Simplex Roller Chain Pitch Average Breaking load : 3009 Kgs. MR 20 As per D1N-8187(BSS). NO Connecting link Suitable For Above 3Zt Pitch. MR Simplex Roller Chain 2” Pitch Average Bearing Load:2652O Kgs. As per DIN-818?(BSS). Connecting link Suitable for above 2" Pitc (EXPIRED)