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 conveniently roll, the chain is suitable for operating within the floor whilst the rollers acquire the dwell load.
2.F-roller
F-roller Conveyor Chains have rollers together with the similar outer diameter as that of R-roller but with flanges.
Since the flanges can receive the force acting to the lateral sides of the chain, the chain is appropriate for obtaining both a live load as well as a lateral load.
three.M-roller
M-roller Conveyor Chains have rollers with an outer diameter slightly smaller sized than the width of plates.
An M roller is intended for smoother engagement using the sprockets. Because the chain is light in weight, it is actually suitable for vertical conveyance.
four.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 
prone to be worn.
five.BR- and BF- Rollers (with built-in bearings)
BR- and BF- Roller Conveyor Chains have mostly identical structure to R-roller and F Conveyor Chains, respectively, except for your bearings inside for smoother rotation.
six.UR- and UF- Rollers (substantial clearance among bushing and roller)
UR- and UF- Roller Conveyor Chains have largely identical structure to R-roller and F Conveyor Chains, respectively. Nevertheless, the clearances amongst the outer diameter of bushings plus the inner diameter on the rollers are enlarged to prevent the rollers from fixing when foreign matters enter.
