Tsubaki Drive Chains - Tsubakimoto Chain - #9

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Accommodetes 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 short distances between the shafts. Standardization of chains under the American National Standards Institute (ANSI), the International Standardization Organization (ISO), and the Japanese Industrial Standards (JIS) allow ease of selection. The sprocket diameter for a chain system may be smaller than a belt pulley while transmitting the same torque. Sprockets are subject to less wear than gears because sprockets distribute the load over their many teeth. High shock absorbency compared with gears. Chain has speed variation, called chordal action, which is caused by the polygonal effect of the sprockets. (Shock can be reduced under the same speed ratio by either reducing the chain pitch or increasing 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. 8 T S U B A K I D R I V E C H A I N The following table compares roller chains to other power transmission mechanisms such as toothed belts, V-belts and gears. Generally speaking, roller chains are often used as economical power transmission suited to low speed and high loads. However, it is also possible to use chain in high-speed applications such as camshaft drives for automobiles. Transmission Mechanism Synchronicity �� Transmission Efficiency �� Anti-shock × Noise & Vibration × Ambient Conditions High speed, light load Low speed, heavy load Space Weight �ü �ü Lubrication Layout Freedom Excess Load on Shaft × Required × �� Roller Chain Avoid water and dust. (Corrosion-resistant drive chains available.) Compact, lightweight Slightly heavy pulleys Wide with heavy pulleys Avoid heat, oil, water and dust. Avoid heat, oil, water and dust. Needs high strength due to low number of engaging teeth. Avoid water and dust. �� �� × �� �� �¢ �¢ �ü �� �¢ �� �� × �� �ü �� �¢ × × Required �� Not required �� Not required �� �ü �¢ �� �ü × ��Excellent�@�üGood�@�¢Fair�@×Poor Toothed Belt V-belt Gear 1. 2. 3. 4. 5. 6. 7. 8. 9. 1. 2. 3. 4. Features Precautions Features and Precautions of Roller Chain Transmissions General Comparison of Transmission Elements Before Use For Safe Use Standard Roller Chains Lube-Free Roller Chains Heavy Duty Roller Chains Corrosion Resistant Roller Chains Specialty Roller Chains Accessories Selection Handling