Double Pitch roller chains are generated in accordance with the ASME/ANSI B29.3 (Transmission Series) and B29.4 (Conveyor Series) American roller chain standards. Normally these chains are very similar to ASME/ANSI typical items except that the pitch is double. They are obtainable in Transmission Series, Conveyor Series with Standard (small) Rollers and Conveyor Series with Huge (oversized) Rollers.
Transmission Series
This series is often used on drives with slow to moderate speeds, lower chain loads and prolonged center distances. Side plates have a fi gure ?¡ã8?¡À contour. The chain quantity is obtained by incorporating 2000 towards the ASME/ANSI chain amount and also the prefi x letter ?¡ãA?¡À. Note that some firms do not use a prefi x letter for this series so the chains may possibly be represented as A2040, A2050 etc. or 2040, 2050 etc.
Conveyor Series with Standard (tiny) Rollers
This series is often utilised on light to moderate load material dealing with conveyors with or with no attachment backlinks. The side plate contour is straight for improved sliding properties. Pitch sizes of 1-1/2?¡À and bigger have ?¡ãHeavy?¡À series hyperlink plates (i.e. hyperlink plates with the next larger chain 
dimension. The chain amount is discovered by including 2000 on the ASME/ANSI chain variety plus the prefi x letter ?¡ãC?¡À. Chains using the ?¡ãheavy?¡À kind side plates use a suffi x letter ?¡ãH?¡À.
Conveyor Series with Big (oversized) Rollers
These chains possess big rollers to ensure that the chain rolls on a conveyor track reducing friction. Chain numbers are discovered while in the same way as noted above except that the last digit on the chain amount is changed from ?¡ã0?¡À to ?¡ã2?¡À which denotes the substantial roller.
Sprockets
On the whole sprockets needs to be produced specially for these chains in accordance towards the ASME/ANSI B29.3 and B29.4 requirements nevertheless, for Transmission Series and Conveyor Series with Regular (small) Rollers, ASME/ANSI B29.1 Common roller chain sprockets may well be made use of offered the quantity of teeth is thirty or extra.
