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Reply by jonah

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Posted on Why does my bandsaw blade track towards the front of the wheel?

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jonah

2080 posts in 3813 days


#1 posted 06-25-2017 12:03 AM



Check on this, but I think I ve read some brands of saws are designed with non coplanar wheels. IMO what he says will not work on every machine especially ones with non-crowned or very low crown tires. I was advised not to change the factory settings, only if replacing the bearings.

Jonah, its not that simple. Lots of people advocate the Snodgrass video. No intention to start a debate, but be forewarned what he says re: drift has never worked for me (and not just me).

To me, its a whole lot easier and quicker to live with drift. 2 minutes to adjust the fence and I m back to work. I ve talked to tech I think at Powermatic and he said some bandsaws are actually designed for drift. I believe this is true because the manuals for both my saws (Rikon and Jet) have instructions on adjusting fence.

I suggest you call tech support for your saw and run it past them.

- rwe2156


Thinking about the physics of a band saw, coplanarity has no place in the thing. It couldn’t matter less whether or not the wheels are coplanar. All that matters is what happens when the blade meets wood. If the wheel is crowned and the gullet isn’t centered on the crown, the blade will deflect to the side. If the gullet is centered on the crown it will stay straight. The only wheel that matters is the top one. The bottom wheel is just power delivery. The top wheel affects how the blade enters the guides and how supported it is. Who cares about the part of the blade that’s not going to be cutting until it comes all the way back around again?

I’ve never used a band saw without crowned wheels, so I can’t speak to how that affects things. I will say that both band saws I have and the few others I have used have not had any blade drift once I got them adjusted properly.


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