1.R-roller
R-roller Conveyor Chains have rollers with an outer diameter greater than the width of plates.
Because the rollers can conveniently roll, the chain is suitable for working over the floor when the rollers receive the live load.
two.F-roller
F-roller Conveyor Chains have rollers with the identical outer diameter as that of R-roller but with flanges.
Because the flanges can obtain the force acting to the lateral sides of the chain, the chain is suitable for getting each a dwell load and 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 together with the sprockets. Because the chain is light in bodyweight, it’s suitable for vertical conveyance.
4.S-roller
S-roller Conveyor Chains have rollers with an outer diameter smaller than that from the M-roller.
The chain is suitable 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 typically 
identical structure to R-roller and F Conveyor Chains, respectively, except for the bearings inside for smoother rotation.
6.UR- and UF- Rollers (massive clearance between bushing and roller)
UR- and UF- Roller Conveyor Chains have generally identical construction to R-roller and F Conveyor Chains, respectively. Nonetheless, the clearances between the outer diameter of bushings along with the inner diameter in the rollers are enlarged to prevent the rollers from fixing when foreign issues enter.
