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New to me Belt Grinder :I Hope

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  • #16
    Very nice. If I were you, I'd do whatever it takes to maintain variable speed, or at least two speed. That's extremely useful for a belt grinder.
    Southwest Utah

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    • #17
      Originally posted by Tundra Twin Track View Post
      Yes the one one wheel has abrasive side on it,talked to Nexus Belt Grinder Guy and he has one configuration that does that with no issues.Machine is 1983 and all coating on Wheels has separated from Aluminum Wheel,will be dropping wheels off tomorrow to be recoated.The durometer will be a guessing game possible 70,I’m open to ideas on that.
      60-70 sounds like a good target to me, that's something close to tire rubber. I've used this chart before with good sucess in selecting the best material-
      https://viprubber.com/materials/material-properties/

      I've been thinking about building a couple more 1" belt grinders and trying an Aluminum wheel with a series of half depth O-ring grooves turned in the OD. I figure I could even vary the minor diameters to simulate a crown if needed.

      I just need one more tool,just one!

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      • #18
        When I look these up I see them being called belt sanders, while I keep seeing belt grinder referenced in this thread.

        If this is indeed a sander are you planning on doing something to up the SFM to get into grinder territory?

        I am not real familiar with belt grinders but I just recently started to think about building a 2x72 and started looking at them some.

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        • #19
          Oxford I mentioned in my first post these are Sanders ,that I hope to convert for Metal Grinding.One pulley combination would be 2750rpm at the 5” drive wheel,maybe that’s to fast.

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          • #20
            Originally posted by Tundra Twin Track View Post
            Oxford I mentioned in my first post these are Sanders ,that I hope to convert for Metal Grinding.One pulley combination would be 2750rpm at the 5” drive wheel,maybe that’s to fast.
            Gotcha. Is the abrasive belt direct drive off the motor or is the motor driving other pulleys.

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            • #21
              Mine turns 3,600 RPM on a 5” drive and I would be happy it it went faster. What ever you do make sure it is variable speed using a VFD.
              don’t skimp on belts 3M crubitron belts WILL make you smile every time you use it.

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              • #22
                Originally posted by oxford View Post

                Gotcha. Is the abrasive belt direct drive off the motor or is the motor driving other pulleys.
                It’s belt driven,so there’s some wiggle room.
                Originally posted by true temper View Post
                Mine turns 3,600 RPM on a 5” drive and I would be happy it it went faster. What ever you do make sure it is variable speed using a VFD.
                don’t skimp on belts 3M crubitron belts WILL make you smile every time you use it.
                If theirs some sort of work around the 440 volt will have variable speed,if go 1 ph motor will be fixed speed.I’ve heard great things about Cubetron ,VSM Abrasives just released a new belt this past April called Actirox, it suppose to be a step up from there Ceramic Plus that’s Cubetron equivalent.The Actirox only available in 36 grit,more selection is on the way.

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                • #23
                  Originally posted by Tundra Twin Track View Post


                  If theirs some sort of work around the 440 volt.
                  What’s your shop voltage? I saw single phase and you had mentioned a transformer so I am guessing 240v?

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                  • #24
                    Originally posted by oxford View Post

                    What’s your shop voltage? I saw single phase and you had mentioned a transformer so I am guessing 240v?
                    Yes 240volt 1ph in my shop,I would be interested in knowing exactly what I need to make this 440 volt motor work with a VFD.I’m guessing a transformer of some sort which was hoping to avoid but Variable Speed would be nice.

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                    • #25
                      Originally posted by true temper View Post
                      Mine turns 3,600 RPM on a 5” drive and I would be happy it it went faster. What ever you do make sure it is variable speed using a VFD.
                      don’t skimp on belts 3M crubitron belts WILL make you smile every time you use it.
                      T T can’t you over speed the motor with your VFD,some of the Guys selling Belt Grinders won’t warranty the New Bearing in those small rollers when used at high speed.This is a little different Animal as the rollers on top of Platen are less than 7/8” in dia,maybe the high speed program might be a bearing killer so to speak for this machine.

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                      • #26
                        440 V at 60Hz is not an European used voltage so that machine must have been made for the US market. Maximum speed for an induction motor in Europe is 2980 RPM
                        Helder Ferreira
                        Setubal, Portugal

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                        • #27
                          That's a neat tool. I wonder for general purpose use, does the tight radius at the top accelerate belt wear, especially at the splice?

                          I've seen a version similar to this at auctions in the US, mostly in die shops. It is smaller and lighter duty, but intended to be more precise, with indicators to set angles, etc. I can't recall the name.

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                          • #28
                            Originally posted by Noitoen View Post
                            440 V at 60Hz is not an European used voltage so that machine must have been made for the US market. Maximum speed for an induction motor in Europe is 2980 RPM
                            Good observation Noitoen,that makes perfect sense.Like the Wadkin table on my Gang Drill,every bolt on entire machine is BSW but all holes on table are 1/2” NC where jigs would be attached to,just for North American Market.
                            Originally posted by Glug View Post
                            That's a neat tool. I wonder for general purpose use, does the tight radius at the top accelerate belt wear, especially at the splice?

                            I've seen a version similar to this at auctions in the US, mostly in die shops. It is smaller and lighter duty, but intended to be more precise, with indicators to set angles, etc. I can't recall the name.
                            I’m sure the small rollers don’t improve belt life for sure,the New Material for Belts these days would be better than the ones when these machines first came on the market in the late 60’s.

                            Any chance the machine you seen was a Philipson,it’s the only other one I’m aware of that is similar design,made in England and very pricey.This is not a Beast of a Machine like my Max 24” Disc Grinder,but will have capabilities that are totally different.Time will tell🙂

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                            • #29
                              Originally posted by Tundra Twin Track View Post

                              T T can’t you over speed the motor with your VFD,some of the Guys selling Belt Grinders won’t warranty the New Bearing in those small rollers when used at high speed.This is a little different Animal as the rollers on top of Platen are less than 7/8” in dia,maybe the high speed program might be a bearing killer so to speak for this machine.
                              I’m not smart enough to program the VFD to run faster, I got it to run at 60 hertz figured that was good enough.
                              I didn’t know any better and used double or triple sealed ag bearings on my adjuster idler. It ran hot for many years but it’s getting better now.

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                              • #30
                                Will be running a 1ph Motor for the time being,it’s a US built Marathon 1-1/2hp that I found at the Dump,runs glass smooth.A few more kinks to figure out for pulley mount then waiting game for Wheels to be recoated and order some Abrasive Belts.Drilled some holes in Cast Body,was surprised it was 5/8” thick🙂 Click image for larger version

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