DRIVE CHAINS - Tsubaki

Before Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling1. 1 How to cut Lambda Chain1)2)3)Support the chain with a chain vice and grind down oneend of the outer link plate's two pins (same side) to thesurface of the link plate. Be careful of the chainoverheating during the grinding process. Grindingshould be carried out slowly so as not to overheat thebushes in particular.Then cut the chain using an exclusive cradle (seeAccessories section) and an RS Roller Chain punch.Important points for cutting are outlined in 4) and 5) in1.1. However, use an exclusive cradle instead of a vice.Hit the pins alternatively when removing the pins with apunch. Take extra care not to remove or cause anydamage to the bush. Do not use bush if it has comeloose or been damaged.2. How to Connect Roller Chain2. 1 When connecting chain on sprocket teethWhen connecting or disconnecting roller chain, itis convenient to use the sprocket teeth. Pleasecarry out the following steps.1) Wind the chain around one of the sprockets so that bothends of the chain are facing each other on the sprocket.2) Insert the connecting link in the two end links of the chain.3) Insert the connecting link plate of the connecting link and fastenthe plate using the clips/cotter pins or spring pins provided.4) When using a press-fit connecting link or F-Type (semipress-fit) connecting link, insert the connecting link plateby tapping it with a hammer until it moves into position.Then fasten it usingthe clips/cotter pins orspring pins provided.5) When using the sprocketteeth to connect thechain, take care notto damage the teeth,particularly when usinga cast iron sprocket.Fig. 8 Connecting on a sprocket2. 2 When connecting between shaftsIf a sprocket cannot be used due to layout, followthe procedures below.1) Wind the chain around the sprockets and pull the chainends together using a chain puller (see Accessoriessection) or wire.2) Insert the connectinglink in the two endlinks of the chain.3) Insert the connectinglink plate of theconnecting link andfasten the plate usingthe clips/cotter pins orspring pins provided.Fig. 9 Connecting between shafts2. 3 Clip and Cotter Pins1) ClipClips are used for small size roller chain (underRS60) connecting links. When connecting the chain,the clip should be inserted securely into the slot ofthe pin on the connecting link after the connectingplate has been inserted on the pin. If the legs of theclips are spread too far they will not catch properlyand will fall off during operation of the chain, causingaccidents. Care should be takenwhen inserting them. The clip isgenerally installed opposite tothe direction of travel for thechain as shown in Fig. 10.Direction of travelFig. 10 Direction in whichthe clip is installed2) Cotter PinsTsubaki cotter pins are treated for Standard, Heavy-Duty,and Lambda Chain. The legs of the cotter pin should bebent approx. 60 degrees. Cotter pins should not bereused, and commercially available cotter pins otherthan those produced by Tsubaki should be avoided.Cotter pinFig. 11 Opening range of pinsRS Roller Chain cotter pin dimensions (These pins are not available commercially.)Chain size Nominal cotter pin dimension Chain size Nominal cotter pin dimensionRS35 1 6 RS100 2.520RS40 1 6 RS120 3 23RS50 1.6 8 RS140RS160 4 24.5RS60 2 10 RS180 5 32RS80 2.514 RS200 5 37Note: RS240 uses a roll pin.Safety PrecautionsT-pinZ-pinAvoid using offset links wherever possible byvarying the center distance between shafts orusing an idler.In the case of pins and connecting link plate holesbeing press-fit type with F-Type or other connectinglinks, please avoid widening the connecting linkplate hole or narrowing the pin diameter to makeconnecting easier, as this will result in a reductionin roller chain strength and cause an accident.The outer link of cotter pin type roller chain canbe used as a substitute for the connecting link.However, due to the press fit connection, theouter link plate must be carefully driven ontothe pin parallel to the connecting link. If theconnecting link plate is installed without duecare to parallelism, chain damage or increasedwear may result. Use caution as per (2) above.Donot reuse press fit type link plates that havebeen detached, as the detachment results in areduction in strength.159