In 16 century, Leonard Davinchi introduced concept of steel chain in his sketch. French engineer materialized his idea on 1832 as Galﾕs bicycle chain. Hans Renold developed current popular steel roller chain in 1880. The following information is required to select the chain; Power to be transmitted (kw) Driving shaft and driven shaft speed and shaft diameters. Center distance between driving shaft and driven shaft. Power transmission chain: Under 150m per minute. Small pitch conveyor chain: 10-30m per minute. Large pitch conveyor chain: 10-30m per minute. Precision conveyor chain: Under 50m per minute. Top chain: 5-10m per minute. Periodical inspection (at least once a month. Increase inspection for sever application) Inspection under operation (abnormal noise, vibration, chain stiffness, sprocket engagement, lubrication) Inspection after operation (condition of connecting link, clip and cotter pin, chain slack, parts deformation or excess wear, etc.) Main purpose is to reduce friction between chain pin and bushing and extend chain life. Cooling, sealing and rust prevention.   -10°C - 0°C 0°C - 40°C 40°C - 50°C 50°C - 60°C Under #50 chain SAE10W SAE20 SAE30 SAE40 #60- #80 chain SAE20 SAE30 SAE40 SAE50 #100 chain SAE20 SAE30 SAE40 SAE50 #120 chain SAE30 SAE40 SAE50 SAE50 The lubrication oil must be applied before this happens. Do not use grease to lubricate your chain, since it takers a too long for grease to reach the clearances between pins and bushing s at room temperature. Chain is excessively tensioned or slackened. Incorrect alignment of sprockets Improper lubrication. Chain is too slack Uneven wear elongation SUS 300 series: Better viscously because of higher Nickel contents. Excellent anti-corrosion performance. Less wear and strength performance. SUS 430 series: Economical. Less anti-corrosion performance than SUS300 series. SUS 403 series: Increase hardness by heat treatment. Less anti-corrosion performance because carbon contains. Better wear resistance and strength performance. SUS 600 series: Best strength performance. Better wear resistance and anti-corrosion performance than SUS304 series.   Steel chain SUS 300 series SUS 600 Tensile strength 1 0.7 0.7 Wear resistance 1 0.5 0.5 Working load 1 0.15 0.25 Anti- corrosion NG Best Better The following information is required; Chain number and number of strands Type of sprockets Shaft hole diameter Number of teeth Boss diameter and length Whether the tooth heads are hardened In general, sprocket life is several times longer than chain life. However if the teeth are worn because of insufficient lubrication or damaged due to a shock load, the sprockets must be replaced immediately.