one.R-roller
R-roller Conveyor Chains have rollers with an outer diameter bigger than the width of plates.
Since the rollers can easily roll, the chain is appropriate for running about the floor even though the rollers get the reside load.
2.F-roller
F-roller Conveyor Chains have rollers with all the same outer diameter as that of R-roller but with flanges.
Because the flanges can acquire the force acting about the lateral sides of your chain, the chain is ideal for obtaining the two a live load and also a lateral load.
three.M-roller
M-roller Conveyor Chains have rollers with an outer diameter slightly smaller compared to the width of plates.
An M roller is developed for smoother engagement using the sprockets. Because the chain is light in excess weight, it can be appropriate for vertical conveyance.
4.S-roller
S-roller Conveyor Chains have rollers with an outer diameter smaller sized than that with the M-roller.
The chain is ideal for vertical conveyance in which rollers are significantly less more likely to be 
worn.
5.BR- and BF- Rollers (with built-in bearings)
BR- and BF- Roller Conveyor Chains have generally identical structure to R-roller and F Conveyor Chains, respectively, except for your bearings inside for smoother rotation.
6.UR- and UF- Rollers (massive clearance involving bushing and roller)
UR- and UF- Roller Conveyor Chains have mainly identical structure to R-roller and F Conveyor Chains, respectively. Nonetheless, the clearances amongst the outer diameter of bushings along with the inner diameter of the rollers are enlarged to stop the rollers from repairing when foreign matters enter.