Page 37 of Roller Conveyor Chains by U.S. Tsubaki

engineering chain division maintenance checkpoints checkpoints centering comments a guide rail is essential to ensure proper centering of the conveyor if centering is not accurate with no side guide rail scrubbing of the sidebars will occur which results in shorter conveyor chain life and/or possible chain failure when two or more sprockets are installed in a row be sure to align the position of the sprocket teeth if the sprocket teeth are not properly aligned the working load will not be equally divided and will cause the chain to twist to align sprockets quickly easily and effectively contact u.s tsubaki for information about the pro-aligntm laser alignment system if take-ups on both sides are uneven the conveyor chain will not engage smoothly with the sprocket maintain adequate chain slack if chain tension is too high loss of power will result this is a dangerous situation and if too loose the chain will climb the sprocket the first running of the system after installation should be made under no-load conditions run the system through several cycles while listening for noises which may indicate obstructions and/or problems within the system after inspection continuous operation may begin stop the conveyor under no-load conditions to prevent remaining material from overloading the system when the conveyor starts again lubricate conveyor chain periodically lubrication of reducers bearings and other components is also essential parts fastened to the conveyor such as buckets aprons slats etc may loosen due to vibration fasten nuts and bolts securely and check periodically chain slack varies per application regularly check and adjust the amount of chain slack based on visual inspection during actual run and downtime consult troubleshooting guide when required after installing the conveyor prepare a record of the expected capacity to be conveyed conveyor speed r.p.m of main shaft electric current voltage working horsepower actual conveying capacity inspection date lubricating date details of troubles etc this record will serve as protection against unexpected problems and will be helpful during maintenance and repairs sprocket alignment take-up initial chain tension break-in stopping conveyor lubrication securing conveyor parts amount of chain slack use and maintenance record warning use care to prevent injury comply with following to avoid serious personal injury 1 guards must be provided on all chain and sprocket installations in accordance with provisions of ansi/asme b15.1 2000 safety standards for mechanical power transmission apparatus and ansi/asme b20.1 2000 safety standards for conveyors and related equipment or other applicable safety standards when revisions of these standards are published the updated edition shall apply 2 always lock out the power switch before installing removing lubricating or servicing a chain system 3 when connecting or disconnecting chain a eye protection is required wear safety glasses protective clothing gloves and safety shoes b support the chain to prevent uncontrolled movement of chain and parts c use of pressing equipment is suggested tools must be in good condition and properly used d do not attempt to connect or disconnect chain unless you understand chain construction including the correct direction for pin/rivet removal or insertion e do not attempt to rework damaged chains by replacing only the components obviously faulty the entire chain may be compromised and it should be discarded 4 other cautions a alterations and repairs to chains should be made only by qualified personnel with parts and components authorized by u.s tsubaki b electroplating of assembled chains is not condoned plating of assembled chains could result in failure from hydrogen embrittlement c inspect chains for shipment damage before installation during operation all chain systems should be inspected on a regular schedule visually check for worn damaged and broken parts caused by improper installation or maintenance abnormal stress temperature humidity abrasion or corrosion possible interference with other system components and improper lubrication for correct lubrication procedures and systems see the engineering section d heating chain with a cutting torch is not suggested unless absolutely necessary for removal if cut in such a manner it should not be reused e welding should not be performed on any chain or component f average ultimate strength of a chain means the average load at which it will break when subjected to a destructive tensile test it does not mean working load for complete information contact u.s tsubaki engineering g product dimensions in this catalog are subject to changes and are intended for general reference only for exact current dimensions request certified prints from u.s tsubaki 36

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