one.R-roller
R-roller Conveyor Chains have rollers with an outer diameter more substantial compared to the width of plates.
Since the rollers can easily roll, the chain is ideal for running on the floor while the rollers acquire the reside 
load.
2.F-roller
F-roller Conveyor Chains have rollers with all the exact same outer diameter as that of R-roller but with flanges.
Since the flanges can receive the force acting within the lateral sides from the chain, the chain is suitable for getting each a live load along with a lateral load.
three.M-roller
M-roller Conveyor Chains have rollers with an outer diameter somewhat smaller compared to the width of plates.
An M roller is built for smoother engagement with the sprockets. Because the chain is light in weight, it is actually ideal for vertical conveyance.
4.S-roller
S-roller Conveyor Chains have rollers with an outer diameter smaller than that of the M-roller.
The chain is suitable for vertical conveyance exactly where rollers are less more likely to be worn.
5.BR- and BF- Rollers (with built-in bearings)
BR- and BF- Roller Conveyor Chains have primarily identical framework to R-roller and F Conveyor Chains, respectively, except to the bearings within for smoother rotation.
six.UR- and UF- Rollers (big clearance involving bushing and roller)
UR- and UF- Roller Conveyor Chains have generally identical framework to R-roller and F Conveyor Chains, respectively. However, the clearances concerning the outer diameter of bushings along with the inner diameter of your rollers are enlarged to prevent the rollers from repairing when foreign issues enter.