Blade Tips & Troubleshooting - Eccentricity

Cause:
Bond is too hard for material being cut. The hard bond retains the diamonds, and they begin to round off, causing the blade to become dull. Instead of cutting, the blade begins to "pound", causing the blade to wear out-of-round.

Remedy
Change to a softer bond, which will rear away more readily allowing the dull diamonds to be released and sharp, new cutting edges to become exposed.

Cause
The saw blade shaft may have a groove scored in it, caused by a blade spinning between the flanges. A new blade, installed on the arbor shaft, will seat into the groove, and immediately run eccentrically when the saw starts.

Remedy
Replace worn shaft.

Cause
If the blade shaft bearings are worn, the shaft and mandrel will run eccentrically, causing the blade to wear out-of-round. This happens most often with concrete saws when proper lubrication of the bearings is neglected.

Remedy
Install new blade shaft bearings. In some cases it might also be necessary to replace the blade shaft if it is worn or out of alignment.