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  • Best grinders for stainless

    It's been quite a while since I had a project worth posting on here. This is my first stainless steel project. I'm building a couple of 1/4" 304 stainless steel craftsman style columns with built-in lighting for my new entryway on my house. The project is coming along, but as you may guess, it has begun to eat my lunch.

    First, just the 25 lb spool of 308 wire was $250. That was a kick in the pants. Then, there was a lot, lot, lot of welding. I should've gotten my parts cut slightly differently so I wouldn't have had to build so much weld up to be able to sharp angle. Lesson learned. It's looking good now. Name:  1c5d7955d8383c4bca5913ef35c8d77c.jpg
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    This is the main problem I have now. Name:  82a145383c5df94e0708fcbb7ed3f4c2.jpg
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Size:  65.2 KB My grinders are trashed. I had two 4 year old Dewalt D28110 4-1/2" grinders that burned up. The cost to fix them makes it necessary to just get new ones. I also had a 2 year old Dewalt D28402 4-1/2" grinder that stripped out it's gears and brushes. That one is salvageable with a gear from the burned up one and new brushes.

    I know I need a 7" grinder and new 4-1/2" grinders. What do you pros recommend for the extra stress required for stainless? Have you noticed better quality from Dewalt, Makita, Milwaukee, Hilti, etc? Better handling/life expectancy from a higher amperage/lower amperage? I'm not too concerned about the cost as I expect to spend $130-250/grinder because I'm not buying HF garbage.

    Another question: I have some interior fillet welds to smooth out. A couple of grinding stones used with my die grinder have just come apart on this stainless. Do burs hold up well on stainless or do I just need to plan on buying a ton of stones? (I realize I could just become a better welder, but that may not happen.)
    MillerMatic 252
    Spoolmate 200
    Diversion 165
    Spectrum 625 X-Treme
    Dayton 6" Miter Band Saw
    Delta Drill Press
    Bosch 10" Table Saw
    Bosch 12" Double Bevel Miter Saw
    Jet 5 Ton Chain Hoist
    Radnor O/A

    and this heavy duty table I made

    sigpic

  • #2
    I have two 4.5" milwaukee grinders that i use and havne't had any issues with them. They have been used mostly on steel but have also done a lot of work on concrete and tile.

    But i think most of the grinders you get from dewalt, milwaukee, makita, bosch will be just fine. Just try to get the higher amp models. Stay away from the 6 amp models.

    Comment


    • #3
      The two that burned up were 6 or 7 amp models. The one with the torn up gear was a 10 or 11 amp. They've gotten a lot of use, and it's not like they tore up right out of the box. I've been fairly pleased with Dewalt products so far. I'm leaning towards trying out Makita though.

      I'm just curious what people use that need everyday service instead of every month service from their grinders.
      MillerMatic 252
      Spoolmate 200
      Diversion 165
      Spectrum 625 X-Treme
      Dayton 6" Miter Band Saw
      Delta Drill Press
      Bosch 10" Table Saw
      Bosch 12" Double Bevel Miter Saw
      Jet 5 Ton Chain Hoist
      Radnor O/A

      and this heavy duty table I made

      sigpic

      Comment


      • #4
        Best grinders for stainless

        I'm not a pro but have used many angle grinders daily over the years with varying success depending on price point.

        You may want to look at

        https://www.ridgid.com/ca/en/twist-handle-seven-inch-angle-grinder

        Bought this tool a year ago and couldn't be more pleased.

        They also make a 4.5" model

        No affiliation or interests in this brand only like their Lifetime Warranty (as long as you register as per instructions)

        Ps. I burned up a $24 4.5" angle grinder last week working on aluminum. Noticed a few chunks flying out of the fan housing, started to smoke so I put it down still running and watched it auto destruct!

        Comment


        • #5
          Best grinders for stainless

          Metabo hands down best grinders I have ever used.

          Comment


          • #6
            Best grinders for stainless

            Yeah Metabo is the bomb but that's what's gonna hit your wallet too.lol. Milwaukee,Bosch and Ridgid are your best bang for your buck but if you want top shelf go with Meta. I have a Milwaukee and I use it everyday for something. Never a problem on the 4" or 7". Just my $.2!
            On the contrary my buddy has the Harbor Freight(drill master I think) and it had been a trooper for him.

            Comment


            • #7
              Originally posted by Precision View Post
              Yeah Metabo is the bomb but that's what's gonna hit your wallet too.lol. Milwaukee,Bosch and Ridgid are your best bang for your buck but if you want top shelf go with Meta. I have a Milwaukee and I use it everyday for something. Never a problem on the 4" or 7". Just my $.2!
              On the contrary my buddy has the Harbor Freight(drill master I think) and it had been a trooper for him.
              I also have no problem with Harbor Freight grinders. NoogaD mentioned spending over a $100. for a grinder. I catch them on sale at Harbor Freight and buy three or four for less than that. I don't like taking the time to change the different wheels every time I change what I am doing. So I keep an assortment of them hanging off the end of my bench with different wheels, (grinding, flap, wire brush, cutting wheel), then just grab what I need at the time.

              If one of them dies on me, then I haven't lost enough money to worry about.

              Comment


              • #8
                My problem isn't exactly the money. I mean I don't WANT to spend the money to replace two grinders and fix a third. But I work away from home, so when I'm home I get in the garage. My days off vary between a day or two or a week. What happens is that stuff like this happens and really kills my time.

                I was starting this project, and my argon tank was getting low. I tried to finish out the tank, but I knew I was risking getting the empty to the LWS at closing time on a Friday. Sure enough, I got there five minutes after they closed and couldn't find anyone open on Saturday that had any in stock. That Sunday, I had to go back out of town.

                The grinders quit right around the time Lowe's closes, and then I had to go to work the next day. Each time it's been about two weeks before I get back home to work on my personal projects.

                I've got plenty of stuff from HF (of varying quality) so I'm not knocking it. I just don't trust that something like a grinder is going to hold up on stainless projects. That stuff is tough, and I don't want to keep a stable of cheap grinders on the shelves. My Dewalts worked flawlessly until this project, but they burned up fairly quickly once I got started fairly well.

                The Metabos look pretty darn tempting, and the price isn't terrible. And from another post, I think I'm going to contact the local Flexovit rep to get some better abrasives.
                MillerMatic 252
                Spoolmate 200
                Diversion 165
                Spectrum 625 X-Treme
                Dayton 6" Miter Band Saw
                Delta Drill Press
                Bosch 10" Table Saw
                Bosch 12" Double Bevel Miter Saw
                Jet 5 Ton Chain Hoist
                Radnor O/A

                and this heavy duty table I made

                sigpic

                Comment


                • #9
                  Metabo and Fein are by far the two best out there. Sure, you are going to pay more for them but there is no better quality. They are both products of Germany. I have both of them and they are virtually bulletproof. Other than normal maintenance like blowing then out occasionally,which most people don't do, and replacing brushes, they will outlast any grinder on the market.

                  Just a word of advice, however much that is worth??, if you are doing a lot of grinding on stainless or aluminum do not use those 6 or 7 amp grinders. Go with a minumun of 10 amp. Also, when you use the 4 1/2" grinders, make sure you are not covering the air (cooling) slots with your hand while holding it. That has to be the number one mistake people make. And then they wonder why their grinders are burning up.
                  JIM

                  Owner Operator of JNT Mobile Welding & Repair LLC
                  Millermatic 350P Aluma Pro
                  Dynasty 200DX
                  Maxstar 150 STL
                  Trailblazer 302
                  Suitecase 12RC
                  Extreme 12VS
                  Extreme 8VS
                  Spoolmatic 30A
                  Miller HF251D-1
                  Passport Plus
                  Spoolmate 100
                  Hypertherm Powermax 45 and 85
                  Ingersoll Rand Engine Driven Compressor
                  Dake 75 ton H-Frame Press
                  JD Squared Model 32 Bender
                  Miller Digital Elite

                  Comment


                  • #10
                    Best grinders for stainless

                    Not to hijack but a question if the OP would permit?

                    What makes stainless so much harder on grinders than mild steel?

                    I realize it is hard but would think that aluminum would be more of a challenge because of the increased drag on the abrasives!

                    I have welded stainless a few times and attempted to drill it but never really worked with it.

                    Comment


                    • #11
                      ihave 4 dewalt grinders and one that I just can't think of the name right now it's blue . but anyway I haven't bought a grinder in years due to the fact that parts are so cheap on the internet that I just rebuild them. I pickup old grinders on the jobs that the companies are throwing out because the brushed or motors bearings done went out so I take them home disassemble them and order the parts I need and fix them.i have yet to come across a grinder that's broken and would cost more to fix than repair unless the grinder was run over with a crane or truck it can be fixed the motors hardly ever go out it's mostly the brushes and bearings the motors on them are very durable and can take a beating.as for as the stainless work you could have used regular steel and buffed it down when finished then come over it with a clearcoat that would keep the polished steel look for a fraction of the price for stainless steel.

                      Comment


                      • #12
                        I have never ruined a B&D 7750 from Walmart, also can be had at Menards on sale for 20$. They are way better than the HF and outlasted several yellow ones and the only time I pick up something else is a Milwaukee that has a rotating guard. We have tested these extensively, feel how heavy one is sometime.

                        Comment


                        • #13
                          Originally posted by ericher69 View Post
                          I'm not a pro but have used many angle grinders daily over the years with varying success depending on price point.

                          You may want to look at

                          https://www.ridgid.com/ca/en/twist-h...-angle-grinder

                          Bought this tool a year ago and couldn't be more pleased.

                          They also make a 4.5" model

                          No affiliation or interests in this brand only like their Lifetime Warranty (as long as you register as per instructions)

                          Ps. I burned up a $24 4.5" angle grinder last week working on aluminum. Noticed a few chunks flying out of the fan housing, started to smoke so I put it down still running and watched it auto destruct!
                          I could not agree more!!!! How can you argue with a lifetime warranty? ....and yes I have two 4.5" Ridgid grinders and like them.
                          Nick

                          Comment


                          • #14
                            I have two DeWalt 4 1/2" and a DeWalt 5". My 7" is a 1978 vintage Milwaukee. I used to sell tools, and I sold a few Makita 7". They were impressive tools.

                            Comment


                            • #15
                              Best grinders for stainless

                              I teach welding so u can imagine what kids do to grinders. Have not had a metabo burn up in 3 years knock in wood. Expensive but u get what u pay for. Just my 2 cents

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