roller chain help

[FMC]

Merry Xmass! I have a very old 1/4 ton electric hoist? it just shredded a roller from the chain, chain is marked link belt USA 622, cannot find a reference for a replacement, is single roller chain a standard? my local supply carries a # 40,#50, #60 with different pitch, is pitch for the gear or center to center of links, this is the drive unit for my dogs elevator so not much weight. Thanks

 

[Big Pete]

6 is the pich in 1/8ths of an inch, the first 2 is the roller diameter, also in 1/8ths, second 2 is usually a manufacturers code, so could mean anything, so you're looking for 3/4" pitch chain with 1/4" rollers.

 

[FMC]

Thank You Big Pete!

 

[FMC]

apparently the numbers on the chain are something else, I pressed some plastacene into the old chain for comparison and this chain is 5/8 on center and 3/8 rollers, installed and working great