Thread: OMES MEC 70 metal cutting cold saw (WIP)

Hi Matrix,

I'm curious about JB weld, as mentioned in your thread.

I have a couple of dings on machined surfaces of my Hercus lathe.

Will JB weld, take on the appearance of shiny metal when machined and/or polished?

Does it dry clear when fully cured?

Regards,

Ken

Originally Posted by neksmerj

Hi Matrix,

I'm curious about JB weld, as mentioned in your thread.

I have a couple of dings on machined surfaces of my Hercus lathe.

Will JB weld, take on the appearance of shiny metal when machined and/or polished?

Does it dry clear when fully cured?

Regards,

Ken

Hi Ken, it doesn't really look like metal when sanded, but polishing it may give a different effect. I do believe from their website that they are working on a clear epoxy.

Here is a pic of it sanded with 120grit.

Hi Matrix,

I too have a qustion for JB Weld I notice it is surrounding a screw hole is it really strong enough to take the tension.

I have no idea just asking so I can file it6 in the memory bank.

Cheers

Originally Posted by Outsider

Hi Matrix,

I too have a qustion for JB Weld I notice it is surrounding a screw hole is it really strong enough to take the tension.

I have no idea just asking so I can file it6 in the memory bank.

Cheers

If you look at that pic of that cracked thread before I filled it, you can see that there is more than 50% of the thread diameter left so, as it was you could still screw in the grub screw. I drilled a bunch of holes to help anchor the epoxy to the metal. As its only a grub screw with not a whole lot of pressure I think is should hold. Its not critical either so I figured I don't have much to lose if it fails. Sure was easier and quicker than messing around with brazing or welding.

I know plenty of people on another forum who constantly use it to repair problems on chainsaws which have a lot of vibrations.

Here are some stats from the website. and just for ther record, Kmart do stock JB Weld.


Properties (psi)

Tensile Strength: 3960 Adhesion: 1800 Flex Strength: 7320 Tensile Lap Shear: 1040 Shrinkage: 0.0% Resistant to: 500° F Mechanics -- you can use J-B WELD with confidence. It is designed for safe, reliable, permanent repairs in engine compartments and heated environments up to 500° F. It's strong as steel and impervious to water, gasoline, chemicals, and acids. Working with J-B WELD is quick, easy, and convenient -- and saves you time, work, and money!
Not recommended for use on manifolds, exhaust systems, and other engine components which normally operate at temperatures above 500° F.