1.R-roller
R-roller Conveyor Chains have rollers with an outer diameter more substantial than the width of plates.
Because the rollers can easily roll, the 
chain is suitable for running within the floor when the rollers receive the live load.
2.F-roller
F-roller Conveyor Chains have rollers using the similar outer diameter as that of R-roller but with flanges.
Because the flanges can obtain the force acting within the lateral sides of your chain, the chain is suitable for getting each a reside load and a lateral load.
three.M-roller
M-roller Conveyor Chains have rollers with an outer diameter somewhat smaller sized than the width of plates.
An M roller is intended for smoother engagement together with the sprockets. Because the chain is light in excess weight, it can be ideal for vertical conveyance.
4.S-roller
S-roller Conveyor Chains have rollers with an outer diameter smaller sized than that of your M-roller.
The chain is ideal for vertical conveyance exactly where rollers are significantly less prone to be worn.
5.BR- and BF- Rollers (with built-in bearings)
BR- and BF- Roller Conveyor Chains have mostly identical framework to R-roller and F Conveyor Chains, respectively, except for the bearings inside for smoother rotation.
six.UR- and UF- Rollers (large clearance in between bushing and roller)
UR- and UF- Roller Conveyor Chains have mostly identical framework to R-roller and F Conveyor Chains, respectively. On the other hand, the clearances involving the outer diameter of bushings and also the inner diameter in the rollers are enlarged to avoid the rollers from fixing when foreign issues enter.