#120-1 is ANSI B29.1 standard single-strand roller chain with a 38.1mm (1.5-inch) pitch, designed for heavy-load power transmission. Made of premium alloy steel with precise heat treatment, it delivers high tensile strength, outstanding wear resistance and stable fatigue performance.
All components are precision-machined with solid rollers and bushes for smooth meshing with sprockets, reducing friction and elongation during long-term operation. Pre-stretched before delivery to ensure dimensional consistency and long service life.
Widely applied in heavy machinery, large conveyors, mining equipment and industrial transmission systems. Custom lengths, stainless steel and heavy-duty versions are available to meet harsh working conditions.
ANSI #120-1 Roller Chains Dimension
Pitch (p): 38.1mm
Roller Diameter (d1): 22.23mm
Width between inner plates (b1): 25.22mm
Pin diameter (d2): 11.1mm
Pin length (L): 50.3mm
Pin length (Lc): 54.3mm
Inner plate depth (h2): 35.7mm
Plate thickness (T): 4.8mm
