398 TECHNICAL INFORMATION Installation Way (A) Arrangement of Shafts Horizontal Arrangement Even when the shafts are arranged horizontally, the following points should be taken into account in terms of the rotary direction of the shafts. In (2) and (3) shown, elongation of the chain may prevent the chain links from leaving the sprocket teeth smoothly, resulting in biting. Especially for (3), use an idler, etc., because the upper side and lower side of chain are the most likely to come into contact with each other. (Change the rotating direction or use an idler) Horizontal Arrangement Vertical Arrangement If a chain is elongated, it is deflected as shown in (5). In this case, if the smaller sprocket is arranged below the larger sprocket, the chain will come off. Therefore, restrict the vertical installation angle of chain to 60° or less. When the mechanism in question or the installation space requires a vertical arrangement, place the small sprocket above the large sprocket and use an idler, etc. on the outside or inside as shown in (6) . Vertical Arrangement (B) Deflection The deflection should normally be maintained at approximately 4% of the distance between the shafts, and approximately 2% in the following instances. A. The shafts are arranged almost for vertical transmission. B. The distance between the shafts is 1 m or more. C. The chain needs to be started and stopped frequently under heavy load. D. The chain needs to be run in the reverse direction. (C) Load Fluctuation When the load varies during operation, apply an appropriate initial tension either on the load or loose side of the chain. This can remove vibration and reduce the noise of the chain. Lubrication The service life of roller chains depends heavily on lubrication. Therefore, correct lubrication is extremely important. Today, as chains are increasingly run at higher speeds, they need to be lubricated more efficiently. Benefits of Lubrication Oil Oil applied into the space between pins, bushings and rollers forms oil film. That helps reduce wear of parts as well as absorbing impact. Oil also cools down heat generated in the chain. Use good quality mineral oil to lubricate roller chains. Recommended Lubricating Oil Lubrication methods (mentioned in the power transmission efficiency tables are based on the followings.) Lubrication Method Service Interval and Oiling Quantity Notes A Hand Oiling Apply oil by hand using a hand oiler or a brush, normally at least once everyday. While slowly turning the chain, apply oil evenly 3~4 times onto the entire length of the chain. Be careful not to allow hands or clothing to be caught between the chain and the sprocket. When the mechanism is run for the first time after oiling, be careful about excess oil splashing over. Drop Lubrication Oil the chain in such a way that approximately 5~20 drops of oil are applied onto the chain per minute. It is recommended that a simple casing be installed over the chain to prevent oil from splashing over. B Oil Bath Lubrication Dip the bottom of the chain approximately 10 mm below the oiled surface. Use a leak-free oil container. Before installing the oil container, wash it carefully to remove dust, dirt and other foreign particles. Maintain the correct oil level. Do not overfill the container. Rotating Plate Lubrication The chain is oiled by a rotating plate. Dip the plate approximately 20mm below the oil surface. The wind velocity of the plate should be 200 m/min or faster. C Forced Circulation Lubrication by Pump It is necessary to adjust the oil quantity appropriately to prevent overheating. Use a leak-free oil container. Before installing the oil container, wash it carefully to remove dust, dirt and other foreign particles. Lubrication Method A , B C Temperature( ) Chain No. -10 ~ 0 0 ~ 40 40 ~ 50 50 ~ 60 -10 ~ 0 0 ~ 40 40 ~ 50 50 ~ 60 CHE25~50 SAE10 SAE20 SAE30 SAE40 SAE10 SAE20 SAE30 SAE40 CHE60~80 SAE20 SAE30 SAE40 SAE50 Oil Pump Driving Side Driving Side Driving Side (1)Good (2)Not Good (3)Not Good L L×4% Tensioner Tensioner Leaf Spring Rubber Tensioner (Ex. 1) Tensioner (Ex. 2) Tensioner(Ex.) 60° (4) Good (5) Not Good (6) Good Idlers Driving Side
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