Hitachi

Technical Data Installation, Lubrication and Maintenance Information Methods of Application for Lubricants In the horsepower tables three type of lubricant application methods are included as part of the chains capacity as follows: Type A: Manual or Drip Lubrication Type B: Oil Bath or Slinger Disc Lubrication Type C: Oil Stream or Pressure Spray Lubrication Oil Bath Lubrication (Type B) A short section of chain runs through an oil sump at the bottom of the chain casing. The level of oil should reach the pitch line of the chain at its lowest point of operation. Horizontal or nearly horizontal drives which require long sections of chain to be run through the bath, are not ideal candidates for this method of lubrication. Oil foaming and/or overheating of the oil can result when long sections of chain run through the bath. This means that the chain is rated at a certain horsepower capacity provided the lubrication method recommendation is followed. If these recommendations are ignored chain life can be severely reduced. Manual Lubrication (Type A) IMPORTANT: Manual lubrication is to be applied only when the chain drive is stopped and power is locked out. Oil is applied periodically with a brush or oil spout can. Lubrication once every eight hours of operation is suggested but sometimes this period is extended. The amount of oil and the frequency it is applied should be suf cient to prevent a red rust discoloration of the oil. The discoloration suggests that additional oil applied more frequently is required. If this occurs the chain should be cleaned, re-lubricated and reinstalled prior to further use. Drip Lubrication (Type A) Oil is dripped between the link plates and between the roller and the roller link plates at some regular rate from a drip lubricator. Drip rates range from 4 - 20 drips per minute depending on chain speed. As with manual lubrication, the rate at which oil is applied should be suf cient to prevent red rust discoloration of the oil. Care should be taken to prevent windage from misdirecting the drops. Also the oil levels should be checked periodically to assure that the reservoir is not dry. Oil Bath Lubrication Method Slinger Disc Lubrication (Type B) The chain operates above the oil in a slinger disc lubricator. A disc, mounted to the shaft dips into the oil and slings it at a collector plate. The oil runs into a trough (or gutter) and is distributed to the chain. The diameter of the disc should be sized to produce linear speeds at the rim of between 600 ft/min. and 800 ft/min. Lower speeds may not effectively pick up the oil and higher speeds may cause overheating and foaming of the oil. Multiple strand chains require a distribution pipe which can feed oil to all the rows of link plates. A wick packed distribution pipe is often required for this purpose as illustrated below. Slinger Disc Lubrication Method 136

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