one.R-roller
R-roller Conveyor Chains have rollers with an outer diameter larger than the width of plates.
Because the rollers can very easily roll, the chain is ideal for operating about the floor while the rollers get the dwell load.
two.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 acquire the force acting around the lateral sides of the chain, the chain is suitable for receiving each a dwell load along with a lateral load.
3.M-roller
M-roller Conveyor Chains have rollers with an outer diameter slightly smaller sized compared to the width of plates.
An M roller is designed for smoother engagement with the sprockets. Because the chain is light in weight, it’s 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 suitable for vertical conveyance where rollers are less prone to be worn.
five.BR- and BF- Rollers (with built-in bearings)
BR- and BF- Roller Conveyor Chains have generally identical construction to R-roller and F Conveyor Chains, respectively, except to the bearings within for smoother rotation.
six.UR- and UF- Rollers (large clearance between bushing and roller)
UR- and UF- Roller Conveyor Chains have typically identical construction to R-roller and F Conveyor Chains, respectively. On the other hand, the clearances amongst the outer diameter of bushings and also the inner diameter of your rollers are enlarged to avoid the rollers from fixing when foreign issues enter.
