord. It always does all the grinding and has held up well. I have a Dewalt 4 1/2" I picked up a yard sale for $10 and had to order a new ring gear for it because a couple of teeth were knocked off. It's waiting in the cabinet to replace one of the old timers when they die. I don't even own a 7" or 9", got enough of them in my working years. Want to let my arms get a little rest in retirement!!!! Mike
Reply:I've got 2 DeWalts: 10 amp w/paddle, and 7 amp with slide switch. They both have advantages... depends on the task. If I had to choose one though, the 10 amp has more balls for heavy grinding. You'd likely be happy with either.Work HARDER, not smarter! ------------------------ Miller Bobcat 250Millermatic 251Lincoln Precision TIG 185Hypertherm PM 600Hobart 135 HandlerOxweld 400 FlameMaster
Reply:Originally Posted by Leadhead1911I've got 2 DeWalts: 10 amp w/paddle, and 7 amp with slide switch. They both have advantages... depends on the task. If I had to choose one though, the 10 amp has more balls for heavy grinding. You'd likely be happy with either.
Reply:I'm real happy with the 4 1/2" or 5" Milwaukee that I have. 13 amp, paddle switch, has tons of power, a little heavier than lower amp ones. Downside is that it was over $100..... I think $120 with shipping. I use a 9" Milwaukee for heavier work.... downside on it is how heavy it is.HH 187Miller Bluestar1EAHP AlphaTig 200X
Reply:To go one step farther into this subject... Harbour Freight for grinding discs and wire wheels, or just go and get actual brand name discs/wires?
Reply:when it comes right down to it " you get what you pay for". whether its american, german, Taiwan, or china; grinders,wire wheels, welding equipment or cars,what ever your conscience can bear.dave.
Reply:Originally Posted by farmersammI might be thinking wrong then.I get about 40hrs out of the cheapie. I figure it's around 50 cents an hour. I'm not sure how that stacks up against a better quality tool.
Reply:ive got 3 grinders 2 black and decker and 1 i got from macs 15 yrs agomiller maxstar 150 hobart handler 210 w mig conversion hobart 250 arc force plasma cutter boston ind cutting torch miller performance auto darkening helmet milwalkee 14in chop saw 10,000 watt generator huge drill press and industrial band saw
Reply:Originally Posted by mla2ofusSamm, I wasn't trying to step on your toes. I just was amazed the little cheap makita could do so much for so long when I paid $49.95 for it new I'm guessing 14 or 15 yrs ago. Mike
Reply:No snide remark sensed there, Samm.You're just like the rest of us old farts, If you got somethin' in your craw you get rid of it right away and if the party that put it there better not be in the way. I just got to thinking what I said could be taken wrong and I didn't want to leave you feeling that way. MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Mike and Samm, quit being so sensitive! YUR KILLIN" ME I don't know if you can even get a good grinder anymore, but the current " made in the usa" milwaukee I have has WAY more than 40 hrs on it and has spent plenty of time with a variety of wire wheels...I do lube the gearbox once in a while.I'd also cast a vote for Bosch.
Reply:Originally Posted by SinisterDexterTo go one step farther into this subject... Harbour Freight for grinding discs and wire wheels, or just go and get actual brand name discs/wires?That's what I figured re: HF Wheels and Wires. The price difference between Home Depot and Lowes and HF isn't that great.
Reply:Originally Posted by SinisterDexterI'm currently trying to find a nice 4 1/2inch angle grinder that is also capable of taking a wire wheel. I have decided to look into getting a Dewalt 4 1/2 inch 7 amp Angle Grinder. There is also a 10 amp available for not a whole lot more cash. Does anyone have any experience in using Dewalts in either amperage, also, would this be a recommended purchase?I'm just starting out in this wonderful field and I want to find something that will last a decent amount of time for the money that gets put into it.
Reply:I completely agree with mal2ofus.I too have a 4" Makita, at least 15 years old and I also had to replace the brushes - that's just an indication of how much use its gotten over the years. I use wire cup brushes about a third of the time, cut-off wheels 1/3 of the time and grinding wheels 1/3 of the time. I use both the 'thin wire' wire wheel as well as the heavier knotted wire cup wheels and have probably worn out a dozen or so of each. Never had a problem using any of them and I still use the machine 3 ro 4 times a week at least.There may be better grinders but none for the price of a Makita - best value for the money.
Reply:@RhynoI am actually looking for one with a handle much like that. We have two types of grinders in the school shop, a few 4 1/2 inch Dewalts with paddle switches and 2 7 inch Dewalts with the trigger switches with the elongated handles. After grinding down structural test plates, the trigger grip is a god send compared to the fat handle of the 4 1/2's.Now I just need to convince my Head Teacher/Welding Inspector to allow me to use the cut off wheel to cut my test coupons instead of an oxy torch. I had to highlight in the AWS D1.1 guidelines where it said that I could use a grinder and a wire wheel to clean the welds just to keep him from failing my plates for "Tampering".
Reply:Originally Posted by SinisterDexter@RhynoI am actually looking for one with a handle much like that. We have two types of grinders in the school shop, a few 4 1/2 inch Dewalts with paddle switches and 2 7 inch Dewalts with the trigger switches with the elongated handles. After grinding down structural test plates, the trigger grip is a god send compared to the fat handle of the 4 1/2's.Now I just need to convince my Head Teacher/Welding Inspector to allow me to use the cut off wheel to cut my test coupons instead of an oxy torch. I had to highlight in the AWS D1.1 guidelines where it said that I could use a grinder and a wire wheel to clean the welds just to keep him from failing my plates for "Tampering".
Reply:I've got 3 of the older (10 yrs) DeWalts with the paddle switches. The newer ones are not made as well I believe however. I'm thinking about a Metabo when one of the DeWalts finally dies. I'm looking at the various trigger options also. I'm NOT a big fan of slide switches.One note, mark the pi$$ out of your tool, especially if you go with something thats similar to what the school's got. It's amazing how fast something will sprout legs and wander off as soon as your backs turned. I've lost tools on jobs in the time it takes me to climb down one level to get to where the guy below helping me was working with it. It couldn't have been out of my sight for more than 1-2 minutes it took me to walk over to where I could climb down. I've had guys try and walk off with the extension cord while I was using it. All my small tools are painted light blue, the expensive ones, engraved with initials in 2 hard to find places as well as painted. The paint makes it easy to spot, the engraving makes it easy to identify after you locate it. Guy I used to work with ordered all custom colored extension cords with his company name on them. 50's were purple, 100's were pink. Made for easy identification in the truck, as well as on the site..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:@RhynoThe Welding Inspector/Head Teacher spun it to me like this... "We don't want you to use grinders and wire wheels because you should be able to lay down a bead and not need them. That's what we are here to teach you." I fired back with "Right, except that any welder worth their salt grinds their welds to make them look more professional." I then went on to show him the AWS Standard and it shut him up REAL quick.@DSWThe school I go to is in Paterson NJ. If you aren't familiar with that area, it's basically one of the inner city areas in NJ. I've had simple things like chipping hammers stolen from my welding booth. That grinder is staying in my car between classes and in my hands unless I'm using it. They claim that there are cameras in the shop, but I sort of doubt that. Glad to see my tuition is going far though.
Reply:Originally Posted by Rhyno.......It also sounds like you have not learned about inspectors. They can bust you for every lame-A$$ excuse ever imagined. One of the biggest reasons is if you point out how he doing his job wrong. Your weld will be good, and he'll bust you just to teach you a lesson. Welcome to "the error of man."
Reply:I think one of the big things that I am concerned about is what happens if/when I need to get re-certified for SMAW 3/4G or I need to take a different certification for a job. I'd rather be prepared knowing the right way to grind down and properly clean a weld. But now I'm getting FAR off topic and my rants and raves about my school can wait for another day.
Reply:Hi, For my work I much prefer the 5" grinders with elongated handles instead of the 4" or 4.5" as I get usually get a more powerfull machine which lasts longer and better value out of the disks and also the elongated handles give me a better grip on the machine in case it kicks back. I also have 2 x 9" grinders for heavy grinding.The 5" isn't too heavy, with a good grip and I use it for most of my jobs except when I have to do a lot of heavy grinding as the 9" removes metal about 3 times faster but much harder on the arms and back. Also the 9" are not suitable for me above chest high work, to risky/dangerous and I get fatigued too easily using them which could lead to a nasty accident so the 5" comes into use. For lots of heavy grinding in the horizontal or incline work at ground level the 9" is used. I just let the weight of the grinder do the work and it grinds very quickly saving me time (and money) and not to hard on my back and arms. Above chest high use forget the 9"!!The 5" is a (AU$70) 1200Watt soft start GMC (Global Machinery Corp), the company unfortunately went bust 12 months ago and it is a variable speed grinder, (very handy feature). 1 x 9" is also a GMC 2300Watt, (on it's last legs) bushes almost worn out and I have just replaced it with a 9" soft start Rockwell 2350 Watt unit (AU$80).I can use a 4" wire cup on all of them and the 5" handles it well with out overloading it as it has 1500 watts of power (Watts=Volts x Amps) so 1500W=240V x Amps it is 6.25Amps at 240 Volts, but at 110 Volts as in the USA it would be the equivalent of 13.64 amps. The good thing about this 5" is that it has the same thread and hole size as the 9" so when the 9" grinding disk wears down to 5" size rather than throw it away I just put it on the 5" and keep going if I need to and haven't got any of the 5" grinding disks left, and the wire cup fits on it as well as on the 9".I am actually thinking about buying another 5", so that I don't have to keep swapping from a grinding to a cutting disk, and I will be again be looking for one with the biggest available wattage and a variable speed control on it. Black and Decker and Ryobi also had a similar model out as the GMC when I bought the last one.But if you want to get a Dewalt then I would suggest getting the higher amperage version. The Dewalts/Makitas/Bosch/Hitatchi's have a good reputation here in Australia but about double the price, hence the reason I go for the cheaper brands, which usually come with a two year warranty anyway.Hope this helps.Miller Auto Invision 456 + S-62 wire feederC6240B1 Gap bed lathe16 ft3 air compressor16 speed pedestal drillHafco BS-912 Bandsaw
Reply:I made them stop buying the high amp angle griders at work. The Milwaukees in the 10+ am range burn through brushes at an incredible rate. Once the brushes burn up they start arcing and melt the armature down. The Dewalts have a spring loaded pin that pushes the brushes off the armature before they wear out which saves the grinder. Milwaukee recently started making their grinders in China. The new 7 amp models strip out gears but so did the 12 amp models. The Dewalts tend to strip out the gears, too. We've decided that you can't get a good grinder anymore and have settled on just running the $59 Dewalts because they're cheap to replace and do hold up as well as the more expensive models.
Reply:Originally Posted by farmersammAbout cup brushes....................The original questionA 3 or 4" cup brush puts a huge amount of strain on a grinder because of a balance issue, and inertia. Cup brushes are fairly heavy, if you get a good one.A cup brush, due to it's inherant inbalance, puts out a lot of high frequency vibration which transmits to the grinder's gear train. It's murder on gears and bearings.I have a 4 1/2 and 6" DeWalt, and love them for heavy duty grinding, but I would never put a cup brush on either grinder. I sometimes have the cup brush going for an entire day.Instead I buy throwaway grinders for paint prep and other non critical uses. A cheap HF grinder for 19 bucks is adequate, and you don't mind when gears and bearings get trashed. Also wire brushing is a messy business, and lot's of stuff gets sucked into the grinder. You really don't want that crap in a good grinder.Go cheap on the grinder, but spend good bucks on a cup brush, or wire wheel.That's my take on it anyway
Reply:i have milwaukee a 4.5" 12amp rpm 4000-11000and a 9" 15amp rpm 6000 one made in usa andother in germany i like you can take the cordsoff and they work great Attached Images
Reply:All your advice has been invaluable. I am thinking of getting the Porter Cable and use it as a good throwaway for home projects, but as it stands right now I am wary on getting a grinder for school as I have passed my 3G and 4G SMAW plates and am about to matriculate into TIG in 3 weeks, and any grinding I need to do for my TIG pieces can be accommodated by the Big *** Bench Grinder and Big *** Wire Wheel that we have in the shop.
Reply:i think im a little late here, but most of our grinders at work are dewalt 5" 12amp ones. they are awesome. i used my little 4 1/2" 5amp grinder i have the other day and it sucks. i have used a few 7 and 9" grinders but i find the 5" are nice for feild work where your grinding and cutting overhead and in tight spots.just my 2 cents
Reply:Originally Posted by SinisterDexterAll your advice has been invaluable. I am thinking of getting the Porter Cable and use it as a good throwaway for home projects, but as it stands right now I am wary on getting a grinder for school as I have passed my 3G and 4G SMAW plates and am about to matriculate into TIG in 3 weeks, and any grinding I need to do for my TIG pieces can be accommodated by the Big *** Bench Grinder and Big *** Wire Wheel that we have in the shop.
Reply:Originally Posted by JohnnyWelderGood choice. When your ready for a tig, pick up an Invertec V310.
Reply:LOL
Reply:My vote goes to the Metabo WEP 14-150 Quick. Its more money, and its actually a 6" grinder, but its physically the same size and weight of a normal 4.5 inch. I use a lot of cutting wheels, and a 6" disk in one of these is awesome, and since a 6" disk is the same price of a 4.5" Its cheaper to use.http://www.metabo.com/Product-catalo...2295e3d.0.htmlMiller 250x & Lincoln V205-TSmith Oxy-Prop torch |
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发表于 2021-8-31 22:41:27