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Double Pitch Roller Chains Double Pitch Roller Chains - General Information Double Pitch roller chains are produced in accordance with the ASME/ANSI B29.3 (Transmission Series) and B29.4 (Conveyor Series) American roller chain standards. In general, these chains are dimensionally similar to ASME/ANSI standard products except that the pitch is double. They are available in the Transmission Series, Conveyor Series with standard sized roller, and Conveyor Series with large (oversized) roller. Transmission Series The Transmission Series is often used on drives with slow to moderate speeds, low chain loads and/or long center distances. Side plates have a " gure-8" contour. The chain number is obtained by adding 2000 to the chain number and an "A" pre x. For example; Double Pitch Transmission Series #40 is A2040, #50 is A2050 etc. Some manufacturers do not use the "A" pre x and denote the chains as 2040, 2050, etc. Conveyor Series with Standard Roller The Conveyor Series with Standard Roller is often used for light to moderate conveyor applications with or without attachments. These chains have straight side plates for improved sliding properties. Pitch sizes of 1 1/2" and higher have "Heavy Series" link plates . The chain number is found by adding 2000 to the chain number and a "C" pre x. Heavy style chains have an "H" suf x. For example; Double Pitch Conveyor Series #50 roller chain with a standard sized roller is C2050, #60 is C2060H because the pitch of C2060H is 2 times .75" (#60) which is 1 1/2". Conveyor Series with Large Roller Large rollers allow for rolling action which reduces friction. The chain number is found in the same way as above except that a "2" is added (C2042, C2102H, etc.). Sprockets should be produced specially for these chains according to the B29.3 or B29.4 ASME/ANSI standards. It is however possible to use standard ASME/ANSI B29.1 sprockets for the Transmission Series and Conveyor Series with Standard Roller if the actual number of teeth is 30 or more. Transmission Series Double Pitch Roller Chains Transmission Series Speci cations Chain Dime nsions Are Give n In Inche s Chain Numbe r Inside Width W Rolle r Diame te r R Pin Diame te r D Link Plate Thickne ss T Link Plate He ight H A2040 1.000 0.312 0.312 0.156 0.060 A2050 1.250 0.375 0.400 0.200 0.080 A2060 1.500 0.500 0.469 0.234 A2080 50 Chain Pitch P 2.000 0.625 0.625 0.312 Rate d Working Load (Lbs) Ave rage Ultimate Stre ngth (Lbs) Ave rage Chain We ight (Lbs/Ft) 0.406 800 4,300 0.29 0.465 1,400 7,200 0.49 1,900 9,700 0.69 3,300 17,600 1.15 Riv. Pin Le ngth Lr Cot. Pin Le ngth Lc 0.450 0.323 0.591 0.402 0.094 0.670 0.500 0.583 0.125 0.890 0.638 0.740

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