Band saw leaving black marks on my wood?

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Forum topic by namrufmot posted 02-07-2016 09:17 PM 640 views 0 times favorited 7 replies Add to Favorites Watch
View namrufmot's profile


54 posts in 651 days

02-07-2016 09:17 PM

Just got a nice old 14” Delta band saw. Thing runs great and even has the coveted retirement light. I did notice that the tires are a bit worn but the thing runs like a champ with no slipping.

Anywho, I cut a few test pieces and it left some black “smears” or “streaks” on the side of the wood. Any idea what would cause this?

7 replies so far

View dhazelton's profile


2591 posts in 2080 days

#1 posted 02-07-2016 09:20 PM

Black as in burns? Dull blade. Too slow feed speed.

View eflanders's profile


211 posts in 1634 days

#2 posted 02-07-2016 11:30 PM

Misaligned blade guides???

View Clarkie's profile


448 posts in 1625 days

#3 posted 02-07-2016 11:34 PM

Hello, did you have an old blade on the saw. Could just be pitch left behind on the blade or rust from sitting too long.

View namrufmot's profile


54 posts in 651 days

#4 posted 02-08-2016 12:17 AM

New old blade…it had never been used but is old…it is “black” not silver in color like brand new Olsen blades…

View JAAune's profile


1761 posts in 2100 days

#5 posted 02-08-2016 12:19 AM

It seems whatever is causing the blade to appear black is getting on the wood. I can’t think of any reason why an unused blade should be black unless something is on it.

-- See my work at and

View 716's profile


502 posts in 700 days

#6 posted 02-08-2016 12:44 AM

Would be much more informative if you instead of the saw pictures you took photos of the marks.

-- It's nice!

View TheWoodRaccoon's profile


364 posts in 713 days

#7 posted 02-08-2016 01:21 AM

Most likely:

-The blade itself is dirty, and transferring/smearing on the wood. The tires and or guides could also be dirty, which would transfer to the blade, and then to the wood.

-The blade is dull.

-Too slow of a feed rate

-- still trying to think of a clever signature......

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