motor id

[Andy™]

Can anyone ID this motor? need to find a replacement after it burnt out. going by its thermal overload, it look like a 5.5kw, but no idea if its 2 or 4 pole. any easy way to find that out?



the more observant may notice the rear end is a little odd, thats because most of the fan has been chopped off so its just a spinning disc, and then a much smaller end of another motor was duct taped to the end. probably contributed to its death

 

[Sidewinder]

You can get the power from the frame size, that is the shaft height and body length I suspect.

There is some info in the British Standards that will help, also, you could look on a motor OEM website to get data from a catalogue.

As far as 2, 4, 6, 8 pole etc. goes it's a bit more complex.

You can't get this from the outside.

Canoe is the one to tell you what the difference is inside, but it will probably involve cutting the windings open.

If you need any specific info please ask as I may have it rather than having to download it again.

However, not back in the office until Friday as I'm away working from tomorrow morning.

 

[Andy™]

thought as much. its from a large bandsaw so i guess i could calculate the RPM from blade speed etc. anyone know what a normal speed of bandsaw blade would be? its a large one, about 7' high. ill get some more measurements from it tomorrow, didnt have much time today

 

[Evans Electric]

It looks like a standard 3 ph motor from here Andy .

Are the rear terminals linked out  or can I see a wire link between each three , so Delta connection. ?

Are the windings all the same reading ?  Down to earth ?  Short across?  

As you say , the fan was there for a reason .

TBH I usually ask at the rewinders  . 

 

[Andy™]

delta connections. 1 winding is O/C, one was around 4.8, another around 6. IR between each and earth all good. there is a re-winders 1/2 hour away so i could take it there, but it might be easier to just get a new one if i can find out what it needs to be

 

[poni]

can not just ask the makers of the saw?

 

[Andy™]

ive just sent them an email, see if i get a reply tomorrow or not

 

[Sidewinder]

Who are the saw builder Andy?

I might have motor records here for it, remember I do LOTS of woodworking stuff.

 

[Andy™]

wadkin bursgreen. no idea of age, but probably 20+

 

[Sidewinder]

OK, model I have most of the Wadkin manuals here, and, I'm guessing that you have messaged Daltons (Wadkin) who are not really Wadkin at all.

I personally know a couple of Ex-Wadkin (REAL Wadkin) directors and do business with them now.

So I get any tech info they have off their company without issue.

So, I need the model, serial & test number., & I can bet you the spec on the motor.

My gut feeling is it's a Wadkin PBR-HD or one of the C series looking at the motor now you have said that.

 

[Andy™]

there is a label with C8-79151 engraved on it, so could well be a C series

 

[Sidewinder]

It's a C8.

Hang on.

 

[Sidewinder]

It's 2 pole either 4 or 5.5kW.

5.5 was an option.

Standard is 100 frame long 4kW.

You would need to check if it's 100 or 112, if it's 112 it would be 5.5.

It would be a 1MB5 type which is a flange mount with clearance holes & spigot.

Spigot should be 130 dia.

Mind, I think a 112 would fit, so check the overload and see what matches full load current for a 4kW or 5.5kW, that will tell you.

 

[Tony S]

All I can tell from the picture is it’s delta connected which isn’t a lot of help.

A bandsaw motor isn’t likely to be all that fast due to the size of the band drive wheels so its highly unlikely to be a 2 pole.

Look at the blade and it should have a maximum speed printed on it or the packaging. That will give you the peripheral speed of the wheels. A bit of maths working out circumferences and ratios should give you the motor speed.

 

[Sidewinder]

Tony,

It is doubtful that you will find any speeds on a bandsaw blade these days, nor the packaging!

The way of the world.

I have the C8 operator, spares & service manual, which is where I got the info from earlier.

 

[Andy™]

It's 2 pole either 4 or 5.5kW.

5.5 was an option.

Standard is 100 frame long 4kW.

You would need to check if it's 100 or 112, if it's 112 it would be 5.5.

It would be a 1MB5 type which is a flange mount with clearance holes & spigot.

Spigot should be 130 dia.

Mind, I think a 112 would fit, so check the overload and see what matches full load current for a 4kW or 5.5kW, that will tell you.

ill get some measurements from it tomorrow. the thermal overload is a crompton CR09/10. at least ive got a better idea what to look for now

All I can tell from the picture is it’s delta connected which isn’t a lot of help.

A bandsaw motor isn’t likely to be all that fast due to the size of the band drive wheels so its highly unlikely to be a 2 pole.

Look at the blade and it should have a maximum speed printed on it or the packaging. That will give you the peripheral speed of the wheels. A bit of maths working out circumferences and ratios should give you the motor speed.

exactly what i was thinking, just wasnt sure of blade speed. didnt think it to look on the actual blade. i was expecting it to be 4 pole

 

[Sidewinder]

Andy,

It won't be on the blade, trust me.

Does the machine have any suppliers labels on it?

One of the big dealers up your way is DPW,

I know Dennis uses Crompton kit exclusively.

That O/L is...

 

[Tony S]

The drive wheels will have the peripheral speed marked in the housing

 

[kerching]

I Just love this place!

just over an hour into the thread and it is nearly sorted.   :Salute

just goes to show that NONE of us knows as much as ALL of us

 

[Sidewinder]

7.0-10.0A FLC