Chains are reliable components of a transmission machine. If you selected the proper chain and use it within its specified conditions, the chain will last for a long time.
However, you must perform regular inspections on the chain to make sure it is in good condition and operating correctly. Perform inspections monthly or more often if the chain is used in harsh environments. Why are inspections important? Over the life of a chain, the pins and bushings wear gradually. There may have been an unexpected shock load on the line, or a malfunctioning oven might expose the chain to very hot conditions.
During an inspection, make sure to check for the following conditions:
- Cracks in the link plates (Figure 7.10).
- Cracks in the rollers (Figure 7.11).
- Rotated pins (Figure 7.12).
- Wear on the end surfaces of link plates (Figure 7.13).
||In addition to the items to check during operation given in Section 7.1.3, also confirm that the lubrication conditions are suitable. (Look at both the method and amount of lubrication.)|
Figure 7.10 Example of a Crack on a Link Plate
Figure 7.11 Cracks on the Rollers
Figure 7.12 Rotation of the Pins
Figure 7.13 Wear on the End Surfaces of the Plates