Roller Chain - Tsubaki

Introduction toTsubaki Roller ChainPower transmission machines use chains, gears, or belts. The table below provides a comparison of typical applications. In general,chain is an economical part of power transmission machines for low speeds and large loads. However, it is also possible to use chainin high-speed conditions like automobile engine camshaft drives. This is accomplished by devising a method of operation and lubrication.Drive ChainGeneral Comparison ofTransmission ElementsSynchronizationTransmissionEfficiencyAnti-ShockRoller Chain Tooth Belt V Belt■■■ ■ ▲▲ ❍ ■▲Spur Gear■■▼Noise/Vibration▲ ■ ■▼SurroundingConditionsAvoid water and dust(Corrosion ResistantRoller Chain is available)Avoid heat, oil,water, and dustAvoid heat, oil,water, and dustAvoid water anddustSpaceWeightHigh SpeedLow LoadLow SpeedHigh LoadLubrication▼ ■ ❍■Compact/Light Weight▲Slightly heavy pulley▼Heavy wide pulley▼ Necessary ■ Unnecessary ■ Unnecessary❍❍Less durability due to lownumber of engaging teeth▼ NecessaryLayout FlexibilityExcess Load onBearing■ ❍ ▲■ ❍ ▼▼■■ Excellent ❍ Good ▲ Fair ▼ PoorFeatures & Points toNote about Roller ChainTransmissionFeatures1. Accommodates large speed reductions/increases (Usually up to 1 : 7)2. Chain can accommodate long shaft center distances (normally less than 4 m), and ismore versatile.3. It is possible to use chain with multiple shafts or drives with both sides of the chain.4. Ease of installation and replacement (easy to cut and connect chains).5. Drive use is possible even when shafts are vertical, as long as the chain receivessupport in short distances between the shafts.6. Standardization of chains under the American National Standards Institute (ANSI), theInternational Standardization Organization (ISO), and the Japanese IndustrialStandards (JIS) allow ease of selection.7. The sprocket diameter for a chain system may be smaller than a belt pulley, whiletransmitting the same torque.8. Sprockets are subject to less wear than gears because sprockets distribute the loadingover their many teeth.9. There is high shock absorbency compared with gears.Points to Note1. Chain has a speed variation, called chordal action, which is caused by the polygonaleffect of the sprockets.(Shock can be reduced under the same speed ratio, by either reducing the chain pitchor increasing the number of sprocket teeth.)2. During transmission, a particular method of lubrication is necessary according to speed.3. Chain wears and elongates, so you need to consider measures for adjusting chainslack.4. Chain is weak when subjected to loads from the side. It needs proper alignment.A-4