Raised Grain and Sawmill Blades
From Gene Wengert, forum technical advisor:
This also shows up with frozen logs. Please describe the blade you are using.
From the original questioner:
I know they are Woodmizer all purpose blades. I bought the sawmill used and they came with it. I am planning on buying new blades but didn't want to waste the blades that came with the sawmill just because I wasn't exactly sure what measurements they were. When the grain in raised like it has been doing can it cause any problems (drying, selling) even if I am only selling the wood as rough cut lumber?
From contributor W:
Woodmizer has several different profiles, multiple thicknesses and widths for the LT40 mill. If you look on the outside of your blades, about eight inches or so from the weld, you will see a series of letters and numbers stamped into the steel, something like this:
The 158 is the blade length in inches, the 9 is the degree of hook. Woodmizer sells 4, 7, 9, 10 and 12 degree blades. Generally, the harder/knottier/drier a log is the lower a hook angle you would want to use. So if you are cutting relatively seasoned pine with a 10 degree blade, it will 'rough up' the lumber more. If you use Woodmizer's blade selector as listed on their website, you will see recommendations for 4, 9 and 10 degree blades in .045 and .055 thicknesses as well as 1 1/4 and 1 1/2 inch widths. If you have a lot of those logs to cut and if the surface is unacceptably rough and if fresh logs cut fine, you might want to consider changing the blade settings.
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