1.R-roller
R-roller Conveyor Chains have rollers with an outer diameter greater compared to the width of plates.
Since the rollers can very easily roll, the chain is suitable for running to the floor though the rollers receive 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.
Since the flanges can get 
the force acting within the lateral sides in the chain, the chain is suitable for obtaining each a live load and also 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 created for smoother engagement with all the sprockets. Because the chain is light in fat, it is appropriate for vertical conveyance.
4.S-roller
S-roller Conveyor Chains have rollers with an outer diameter smaller sized than that of the M-roller.
The chain is ideal for vertical conveyance wherever rollers are less prone to be worn.
5.BR- and BF- Rollers (with built-in bearings)
BR- and BF- Roller Conveyor Chains have generally identical framework to R-roller and F Conveyor Chains, respectively, except to the bearings within for smoother rotation.
six.UR- and UF- Rollers (huge clearance in between bushing and roller)
UR- and UF- Roller Conveyor Chains have largely identical structure to R-roller and F Conveyor Chains, respectively. Even so, the clearances in between the outer diameter of bushings along with the inner diameter on the rollers are enlarged to avoid the rollers from repairing when foreign matters enter.
