Abstract: In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins and height H of the inner plates satisfy the relationships 0.72P?D?0.79P, 0.40P?d?0.44P, and 0.96P?H, with respect to the chain pitch P. The sprocket teeth are asymmetric in that the chain entering side and the chain leaving side differ, and the radius R1 of an arc of the tooth gap bottom, the radius R2 of the chain entering side tooth flank and the radius R3 of the chain entering side tooth head portion satisfy the relationships 0.505D?R1?0.505D+0.069D, P?(0.505D+0.069D)?R2?P?0.505D, and 0.08?R3?0.13P. The transmission chain exhibits improved endurance and quietness, smooth operation, and resistance to elongation due to wear.

Abstract: In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins, and the height H of the inner plates satisfy the relationships 0.72P?D?0.79P, 0.40P?d?0.44P, and 0.96P?H, with respect to the chain pitch P. The radius r of the arc of the tooth gap bottom of the sprocket teeth satisfies the relationship 0.505D?r?0.505D+0.069{square root over (D)}. The transmission chain exhibits high durability due to improved strength and wear resistance under high loads.

Abstract: In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins and height H of the inner plates satisfy the relationships 0.72P≦D≦0.79P, 0.40P≦d≦0.44P, and 0.96P≦H, with respect to the chain pitch P. The sprocket teeth are asymmetric in that the chain entering side and the chain leaving side differ, and the radius R1 of an arc of the tooth gap bottom, the radius R2 of the chain entering side tooth flank and the radius R3 of the chain entering side tooth head portion satisfy the relationships 0.505D≦R1≦0.505D+0.069{cube root}D, P−(0.505D+0.069{cube root}D)≦R2≦P−0.505{cube root}D, and 0.08≦R3≦0.13P. The transmission chain exhibits improved endurance and quietness, smooth operation, and resistance to elongation due to wear.

Abstract: In a roller chain transmission, the diameter D of the rollers, the outer diameter d of the pins, and the height H of the inner plates satisfy the relationships 0.72P≦D≦0.79P, 0.40P≦d ≦0.44P, and 0.96P≦H , with respect to the chain pitch P. The radius r of the arc of the tooth gap bottom of the sprocket teeth satisfies the relationship 0.505D≦r≦0.505D+0.069{cube root}{square root over ( )}D. The transmission chain exhibits high durability due to improved strength and wear resistance under high loads.