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Maintenance for Roller Chain Drive

Maintenance for Roller Chain Drive

It’s very practical to illustrate the conventional maintenance of roller chain drive because of its wide application in industry. Better maintenance, less failure. In practice, only following some simple maintenance principals, we can easily save costs and make its service life longer, and then making the operation more efficient.

  1. Each sprocket in the driving system should have good coplanarity and the chain path should always be smooth.
  2. The sagging of chain loose side should be suitable and for the adjustable center distance level and angle drive, the sagging should be 1%~2% of the center distance. For conditions of vertical drive and under vibration load、reverse drive and dynamic brake ,the sagging should be smaller. It’s very important to check and adjust the loose side sagging frequently in the chain drive maintenance.
  3. Good lubrication is also very important. Whichever lubrication method you choose, the most important thing is to make the lubricating grease distribute evenly in each chain joint clearance. If not necessary, avoid selecting big viscosity heavy oil or lubricating grease since it will jam the clearances gone to joints friction surface with dust after a period of time. Periodically clean the roller chain and check its lubrication condition frequently. Disassembly the pin and bush, if necessary. If the friction surface is brown or dust color, it may be caused by insufficient lubrication.
  4. Chains and sprockets should be always in good condition.
  5. Frequently check the working surface of sprocket teeth ,adjust or replace it when it’s excessively worn.

Troubleshooting Instructions

Failure SymptomPossible CausesActions
Very noisy1.Unalignment of sprockets
2.Unsuitable loose side sagging
3.Bad lubrication
4.Chain box or bearing loose
5.Excessive wear of chain or sprocket
6.Wrong selection of chain type and too big
7.Too small number of sprocket teeth
1.Realignment of sprockets
2.Make suitable adjustment of chain loose side
3.Improve lubrication conditions
4.Fasten chain box or bearing
5.Replace worn chains or sprockets.
6.Reselect chain type and adopt smaller pitch
7.Add chain teeth number or redesign it
Chain jumps off from
sprocket teeth
1.Chain is very loose which makes the
sagging too big.
2.Excessive wear of chain or sprocket
3.Excessive overloading
1.Make suitable tensioning adjustment
2.Replace the chain or sprocket
3.Select high strength chain to avoid overloading
The chain can’t be taken
off from the sprocket.
1.Unalignment of sprocket
2.Excessive wear of sprocket
1.Realignment of sprocket
2.Replace it
Dead link of chain1.Unalignment of sprocket
2.With foreign bodies in chain joints
3.Bad lubrication
4.Too big load
5.The corrosion of chain
6.The interferences between plates or
1.Realignment of sprockets
2.Remove the foreign bodies of joints
3.Improve lubrication conditions
4.Reduce the load or adopt suitable chain
5.Choose anticorrosion chain
6.Check the interferences of chain
Roller cracked or deformed1.Too big chain pitch or too small
number of sprocket teeth
2.Sprocket teeth have foreign bodies.
3.The chain climbs onto sprocket teeth
too high.
4.Excessive chain impact load
1.Select small pitch chain or add sprocket teeth
2.Remove all the foreign bodies or replace chain
3.Replace the chain and make appropriate tensioning
4.Reduce the impact of chain
Pin rotates or plate
hole drawn long
1.Chain overloaded1.Eliminate the overloading causes or adopt
large specification chain
Pin broken or plate broken
along the hole connecting line direction
1.Excessive overloading1.Eliminate the overloading causes or adopt
large specification or higher strength chain;
if sprocket failure symptom found, replace it
Plates broken1.The load above chain dynamic
1.Selecting big pitch chain or reduce
dynamic load
Excessive side-wear of plates
or sprocket teeth
1.Sprocket not coplanar or ending beat
2.Bad bearing stiffness of sprocket
3.Severe twist of chain
1.Increase machining and installation precision
2.Increase bearing parts stiffness
3.Replace chain
Outer link outside rubbed1.Chain not tensioned and jump, then to hit
adjacent bodies
2.Chain box deformed or with foreign
bodies inside
1.Make appropriate chain tensioning
2.Eliminate chain box deformation and
remove foreign bodies
Pin worn or bush bonded with
1.Bad lubrication
2.Chain speed too high or chain overloaded
1.Supply suitable lubrication system
2.Lower the speed or reduce the load
Excessive wear of sprocket1.Bad lubrication
2.Inferior material of sprocket and insufficient
teeth surface hardness
1.Improve lubrication conditions
2.Improve sprocket material quality and its
teeth surface hardness
Locking parts such as spring
clip and cotter pin etc.
become loose.
1.Chain wobbling heavily
2.Knock with obstructions
3.Locking parts wrong installed
1.Make suitable tensioning or consider adding
supporting board for guide plate
2.Remove all obstructions
3.Improve the installation quality of locking parts

So, running inspection, daily inspection or regular inspection, cleaning the oil container and keeping the check of oil lubrication and following the guideline for replacement are the essential components that can add up to the total lifespan of the roller chain drive (cc600) while also giving optimum work. 
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