⚠️ Time to Replace! 4 Warning Signs
| Sign | What to Look For |
|---|---|
| Unusual Noise | Buzzing, grinding, or clicking sounds |
| Overheating | >80°C (too hot to touch) |
| Excessive Vibration | Housing shaking, shaft runout |
| Metal Debris in Oil | Metal particles or flakes found when checking lubricant |
Any of these signs? Stop and inspect immediately.
🔧 4 Key Steps to Replace
1. Remove Old Bearing
Use a puller to remove the bearing from the shaft. NO hammering—it damages the shaft neck and bearing seat.
2. Inspect Other Parts
While the bearing is off, check:
- Gears for pitting, wear, or cracks
- Shaft for bending or damage
- Seals—replace all of them (cheap insurance)
3. Install New Bearing
- Heat the new bearing to 80–100°C (max 120°C)
- Slide it onto the shaft while hot
- Apply force to the correct ring: inner ring for shaft mounting, outer ring for housing mounting
- Install new seals, end cover, and snap ring
4. Test Run
- Add lubricant—NEVER run without oil
- Hand-spin: should be smooth, no binding
- Run no-load at low speed first (15–30 min)
- Check temperature, noise, vibration
- Gradually load to normal operation
❌ Common Mistakes to Avoid
| Mistake | Consequence |
|---|---|
| Hammering the bearing | Damages raceways and rolling elements |
| Skipping gear/shaft inspection | New bearings fail quickly |
| Heating >120°C | Steel structure changes, hardness drops |
| Reusing old seals | Oil leaks destroy new bearings |
| Test run without oil | Bearings fail in minutes |
⏱️ How Often to Replace?
Under normal conditions: overhaul every 7–8 years.
But actual life depends on:
- Load and running time
- Lubrication condition
- Maintenance quality
Regular inspection + on-time oil changes = longer bearing life.
FODA BEARING — Make every replacement count
High-quality replacement bearings + professional installation guidance = peak equipment performance.
