DRIVE CHAINS - Tsubaki

T S U B A K I D R I V E C H A I NRoller Chain ConstructionBefore Use For Safe UseStandard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling1. Basic Structure (Photo: RS Roller Chain)Offset pinBasic Three DimensionsThe pitch, roller diameter, andinner width of the inner linkare considered the basic threedimensions of a roller chain.When these dimensions areidentical, a roller chain andsprocket are dimensionallycompatible.Cotter pinSpring clips, cotter pins andspring pins are essential partsthat prevent connecting platesfrom falling off, maintainingthe strength of the chain itself.Always install these parts.*Slip FitWhen the shafts and holes arefitted together, there is acontinuous loose fit. This is afit where the range of tolerancefor the hole is larger than therange of tolerance for the shaft(pin or bush).*Press FitWhen the shafts and holes arefitted together, there is acontinuous interferential fit. Thisis a fit where the range oftolerance for the hole is smallerthan the range of tolerance forthe shaft (pin or bush).Slip fitPlateOuter linkRollerdiameterOffset linkInner linkPitchConnecting linkChainWidth between inner link platesThe plate bears the tension placed on the chain. Usually this is a repetitive load, butsometimes it is accompanied by shock. Therefore, the plate must have not only great statictensile strength, but also must hold up to the dynamic forces of load and shock.PinPress fitPress fit*2Press fitSlip fit*1The pin is subject to shearing and bending forces transmitted by the plate. At the same time, itforms a load-bearing part, together with the bush, when the chain flexes during sprocketengagement. Therefore, the pin needs high tensile and shear strength, resistance to bending,and sufficient endurance against shock and wear.BushPinRollerBushConnecting link plateSpring clipInner linkInner plateOuter plateMiddle plateSingle-strandouter linkMulti-strand outer link(Double-strand shown here)chainThe bush is subject to complex forces from all parts, especially from the repetition of shockloads when the chain engages the sprocket. Therefore, the bush needs extremely high shockresistance. In addition, the bush forms a load-bearing part together with the pin, and as suchrequires great wear resistance.RollerThe roller is subject to impact load as it strikes the sprocket teeth during chain engagementwith the sprocket. After engagement, the roller changes its point of contact and balance. It isheld between the sprocket teeth and bush, and moves on the tooth face while receiving acompression load. Therefore, it must be resistant to wear and still have strength againstshock, fatigue and compression. RS11 / 15 / 25 / 35 do not have rollers.Roller LinkTwo bushes are press fit into two inner plates, and rollers are inserted to allow rotation aroundthe outside of the bush. This is the same for single-strand and multi-strand chain.Outer Link and Middle PlateThe pin link consists of two pins that have been press fit into two outer plates. With multistrandroller chain, a middle plate is added to the pin link. The middle plate is slip fit forStandard RS Roller Chain and press fit for SUPER Roller Chain.11