Originally Posted by
SquidPuppet
Is it a single speed specific or track crank? As Tejanotrackie pointed out, that spindle length seems too long, unless it's a road crank being used as a single speed.
The Bottom bracket
should be marked, but it is possible that it isn't, or that the markings have been destroyed.
This article is perfect for your needs. It explains the exact differences between JIS and ISO tapers. It also explains their potential interchangeability. You can mix-n-match, but the fit is different and therefore chain line will be affected. Sometimes a desired result can be achieved. Other times it throws things out of wack. The article has big clear color photos too, so identifying what you have should be doable.
https://www.sheldonbrown.com/bbtaper.html
It was a single speed crank. The bottom bracket was in the bottom of a frame i bought. The guy said he didnt have the tools to take it out. Now ive just took it out its rusty as hell. So my guess is that its probably not a single speed bracket if you are saying it is too long. also thanks for the information, ill defiantly check that out