DRIVE CHAINS - Tsubaki

Leaf ChainsConstructionLeaf chains are also commonly called balance chains. The mostbasic type of steel chain, they consist of just plates and pins.Conforming to JIS specifications and suitable for use in low-speedequipment, leaf chains are mainly used for lifting, counterweights,and motion drives.The plates are connected by pins and take the strain when load isapplied. Pins are press fitted to outer plates and riveted. However,a slip fit* is used with middle and inner plates and pins.The pins pass between the plates and have to withstand the bulk ofthe shear forces resulting when the chain is under tension andmove freely within the inner plate holes when the chain articulates.* Slip fitWhen a pin is fitted to a hole, some play is normally allowed. The tolerancerange of the hole diameter is larger than the tolerance range for the pin diameter.* Press fitWhen a pin is fitted to a hole, the pin is normally tight against the hole. Thetolerance range of the hole diameter is less than the tolerance range for the pindiameter.TypesAL Type External plate dimensions and thickness arethe same as for the outer plates of RS Roller Chain withthe same pitch, while the pin diameter is almost thesame.End linksMiddle plateConnecting plate (slip fit)Inner plate and pin (slip fit)Inner linkOuter plate and pin (press fit)Middle plate and pin (slip fit)Outer linkThere are two types of leaf chain: AL for light loads and BL for heavy loads. The dimensions and plateconfiguration for each is different.BL Type Plate width is the same as for the innerplates of RS Roller Chain of the same pitch. Platethickness is the same as for one pitch larger RS rollerchain, as is pin diameter.1. Connecting link 2. End linkOuter plate — pin(Press fit)Cotter pinMiddle plateCotter pinEnd pinEnd plate — pin(Press fit)End plateHole dimensions allow for slip fit of end pin.Middle plateAL Leaf Chain plate lacingBL Leaf Chain plate lacing3. Outer link 4. Inner linkPin-sashi(Chain pin and outer plate)(Press fit)Outer plate(Press fit)Inner plateBefore Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection HandlingNote: All four types require a slip fit between inner / middle plate holes and pins.114