I’m resawing some mahogany on a grossly underpowered bandsaw. (20 year old Shopsmith – yeah I know. Soon as I get back to work, I’ll budget for a new one!) The cut is bowing in the middle. Is this caused by a dull blade, incorrect tension, lack of power, pilot error or bad karma? I’ve resawn 6 inch tall walnut before and haven’t struggled like this so I’m looking for some advice before I butcher any more of this beautiful wood. Please help! Kell
Discussion Forum
Get It All!
UNLIMITED Membership is like taking a master class in woodworking for less than $10 a month.
Start Your Free TrialCategories
Discussion Forum
Digital Plans Library
Member exclusive! – Plans for everyone – from beginners to experts – right at your fingertips.
Highlights
-
Shape Your Skills
when you sign up for our emails
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. -
Shop Talk Live Podcast
-
Our favorite articles and videos
-
E-Learning Courses from Fine Woodworking
-
-
Replies
dull blade, maybe the wrong one.
Kell,
Probably dull blade, but possibly too little tension.
kell,
this came up just a few days ago on knots. perhaps a search would set you straight. whenever i have this problem the first place i look is to a dull blade. i determine this by looking very closely as the blade enter the wood. a dull blade "wants" to deflect more or less and a sharp one gets right in there and bites. smoke is not good and indicates dullness.
eef
Bowing is generally a dull blade or a tooth knocked out of set. Sounds as if time for a new blade as they certainly don't last forever.
Kell,
What Sarge said. Mahogony is MUCH harder than walnut, and blades don't last forever. When you install your new blade be sure you pay as much attention to the lower blade guides as the upper guides. In my experience (admittedly relatively limited) blade tension is usually not the problem. Search for Michael Fortune's past article in FW on bandsaw setup and follow it to the letter. I did and now I actually like my bandsaw!
Hope this helps.
Steve
Thanks guys! I apologize for not searching first but this is my first time back to the forum in a few years and I haven't familiarized myself with all the functions yet. Nice to see some of the old gang still here though! And, of course, by old I mean long stayers!
Best!
Kell
Nah, you meant OLD. But old is a gift. Use it wisely, grasshopper.
My lesson from my first week of bandsaw ownership:
Don't hit a screw with a 3 TPI ripping blade. I got the bow of which you speak on my very next cut. Smokey too! I love the smell of burnt maple.
My bandsaw book said not enough tension causes bowing, but I'm pretty certain it was the blade dulling from hitting the screw.
It's been an interesting first week. I should run a camera on my shop. You guys would laugh at the rookie mistakes I'm suffering through. My jointing with a hand plane would have you guys on the floor.
This forum post is now archived. Commenting has been disabled