one.R-roller
R-roller Conveyor Chains have rollers with an outer diameter bigger than the width of plates.
Since the rollers can conveniently roll, the chain is appropriate for running about the floor even though the rollers get the reside load.
two.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 get the force acting within the lateral sides of your chain, the chain is ideal for obtaining the two a dwell load plus 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 designed for smoother engagement using the sprockets. Because the chain is light in excess weight, it truly is suitable 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 appropriate 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 primarily identical structure to R-roller and F Conveyor Chains, respectively, except for the bearings inside for smoother rotation.
6.UR- and UF- Rollers (huge clearance involving bushing and roller)
UR- and UF- Roller Conveyor Chains have mostly identical structure to R-roller and F Conveyor Chains, respectively. Nonetheless, the clearances amongst the outer diameter of bushings as well as the inner diameter of the rollers are enlarged to prevent the rollers from repairing when foreign matters enter.