While I do have some experience on bandsaw portable mills (growing all the time) , I am always learning and there are folks on here that have thousands of hours working with them.
I got some blades from a manufacturer. When I got them I did not really do a close inspection of them but put them on the mill and started to use them.
I tend to use blades, stockpile them when I pull them off and then set and sharpen at a later date.
After several blade issues I started to look at the blades more carefully and noticed that there was an anomaly at the weld where there was a very small tooth remnant.
I questioned how that would effect sharpening since for the remnant to be present the tooth, spacing at the weld had to be different from the rest of the blade. That would make the sharpening process "interesting" as the blade came around and the weld passed through the sharpener. These are 7/8 spacing teeth (0.875). The normal tooth mics out at 0.875 (7/8th) but at the weld the tooth spacing is only 0.084. Not a tremendous difference but a little over 1/32nd of an inch. The gullet grind will remove the mini tooth but the next tooth will take a moderately significant grind and be smaller as a result.
At least I think that is how it will go.
That is not the real issue; at least not initially.
I previously took the following photo to show the mini-tooth but never looked at it until now. I wish I had. I obviously did not inspect the weld area as I was only interested in documenting the mini-tooth with a photo. I should have been more detailed visually.
Having now had 3 blades break at the weld before they ever got to the sharpener for the first time; I am rethinking what I should do next.
Should I put them through the sharpener before I ever put them on the mill or should I do a hand grind of the mini tooth to remove it as it appears to be causing stress fractures in the blade.
I have not done an inventory of the remaining new blades to see if everyone of them has the same mini-tooth. I need to do that. I have gone back and the only blade that made it to "dull" has the same mini tooth as well as the ones that broke in the weld.