I just got in two new 280Ah cells which look great but the tapped aluminum threads are very shallow (3 to 3-1/4 threads deep).
After already having stripped a thread that was only 4 threads deep and having characterized that all of my other threads were ~5 threads deep, I’m pretty certain that even if I glue a grubscrew into these pristine shallow threads, it’s unlikely to take 35 inch-lbs and will probably pull out.
So I am very eager to hear anyone’s advice as to how best to salvage these shallow-tapped threads.
I’m thinking I may try to still deeper holes and modify an M6 tap to make it a bottoming tap in an attempt to get another 2 threads down.
Has anyone else gotten cells with so few threads? Anyone else either had no issues with 3 full threads withstanding 35 inch-lbs or had such shallow threads strip?
Anyone else attempted to tap shallow M6 threads deeper?
After already having stripped a thread that was only 4 threads deep and having characterized that all of my other threads were ~5 threads deep, I’m pretty certain that even if I glue a grubscrew into these pristine shallow threads, it’s unlikely to take 35 inch-lbs and will probably pull out.
So I am very eager to hear anyone’s advice as to how best to salvage these shallow-tapped threads.
I’m thinking I may try to still deeper holes and modify an M6 tap to make it a bottoming tap in an attempt to get another 2 threads down.
Has anyone else gotten cells with so few threads? Anyone else either had no issues with 3 full threads withstanding 35 inch-lbs or had such shallow threads strip?
Anyone else attempted to tap shallow M6 threads deeper?