Conveyor, Bucket Elevator, and Tension Linkage Chains

LUBRICATION OF CONVEYOR, BUCKET ELEVATOR, AND TENSION LINKAGE CHAINS 

It is often difQcult to lubricate chains used in conveyors, bucket elevators, and tension linkages. They normally cannot be enclosed in a chain casing or protective housing. They have to work in the open and they are exposed to spillage of the product being carried. 

In most cases, oil is recommended as a lubricant for conveyor chains. The same oil that is recommended for drive chains, at the same temperature ranges, can be used for conveyor chains. Grease may be used only if it is injected into the joint through lubrication fittings on the pins. 

Manual or drip lubrication is often used for chains that work in a relatively clean atmosphere. The methods of applying lubricant are the same as for drive chains. In manual lubrication, oil is apphed with a brush or spout can. In drip lubrication, oil is constantly dripped on the chain. In both cases, the oil should be apphed to the upper edges of the link plates or sidebars. 

Some conveyor chains have to work in dusty or abrasive conditions. The abrasive then mixes with the oil and forms a slurry that makes the chain wear faster. Even so, conveyor chains that run in abrasive conditions should be lubricated. A chain running in abrasives usually wears faster without lubrication than with it. Wiping the abrasive off the chain with a cloth or brush before applying the oil can extend chain life. Clearing debris off the chain can be automated when drip-type oihng is used. Rotating cleaning wheels or brushes can be mounted just ahead of the drip oiler to clear the debris off the chain. 

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