Skat magnum wearring

[ISeeWetPeople]

So.. i got this skat 148mm magnum pump. Problem is that someone has put a 145mm wearring in it. I want to make it 148 again.

i think there is 2 way to do it.

1 lahte and grind it to right size (what is it with 148mm impeller?)

2 buy new wearring that is fit for 148.

So what do you guys think. What shall i do. And how do i do it

 

[fastgtfairlane]

If you have access to a lathe to machine it properly, why not? If I didn't have access to a lathe to get it done cheap yourself, I dont think its worth the cost for gain. Also not familiar with what machining costs would be on that

 

[ISeeWetPeople]

If you have access to a lathe to machine it properly, why not? If I didn't have access to a lathe to get it done cheap yourself, I dont think its worth the cost for gain. Also not familiar with what machining costs would be on that

My consern is that how to attach that to lathe so it would be safe. It is expensive pump. And other thing is that stainles steel is hard to machine

 

[Storbeck]

Hard to see in the picture, but it looks like the inlet portion of the pump is aluminum at the 145mm, then there is a stainless wear ring pressed in (probably installed by heating the pump actually). If that's the case you wouldn't be able to just replace the wear ring it will have to be machined at least the aluminum portion in order to use it as a 148mm pump.

I would start by trying to contact Skat, but with international shipping I would guess that even if you get ahold of Skat and they are willing to make the change for you it will probably be less expensive to have a local machine shop modify it. Make sure you have a machinist that knows what they're doing because it will be a little tricky.

This is all coming from a guy with no expertise on pumps and minimal on machining, so keep that in mind.

But end of the day, probably cheapest to find a good local machinist. Maybe one of the above could recommend one that is at least on your side of the Atlantic.

Also there are some international guys on this board that could maybe help. I think @Christian_83 is in Denmark (?) and he seems fairly resourceful. Maybe knows somebody around there that is good with machining or possibly even specializes in this sort of thing.

 

[ISeeWetPeople]

Hard to see in the picture, but it looks like the inlet portion of the pump is aluminum at the 145mm, then there is a stainless wear ring pressed in (probably installed by heating the pump actually). If that's the case you wouldn't be able to just replace the wear ring it will have to be machined at least the aluminum portion in order to use it as a 148mm pump.

I would start by trying to contact Skat, but with international shipping I would guess that even if you get ahold of Skat and they are willing to make the change for you it will probably be less expensive to have a local machine shop modify it. Make sure you have a machinist that knows what they're doing because it will be a little tricky.

This is all coming from a guy with no expertise on pumps and minimal on machining, so keep that in mind.

But end of the day, probably cheapest to find a good local machinist. Maybe one of the above could recommend one that is at least on your side of the Atlantic.

Also there are some international guys on this board that could maybe help. I think @Christian_83 is in Denmark (?) and he seems fairly resourceful. Maybe knows somebody around there that is good with machining or possibly even specializes in this sort of thing.

Outer shell is aluminium. Vein part is stainless and so is 145mm part (wear ring section)

I took center hub of by freezing it. And i think that i can tear it a part totally. Hard but maby i can i did contact skat but it takes while to get reply. I wrote here to ask if any one else is done this

 

[Storbeck]

Hard to tell in the picture, but I don't see a seam where the blue circle is, I think I see a seam where the red circle is. If that is the case then the part where the blue arrow is would be aluminum, and the part where the red arrow is would have a pressed in stainless liner.

So even if the liner was replaced with a 148mm sized liner, the aluminum part would still need to be machined.

Or....I'm just misinterpreting the picture, which is very possible.


If I was doing this, I would put it in a four jaw by the stator end, then put a threaded rod though the lathe through-hole with a big washer to clamp the stator up against the face of the chuck. I'd be very nervous.

 

[ISeeWetPeople]

Pump is this.

Blowsion. Skat-Trak Standard Billet Magnum Pump - Yamaha

Skat-Trak Standard Billet Magnum Pump - Yamaha

www.blowsion.com

So in that blue circle is half outer shell aluminium and inside is " ss pipe" that is 3mm thick

blue area is one pipe no seams. So where the impeller spins, there is only one pipe that is now 145mm but it left skat-track with 1r8mm inner diameter

 

[ISeeWetPeople]

 

[Big Kahuna]

I guess I am blind, I am not seeing a separate pressed in wear ring.

 

[ISeeWetPeople]

I have 108 megapixel camera in my phone. But when i post them its like i took my photos with a cucumber..

 

[Storbeck]

Super hard to take pictures of shiny things I feel your pain!

 

[ISeeWetPeople]

If u guys just trust me i know the difference between aluminium and ss.. outer shell is alu and there is ss tube inside that. Ss tube is 145mm inside and outside it is 6mm more (3mm each side) if i could snap my fingers and took it apart. There would be 3 objects on the table..

1 stator ss
2 wear ring ss
3 outer shell.. aluminium

 

[ISeeWetPeople]

There is bolts on each side to hold that ss inner tube on place

 

[ISeeWetPeople]

You can even see on the welds that outer shell is aluminium. And stator is ss and so is wearring

 

[Big Kahuna]

How thick is the wear ring itself? If they bored out the pump to make the ring fit, then if you remove the ring your tolerance would be well more than 148mm. Could you chuck the pump up in a boring machine and bore it out to 148 and still have the wear ring in it.

 

[ISeeWetPeople]

Ring is 3mm thick. If i bore it to 148 there would be 1.5mm on each "side" it must be possible since this pump used to be 148. I think i ask local machinery for help. They can tell me if they can put it in lache or bore machine

 

[Christian_83]

So here is what i would do.
Basically what you trying to do no, is the same thing as pulling a sleeve out of a engine (alu block, steel sleeve)
Alu expands faster than stainless.

I would start, by putting the pump in the oven, at 180 deg C and let it heatsoak for 1 hour, at this temp the alu will expand pretty good and any loctite should melt.
Take it out with welding gloves and see if you can take out the wearring / sleeve from the pump.

If it dosent.
I woldt try and tack weld the wearring / sleeve to a bar ot rod, to pull wearring out, when pump is out of oven 2. time.

BUT. could look like someone machined the 148 pump out to accept a 150mm impeller.
I dont think the skat 1 piece 148mm pump came with a wearring (other than the alu housing)

So i think I would either pull out sleeve and run it as is (150mm) or get a local machinist to machin the curretn wearring to 148mm
Could be done in lathe, but im pretty sure it can be done on a mill and a drill press with flycutter

 

[ISeeWetPeople]

Do you say that this left skat facyory with alu surface against impeller and no replaceable wear ring parts?

 

[ISeeWetPeople]

Sleeve will drop by itself in oven. Maybe with this too. I have to ask skat for clearence info. So i know what size do i bore/machine it

 

[///M5]

Do you say that this left skat facyory with alu surface against impeller and no replaceable wear ring parts?

I don't think that is correct, I personally would call Skat. Their email response can sometimes be a little slow.

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