Boring Mahle Cylinders

[Henry Schmidt]

Originally Posted by Lapkritis

Usually warped or out of round. If you're welding before you hone and re-plate then going to be real hard to tell the difference all done... unless you take a map gas torch to them and melt them causing damage to the substrate... which I think is what Henry is describing. You should be able to avoid that as an experienced welder with temperature control.

What a putz: When did I ever say anything about "map gas torch". I was relating what the professional welder at Millennium told me. This would be the guy that welds aluminum cylinders all day long, at a facility world famous for their quality.

Please try your best to limit your statements to anything but what you think I said.

[Lapkritis]

Wow.

[Lapkritis]

Originally Posted by Henry Schmidt

What a putz: When did I ever say anything about "map gas torch". I was relating what the professional welder at Millennium told me. This would be the guy that welds aluminum cylinders all day long, at a facility world famous for their quality.

Please try your best to limit your statements to anything but what you think I said.

Just wow. I meant nothing more than damage to the substrate. Wow again.

[Lapkritis]

Originally Posted by bumble

Thanks - the reason I ask is that the guy at the plating shop said he'd seen several that had been overheated and were 'too soft' and had to be tossed out.

The process of honing these with precision can be quite time consuming. The bore measurement changes and the cylinder heats unevenly when being cut. To bore with accuracy can be quite costly as you wait for the cylinder to cool for a uniform measurement during the process. I'm wondering if the plater meant the cylinders became soft when overheated (they do) and when cooled were well out of round. This would be more likely in my experience.

[AlfonsoR]

Originally Posted by bumble

Thanks - the reason I ask is that the guy at the plating shop said he'd seen several that had been overheated and were 'too soft' and had to be tossed out.

They might be able to tell by either attempting a weld and then judging the material too soft by how the parent material takes to the weld or they could also do a hardness test prior to welding.

What ever way, they seem to be deducing by experience that when a material is too soft, that it has been caused by overheating.

If you really want to know, calling the folks at Millenium is probably your best bet.

[Lapkritis]

http://www.lnengineering.com/reconditioning.html

LN advertises welding as part of their reconditioning services.

[Henry Schmidt]

Originally Posted by Lapkritis

Cylinder Reconditioning

LN advertises welding as part of their reconditioning services.

Very good. If you call Millennium and ask if the can weld LN Nickies, their response will be: "yes, we do work for Charles all the time." Millennium is actually closely involved with the production of Nickies.
Nickies are not Mahles and as such utilize different materials. Different materials react differently to differing processes. Different aluminum alloys respond differently to welding processes. There is also the different in process. The Nickies are forged and the Mahles are cast. This difference in structure also creates a challenge.
Nothing new here.

[Lapkritis]

I'm guessing you didn't open the link. The welding is for reconditioning historic cylinders, not his new production LN Nickies. Still knowing everything? Nothing new here.

From the link:

"If you have an aluminum cylinder that is damaged where there plating or coating is gouged, we can fix that too. With careful welding, we can build up the area and have the cylinder bored out and plated back to it's original size. We also offer cryogenic treatment of used and repaired cylinders and pistons."

[Henry Schmidt]

Originally Posted by Lapkritis

I'm guessing you didn't open the link. The welding is for reconditioning historic cylinders, not his new production LN Nickies. Still knowing everything? Nothing new here.

...edit....

How deep do you want to dig this hole?

Sometimes what you know is more important than what you read.
In this case what I know is that Millennium does all the cylinder repair work for LN Engineering.
At this time, Millennium has two sets of my cylinders. One set of Mahles has a gouged cylinder that can not be welded because Millennium can't weld Mahle cylinders.

So, just to be clear: if Millennium does all of LN cylinder plating & repair (quote Steve @ LN)and Millennium can't weld Mahle cylinders (quote from Millennium welder) then it seems logical that LN can't weld Mahle cylinders.

So now I guess you'll perpetuate the idea that LN lied? I wish Charles and Millennium hadn't gotten draw into the goofy world of Andrew.

[Lapkritis]

Take it easy there big guy- it doesn't state that on his page.