This is the first bike build I've attempted, so far the process has been pretty difficult but I'm especially struggling with the Bottom Bracket installation.
Firstly, I have a frame with a threaded BB shell, so I bought a threaded bottom bracket, like this one: Threaded Borrom Bracket. This went horribly though, I wasn't sure what to expect in terms of force when screwing it in, I think I ended up with it misaligned and forced it, destroying the threads on my new frame in the process...
To work around that, I bought a BB that doesn't engage with the threads on the frame but threads together instead. Here it is: Bottom bracket number 2.
I have 2x 16 notch tools I can use for installation (1 to hold the other side) but I can't even get it in the shell all the way.
Do I need something to press it in, or is this just a case of my second bottom bracket being not suitable for a frame with a threaded shell?
Any help with this would be appreciated, despite a lot of niggly issues and incorrect part selection on my part, I'm quite enjoying the whole process.
Here's an extra picture of the empty shell which is threaded (well, crossthreaded now...)
Each side of the BB is fitted with a silver notched cup, that I can remove. If I take this off, the BB does fit into the shell and I can thread it into the other half. I just can't seem to get it tight enough to stop the BB from spinning in the shell.
I also noticed that when I full tighten the BB, the square pegs won't spin anymore.
As requested in the comments, here is a close up of the original threaded bottom bracket I purchased originally (Link at the top) and a picture of the side of the shell that it won't screw into. It looks very neatly cross threaded to me, I was really angry at myself for doing that...
** Hopefully the final edit **
So I've managed to screw in the Tange BB, it actually went in 99% of the way by hand very easily. I tightened it with reasonable force at the end using a Torque wrench but I didn't want to over do it. I notice the non-drive side I can still see 1 thread but it doesn't seem to want to go in any further easily. The drive side is all the way in and flush to the shell. Does this look correct and as expected? I consulted a few video guides from ParkTool but not much was mentioned on expected "flushness" of the cup on that side.
Here are some pictures: