English (UK) 
简体中文 🔧 I. Chain tension: loose jump chain, tight broken shaft, how in the world to adjust?
Ask yourself: How can chain tension be quantified? By feel or by data?
The answer is clear: you have to rely on precise measurements!The accepted standard in the industry is:
- sagging method: Press manually on the centre of the chain.Sag ≤ 2% of span(Example: 1 metre span sag ≤ 20mm)
- tensiometer method: Measured with specialised tools.Tension value = 1.5~2 times of chain weight(10kg chain requires 15~20kg pulling force)
- Golden error bandTension fluctuations exceeding ±5%: Stop immediately to adjust! Otherwise the motor load will soar 40%.
Adjustment of the practical three-step::
- Tensioner: Release the tensioning bolt at the end of the machine first to avoid damage to the chain links by hard pulling.
- segmentation: Each rotation of the bolt is ≤1/4 turn and the target value is approached gradually in 3 steps
- Locking Anti-Rebound: Tighten the locking mother and then manually coil the car for 3 turns to double check the amount of sagging.
⚠️ Second, the chain run: 90% failure stems from these three major culprits
Ask yourself: why are you still off track when you've clearly levelled the track?
The core conflict is here.::
|Type of runout|typical characteristic|root cause analysis|
|—————-|———————–|————————–|
| One-sided wear | Shining marks on the inside of the chain |Guideway leveling error＞0.5mm/m|
| Periodic serpentine | Each link swings left and rightSprocket mounted on different shafts(Deviation >0.1mm) |
| Feeder runout | Offset in carrier section onlyMaterial impact point off centre line|
Practice Corrective Mantra::
- "Run tight, not loose.": Whichever side of the chain is loose, it's off to the side.Tightening the offset side guide
- "Run high, not low.": Tilt angle deviation of the rollers > 1°?Reduce the height of the offset side rollers
- "Running back, not front.": When the drive sprockets are misaligned, theSetback offset side bearing housing
Case warningA factory sprocket bearing locking sleeve loosening, resulting in sprocket axial runout 3mm - chain half a month to wear through, production stoppage loss of more than 800,000 yuan!
🛠️ III. Preventing Problems Before They Happen: Lifetime Maintenance Strategies for Tensioning and Deflection Prevention
Three mandatory monthly check-ups::
- Chain elongation detection: Marking of 10 chain lengths.Elongation >3% Immediate replacement(Risk of chain jumping spikes after overrun)
- Sprocket nibble test: powdered reddish tansy on the tooth surfaces.Contact spot <80% need to be corrected(Otherwise, chain wear is accelerated)
- No-load noise monitoring::
- (onom.) clunk→ Sprocket misalignment
- drone→ Loose bracket bolts
- whine→Deficient food-grade lubricants
Lubrication Exclusion Zone Warning::
❌ Molybdenum disulphide grease (corrosion chain sleeve)
❌ Random spraying of motor oil (traps dust and increases wear)
✅High Temperature Chain Oil Spray: Spray 0.1 ml/section every 8 hours
💡 Let's be honest from a ten-year installation veteran.
Can't get the tension right? That's what it is.Too lazy to measure--The money saved by taking a tensiometer over by feel is enough to buy ten instruments!
Can't fix a runaway repeatedly? Oftenreactive (rather than proactive)--The rails were adjusted half a day, and it turned out to be foundation settlement pulling the steel frame askew.
Remember these three iron rules:
Precision is saved.: Tensioning error holding down ±5%, annual electricity savings for the motor ≈ the cost of replacing three new chains;
Security is keyed up.: Protective mesh holes > 8 mm? Wait for the safety ticket to arrive before the repair order;
Life expectancy is calculated: For every 0.1mm offset of the sprocket, the life of the bearing is cut in half.
(Data support: Industry Maintenance Report 2025 + actual measurement of factories in 11 provinces)
