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Technical Data Installation, Lubrication and Maintenance Information In both the oil bath and slinger disc lubrication methods the temperature of the oil and chain should not exceed 180 F (82 C) The volume of oil applied to the chain should be suf cient to prevent discoloration. After each 8 hours of operation the oil levels in both the oil bath and slinger disc should be checked and lled as required. In addition, the lubrication system should be checked for leaks, foaming, and overheating. Oil Stream or Pressure Spray Lubrication (Type C) An oil pump delivers oil under pressure, through a exible hose, to nozzles, which direct a stream or spray onto the chain. The oil should be delivered evenly across the entire chain width on the inside of the slack portion of the chain strand. Excess oil collects in the bottom of the casing and is returned to the pumps reservoir. Cooling may be accomplished by heat dissipation through the casing or by a heat exchanger. As with the oil bath and slinger disc methods oil levels should be checked every 8 hours and lled as required. The system should be checked for leaks, foaming and overheating. Drive Chain Maintenance In order to obtain maximum service life a maintenance plan should be established which assures the following: 1. 2. 3. 4. 5. 6. The drive is properly lubricated. Damaged or worn out chains, sprockets, bearings etc. are replaced. Sprockets and shafts are properly aligned. Chains are correctly tensioned. Any interferences are eliminated. Appropriate guarding is in place and properly installed. Roller chains should be inspected after the rst 50 hours of operation for the following: 1. 2. 3. 4. 5. Damage to chains and sprockets. Excessive chain or sprocket wear. Interferences. Lubrication system. Proper chain tension (adjust if necessary). Chain Wear In most roller chain drive applications the chain is considered worn out when it has elongated by 3%. Since elongation is caused by pin/bushing wear these components are weakened by wear. In addition as the chain gets longer it may not operate over the sprocket correctly. On drives with more than 68 teeth on the largest sprocket use the following formula to determine the maximum permissible chain elongation: 200 / N [%] N = Number of teeth on the large sprocket. Oil Stream or Pressure Spray Lubrication Method Dividing the number of teeth of the large sprocket into 200 gives the allowable elongation as a percentage. For example if the number of teeth on the large sprocket is 100 . . . The allowable elongation is 200 / 100 = 2%. The table below gives the required oil ow necessary in oil stream or pressure spray lubricators according to the horsepower transmitted by the drive. Transmitte d Powe r Minimum Oil Re quire d HP KW gal/min lite r/min 50 37 0.25 100 75 150 Transmitte d Powe r Minimum Oil Re quire d HP KW gal/min lite r/min 0.95 500 373 2.50 9.46 0.50 1.89 600 447 3.00 11.40 112 0.75 2.84 800 597 3.75 14.20 200 149 1.00 3.78 1,000 746 4.75 18.00 300 224 1.50 5.68 1,500 1,119 7.00 26.50 400 298 2.00 7.57 2,000 1,491 10.00 37.90 When measuring the length of a chain use a pair of calipers and measure over at least 8 pitches on the tight side of the strand. Sprocket Tooth Wear The following may indicate that sprocket teeth are worn out and that the sprocket should be replaced: 1. 2. 3. Teeth are hooked. Tooth thickness is reduced by 10%. Binding or clinging when a new chain engages or disengages the tooth. 137