stuntridedawhip

I have a 60tooth geared steel sprocket and I don't know the pitch. Anyone might happen to know?

There's a # on the sprocket that reads. PIB USA 3090

f4izzy

are you talking about the width? 520,525,530??

stuntridedawhip

That's correct.

I'm guessing it's a 530 for the "3090" label.

But, I'm not positive and I don't want to waste money on a wild guess.

DirtyToes

i don't think the "3090" label has anything to do with the with...looks just like a model number.

keep looking on the chain....it will say things like "XO" or "XSO"....and keep looking...one of them you will find a 3 digit number.

DirtyToes

nevermind, read you post wrong...thought you had a chain.

according to this(PBI spec sheet), your sprocket is a 525...

http://209.85.173.132/search?q=cache...lnk&cd=9&gl=us

(press control+F and type on in 3090)

....it will show a sprocket made for a f4i and on the right states the pitch to be 525.

stuntridedawhip

Thanks bro.

whitehendrix

pitch is consistent.

5 series is 5/8 pin spacing, 6 series is 3/4" spacing

so a #50 chain OR a 520/525/530 is 5/8 pitch by whatever the width is.

620/625/630 is 3/4 pitch by the width..

width is determined by the roller width.

520 is .252"
525 is .313"
530 is .375"

same holds true for 6 series on the width.

so, if you're ever wondering what the hell a chain is with no markings, measure from the center of the roller to center of the next (or the same edge.. either/or) and note that.. theres pitch.

now, measure the roller width (space between the inner sideplates) if its a cunthair above 1/4" (.252) its 520. if its past that but before 3/8, its 525 (.313") and if its on 3/8 its 530 (.375")