New to me Belt Grinder :I Hope

[Noitoen]

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

[Tundra Twin Track]

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.

[Tundra Twin Track]

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.

[oxford]

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?

[Tundra Twin Track]

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.

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.

[true temper]

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.

[oxford]

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.

[Tundra Twin Track]

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.

[oxford]

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.

[wierdscience]

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.

[chipmaker4130]

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.

[Tundra Twin Track]

TTT, what voltage and phase(s) do you have in your shop. Also, please post a pic of the actual motor nameplate. There may be options . If you go to your single phase motor I am assuming it is single speed and single phase is not really adaptable to variable speed...

Went back and looked again... Is the pic of the nameplate the motor nameplate? It is confusing as it does not indicate two speed. I guess I just need more info in general.

You can buy IEC mount motors in the USA to simply bolt on if you have any difficulty adapting NEMA style. If it is dual speed then likely dahlander wound and the 3400 rpm is the 1.1kw output. With your 1.5hp, assuming it's 2 pole you get similar output to the 2 speed motor at full and at 1/2 (30hz) Hz settings.

Sorry my mistake, it’s a single speed motor.Does anyone build a VFD that can go 1ph to 440 volt3ph without a transformer?

That looks like a pretty well built and handy machine. It looks open and easy enough to adapt any motor to it without much trouble.

Yes it appears very well built,be nice to leave Original motor but I will wait and see what VFD options are.

Very nice! I take it they must use some sort of gum rubber roller cover to drive against the abrasive side of the belt or???

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.

[plunger]

Not knowing your kind of electricity in N America couldnt you just buy a single phase in 230v ,three phase out 380v vfd.? Isnt 380 close enough for it to work.?

[Tundra Twin Track]

TTT, what voltage and phase(s) do you have in your shop. Also, please post a pic of the actual motor nameplate. There may be options . If you go to your single phase motor I am assuming it is single speed and single phase is not really adaptable to variable speed...

Went back and looked again... Is the pic of the nameplate the motor nameplate? It is confusing as it does not indicate two speed. I guess I just need more info in general.

You can buy IEC mount motors in the USA to simply bolt on if you have any difficulty adapting NEMA style. If it is dual speed then likely dahlander wound and the 3400 rpm is the 1.1kw output. With your 1.5hp, assuming it's 2 pole you get similar output to the 2 speed motor at full and at 1/2 (30hz) Hz settings.

Sorry my mistake, it’s a single speed motor.Does anyone build a VFD that can go 1ph to 440 volt3ph without a transformer?

That looks like a pretty well built and handy machine. It looks open and easy enough to adapt any motor to it without much trouble.

Yes it appears very well built,be nice to leave Original motor but I will wait and see what VFD options are.

Very nice! I take it they must use some sort of gum rubber roller cover to drive against the abrasive side of the belt or???

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.

[Tundra Twin Track]

TTT, what voltage and phase(s) do you have in your shop. Also, please post a pic of the actual motor nameplate. There may be options . If you go to your single phase motor I am assuming it is single speed and single phase is not really adaptable to variable speed...

Went back and looked again... Is the pic of the nameplate the motor nameplate? It is confusing as it does not indicate two speed. I guess I just need more info in general.

You can buy IEC mount motors in the USA to simply bolt on if you have any difficulty adapting NEMA style. If it is dual speed then likely dahlander wound and the 3400 rpm is the 1.1kw output. With your 1.5hp, assuming it's 2 pole you get similar output to the 2 speed motor at full and at 1/2 (30hz) Hz settings.

Sorry my mistake, it’s a single speed motor.Does anyone build a VFD that can go 1ph to 440 volt3ph without a transformer?

That looks like a pretty well built and handy machine. It looks open and easy enough to adapt any motor to it without much trouble.

Yes it appears very well built,be nice to leave Original motor but I will wait and see what VFD options are.

Very nice! I take it they must use some sort of gum rubber roller cover to drive against the abrasive side of the belt or???

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.