DRIVE CHAINS - Tsubaki

T S U B A K I D R I V E C H A I NGeneral Comparison of Transmission ElementsThe following table compares roller chains to other power transmission mechanisms such astoothed belts, V-belts and gears. Generally speaking, roller chains are often used aseconomical power transmission suited to low speed and high loads. However, it is alsopossible to use chain in high-speed applications such as camshaft drives for automobiles.TransmissionMechanismSynchronicityTransmissionEfficiencyAnti-shockNoise & VibrationAmbient ConditionsSpaceWeightHigh speed,light loadLow speed,heavy loadLubricationLayout FreedomExcess Loadon ShaftRoller Chain Avoid water and dust.(Corrosion-resistantdrive chains available.)Compact,lightweightAvoid heat, oil,water and dust.Avoid heat, oil,water and dust. Slightly heavypulleysRequiredExcellentGoodFairPoorFeatures and Precautions of Roller Chain Transmissions1.2.3.4.5.6.7.8.9.1.2.3.4.FeaturesWide with heavypulleysAccommodetes large speed reductions/increases (usually up to 1:7).Chain can accommodate long shaft center distances (normally less than 4 m), and is more versatile.It is possible to use chain with multiple shafts or drives with both sides of the chain.Easy installation and replacement (easy to cut and connect chains).Drive use is possible even when shafts are vertical, as long as the chain receives support in shortdistances between the shafts.Standardization of chains under the American National Standards Institute (ANSI), the InternationalStandardization Organization (ISO), and the Japanese Industrial Standards (JIS) allow ease ofselection.The sprocket diameter for a chain system may be smaller than a belt pulley while transmitting thesame torque.Sprockets are subject to less wear than gears because sprockets distribute the load over their manyteeth.High shock absorbency compared with gears.PrecautionsToothed Belt V-belt GearNot requiredNot required Chain has speed variation, called chordal action, which is caused by the polygonal effect of thesprockets.(Shock can be reduced under the same speed ratio by either reducing the chain pitch orincreasing the number of sprocket teeth.)During transmission, a method of lubrication suitable to the chain’s speed is necessary.Chain wears and elongates. Measures for adjusting chain slack need to be considered.Chain is weak when subjected to loads from the side. It needs proper alignment.Avoid waterand dust.Needs high strengthdue to low numberof engaging teeth.RequiredBefore Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling8