Causes of chain pulsation, jerking, and abnormal wear

• 1) Overload, glass fragments or jammed crown
• 2) Chain waviness on return-way
• 3) Insufficient or no lubrication
• 4) Interference between top plates
• 5) Sprocket wear
• 6) Irregular chain wear or breakage

Lubrication significantly reduces chain elongation, sprocket wear, and top plate and rail wear.

The use of lubricants also reduces noise and power loss during transport.

Plastic chains are self-lubricating, but lubrication can provide similar benefits.

In this case, the most desirable thing is to use a good quality lubricant, but when oil cannot be used, special lubricants or soap are often used.

Be sure to apply sufficient amounts of these lubricants to the areas where wear occurs as described above.

During normal use, chain Wear debris, grease, dust, spilled syrups, and other contaminants can easily accumulate on the chain, making it necessary to clean the chain and conveyor, resulting in the following undesirable consequences:

• 1) Contamination, scratches, falling, and slippage of transported items
• 2) Increased load on the chain and motor
• 3) Accelerates wear of sprocket teeth
• 4) Pulsation or jerking of the conveyor
• 5) Accelerates wear on the top plate and bends of the chain
• 6) wearstrip wear out quickly
• 7) Increase in bacteria and germs

*When Top chain is operated, wear debris is generated.
This can occur frequently, especially during the initial settling period, so please clean regularly.

How to secure a sprocket for Plastic top chain

Place the set collars on both sides of the sprocket without any gaps, and then tighten the bolts to the required torque to secure them in place.

How to fix the idler

Place the set collars on both sides of the idler and tighten the bolts to the required torque to secure them in place.

At that time, make sure there is a gap and the idler rotates.

Please refer to the set color for details.

5-1. Chain

item	Inspection method	Judgment criteria(※)
Chain wear elongation	To eliminate play in the entire chain With the chain tensioned to some extent Measure the length of the 10 top plates with a tape measure.	judgement Chain elongation rate X A 0 ≦ X < +1.2% B +1.2% ≦ X < +2.6% C +2.6% ≦ X Elongation rate X = (measured length - reference length) ÷ reference length × 100 Reference length = chain pitch x 10 Example: Measurement results for 10 TTP type links (reference length 381 mm) Elongation rate and judgment when the measurement length was 387 mm Growth rate X = (387 - 381) ÷ 381 × 100 ≒ 1.6% Based on the table above, the rating is B.
Top plate wear (Plastic top chain Stainless steel Top chain only)	The thickness of the top plate that slides against wearstrip is Measure with a vernier caliper. In addition, if the conveying surface has unevenness of 1 mm or more Please check if this is occurring.	judgement Thickness t mm Made of engineering plastic (Plate thickness 4mm) Steel (Plate thickness 3.2mm) A 4.0 ≧ t > 3.4 3.2 ≧ t > 2.7 B 3.4 ≧ t > 2.4 2.7 ≧ t > 1.9 C 2.4 ≧ t 1.9 ≧ t
Link height wear (plastic Modular Chain)	The height of the link that slides with wearstrip or transported object is Measure with a vernier caliper.	judgement Wear amount Y mm WT0405 WT0700 series BTC4-M WT1500/1900/2510 2250/2520/2700/3005 BT5/BT6/BT8 series A 0 ≦ Y < 0.2 0 ≦ Y < 0.4 0 ≦ Y < 0.6 B 0.2 ≦ Y < 0.5 0.4 ≦ Y < 0.7 0.6 ≦ Y < 1.0 C 0.5 ≦ Y 0.7 ≦ Y 1.0 ≦ Y judgement Wear amount Y mm WT2500 Series WTU3015・WT3827 WT3835, BTM8H, BTC8H WT3109 WT3816 WT5707 BTH16 A 0 ≦ Y < 0.9 0 ≦ Y < 1.4 0 ≦ Y < 1.8 B 0.9 ≦ Y < 1.6 1.4 ≦ Y < 2.4 1.8 ≦ Y < 3.0 C 1.6 ≦ Y 2.4 ≦ Y 3.0 ≦ Y Wear amount Y = Reference link height (catalog value) - Measurement height: t
Link height wear (Plastic block chain)	The height of the link that slides with wearstrip or transported object is Measure with a vernier caliper.	judgement Wear amount Y mm RSP35 RSP40・50 RSP-P08 RSP60 RSP-P012 RSP80 A 0 ≦ Y < 0.7 0 ≦ Y < 1.2 0 ≦ Y < 1.6 0 ≦ Y < 2.3 B 0.7 ≦ Y < 1.2 1.2 ≦ Y < 2.0 1.6 ≦ Y < 2.7 2.3 ≦ Y < 3.9 C 1.2 ≦ Y 2.0 ≦ Y 2.7 ≦ Y 3.9 ≦ Y Wear amount Y = Reference link height (catalog value) - Measurement height: t
corrosion	Check whether the chain has any poor bending due to corrosion. If corrosion is progressing, remove the rust and Measure the thickness of the link plate with a vernier caliper.	judgement standard A To the extent that it is shallowly scattered. B There is rust all over. C It has progressed so deeply that it is affecting the plate thickness.
Top plate deformation	Damaged bottles, caps, etc. Deformation of the top plate, lifting of the curled part, The play between the top plate and the rivets, and the top surface of the top plate Check for any abnormal scratches.	Please replace it if it is deemed to be interfering with transportation. Regarding abnormal scratches on the top surface of the top plate Please investigate the cause of return-way rail etc. and repair it.
Roller chipping, and poor rotation	Check for missing rollers and roller rotation.	If there are any missing rollers, rollers that are not rotating properly, or rollers that are heavily worn on one side, Replace the chain and rollers.

(※) A: Can continue to be used. B: There is still some margin for improvement up to the limit of use, but preparations for replacement should be considered. C: Replacing the product is necessary after reaching the limit of use.

Note: Please contact us for the standards for link height wear of the TPUN type.

5-2. Sprocket

When the sprocket wears down as shown in the diagram on the right (left), the chain gets caught on the tip of the teeth A, making it difficult to release, causing the chain to vibrate.

The amount of wear tolerance varies slightly depending on the conveyor type and chain size, but if you replace the chain when it has worn down to about 1.5 to 2 mm, it will not damage the chain.

Also, if the sprocket is worn in the tooth width direction as shown in the diagram on the right (right), the shaft centering is incorrect and should be corrected.

5-3.Running wearstrip

Replace wearstrip when it has worn down to half its original thickness.