2015 POTD Thread Archive

[zmotorsports]

I have a clients 2009 Jeep Wrangler Unlimited Rubicon in the shop that I am regearing as well as beefing up the front axle with sleeves and gussets.

Here you can see the holes drilled and I am ready to install the sleeve into the short side axle tube.


Sleeve viewed from the knuckle end.


Long side axle tube with the sleeve installed. You can see the sleeve inside the drilled .5" holes ready for welding.


In progress welding pics.




Rosette weld, sometimes called a plug weld.


Some various welds from the project.






Axle welding completed.




Next up is replacing the factory 4.10 gearset with 5.38:1 gears.

Mike.

 

[Pontiac Freak]

finally got the chance to do some work on the ball turner I have been building for my lathe.

 

[zmotorsports]

[QUOTE="Pontiac Freak, post: 303451, member: 60104459[/ATTACH] View attachment 104460 finally got the chance to do some work on the ball turner I have been building for my lathe.[/QUOTE]

I need to get off my butt and get going on my radii turning attachment. It is on my "to do" list, it is just that my "to do" list is getting longer rather than shorter.

Mike.

 

[chevydyl]

What kind of tool is used on your ball turner? When I do mine it will hold a tcmt Triangle

 

[Pontiac Freak]

What kind of tool is used on your ball turner? When I do mine it will hold a tcmt Triangle

HSS tool bit is what the plans call for.

 

[pineyfolks]

A little threading on a barrel

 

[petcnc]

My 29.9cc 2-Cycle Gas-Powered Straight-Shaft String Trimmer with Split Shaft suddently started to make very loud complains and stopped working yesterday.


So today I took it to the operation room (shop) for a small internal check.

I started by removing the peripheral things


To reach the combustion chamber and have a look



The area under the piston was not looking healthy


First of all I think that a part of the securing pin is missing! I dont think that these pins have just one end!



Besides that the area was full of metal parts! Not a good sign!


Some very nasty scratches gave me an indication of the noise source!

When I removed the piston I noticed the deepest scratches I have seen on a small piston! Something really hard found its way in there!

The poor piston died bravely on duty.

What about the chamber? Did it survive?
I think NO It is also badly scratched.
My verdict is that I need a new string trimmer as a tiny steel wire from the securing pin was enough to kill it


So long my little trimmer!

 

[chevydyl]

One thing to note is that 2 stroke engines need ample time to warm up or you can cold seize the piston, also to rich a fuel mixture can he detrimental to the piston skirts

 

[petcnc]

This happened after some two hours of work. I think metal fatigue made the whole thing happened. If you consider that the engine is made in China and the security pin worked for a couple of summers making 9800 ups and downs a minute it lasted quite some time

 

[markknx]

Mike todo lists always do get longer.
Mark