Genie 080837.0904.S is a Genie OEM replacement ansi #50 roller chain (ANSI #50 Open-Ended Roller Chain Strand). This variant has the following dimensions: 90 pitches x 0.625 in pitch = 56.25 in total length; roller dia 0.400 in; roller width 0.375 in; plate height 0.594 in; plate thickness 0.080 in; pin dia 0.200 in. Construction: Standard carbon steel roller chain; no plating indicated. For use with Genie heavy-duty commercial door operators and Genie chain-drive operators requiring ANSI #50 roller chain. Selecting the correct chain ANSI size, pitch count, and configuration (open-ended vs. loop) is critical for proper installation and operator function.
A: This chain is an open-ended strand cut to 90 pitches, giving a total length of 56.25 in (90 x 0.625 in). It is not an endless or loop chain and requires master links or connecting hardware for installation.
A: The part number suffix ending in 4 identifies this as an ANSI #50 chain, with a pitch of 0.625 in. Suffix ending in 2 in the 080837 series indicates ANSI #41 chain.
A: ANSI #50 roller chain has a rated tensile strength of approximately 4,480 lbf, making it suitable for heavy-duty commercial door operator applications with higher load requirements than #41 or smaller chains.
A: This variant is standard carbon steel with no special plating or finish called out in the 080837 series designation. Nickel-plated variants in the Genie lineup use different series numbers such as 108612 (#25) or 108623 (#35).
A: The 080837.0904.S is 90 pitches long at 56.25 in total. A comparable shorter variant is 080837.0694.S, which is 69 pitches long at 43.125 in, also in ANSI #50. Chain length selection depends on the specific door operator model and door height.
