Mastermind Meets The Echo CST-610EVL

[ELECT6845]

I understand why he ran the bead and stopped it away from the joint but it still looks like the bead is way off of the joint in the lower one. The top one looks fine.
I am sure that the pin wont come out but it still looks like he missed his mark on the lower one to me.

Later
Dan

I agree

 

[Mastermind]

I understand why he ran the bead and stopped it away from the joint but it still looks like the bead is way off of the joint in the lower one. The top one looks fine.
I am sure that the pin wont come out but it still looks like he missed his mark on the lower one to me.

Later
Dan

I see what you are looking at now Dan. The lower weld is off center of the joint.

 

[DSS]

Them off center joints can affect your navigation and stuff. Just sayin.

 

[dozerdan]

I agree

Glad to hear it. I thought maybe it was just the way I was looking at it.

Later
Dan

 

[Metals406]

Being that the weld isn't exactly dead center on the bottom shouldn't matter -- you can see the toes were plenty hot with good fusion.

For the guys that care about welding stuff -- for future mental reference -- it's usually a really good idea to add filler for strength. Not saying it is necessary here, but a convex bead is stronger than a concave bead.

And for welding dissimilar metals, a 309 stainless filler is okay -- a 312 is really good.

End of lesson.

 

[srcarr52]

Since the start and the end of the welds are the weakest points (most likely to start cracks) it's good that he left those off the parting line and in the cast material where it's unlikely they will start a crack.

 

[dozerdan]

hot with good fusion.

For the guys that care about welding stuff -- for future mental reference -- it's usually a really good idea to add filler for strength. Not saying it is necessary here, but a convex bead is stronger than a concave bead.


End of lesson.

I agree but I didn't say anything about that because I don't think there is enough clearance between the bead and the case for a convex bead.

Later
Dan

 

[Hddnis]

Filler metal and convex beads add weight. If you were expecting the welds to take the stresses of an operating crank you would need that kind of strength and probably a lot more welding to say the least. But this weld is kind of like an index pin on a piston ring, it just holds it in place.




Mr. HE

 

[Metals406]

Filler metal and convex beads add weight. If you were expecting the welds to take the stresses of an operating crank you would need that kind of strength and probably a lot more welding to say the least. But this weld is kind of like an index pin on a piston ring, it just holds it in place.




Mr. HE

Yup, that's why I said that a convex bead wasn't necessarily needed in this case. It was more of a thumb-rule, or point of fact for welding. :msp_wink:

 

[Hddnis]

Yup, that's why I said that a convex bead wasn't necessarily needed in this case. It was more of a thumb-rule, or point of fact for welding. :msp_wink:

Don't worry, I was sure you knew that, mostly I was just posting to watch myself type.



Mr. HE

 

[7sleeper]

Now that the weld has been elaborately reviewed can we see the finished product?

7

 

[Mastermind]

Now that the weld has been elaborately reviewed can we see the finished product?

7

I'll post a picture of the new pistons in a day or two........we can have them reviewed next. :cool2:

 

[thomas1]

I'll post a picture of the new pistons in a day or two........we can have them reviewed next. :cool2:

Do they look like butterflies?

 

[Mastermind]

Do they look like butterflies?

Allegedly.

 

[Hddnis]

I'll post a picture of the new pistons in a day or two........we can have them reviewed next. :cool2:

Any concavature we should worry about, or convexture for that matter?

I'm personally in favor of convexture and concavature in the right places. Put them together just right and you have curvy. I like curvy.





...and I like pie too.







Mr. HE

 

[Jacob J.]

Do they look like butterflies?

They had to be passed through the digestive tract of a polar bear, like that expensive coffee where the beans are eaten and excreted by a civet cat.

The hard part is following the polar bear around with a baggie and a scoop shovel.

 

[DSS]

They had to be passed through the digestive tract of a polar bear, like that expensive coffee where the beans are eaten and excreted by a civet cat.



The hard part is following the polar bear around with a baggie and a scoop shovel.

And that's in the summer.

 

[thomas1]

They had to be passed through the digestive tract of a polar bear, like that expensive coffee where the beans are eaten and excreted by a civet cat.

The hard part is following the polar bear around with a baggie and a scoop shovel.

I feel you inching closer. Do not be afraid, it's just peachy on the OTF/GFY side of the fence.

 

[thomas1]

And that's in the summer.

Exactly how would you know about summer?

Oh, YouTube. Duh.

 

[Mastermind]

I feel you inching closer. Do not be afraid, it's just peachy on the OTF/GFY side of the fence.

Like one big ####ed up dysfunctional family and stuff. :msp_smile: