Hobby Band saw - Router Forums
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post #1 of 32 (permalink) Old 02-25-2020, 01:10 PM Thread Starter
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Default Hobby Band saw

Iím building a bandsaw as a hobby from a YouTube video which I modified to suite my needs. Most if not all the videos I have seen have two wheels but I want to used 4 wheels as per attached picture (2 wheels of 6ĒOD + 2 wheels of 1.5ĒOD). I have no experience with bandsaws and I wonder if itís a bad idea to use 4 wheels instead of 2 wheels.

If successful it will be used for homemade crafts.
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post #2 of 32 (permalink) Old 02-25-2020, 01:29 PM
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All the wheels will need to be aligned so the axles are parallel. This is why 3 wheel bandsaws are harder to keep properly set up. 4 would only make it worse.
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Measure twice, cut once and CROSS OUT THE WRONG MARKS.

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post #3 of 32 (permalink) Old 02-25-2020, 02:05 PM
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I would say the alignment difficulty goes up exponentially with each wheel past two. But maybe you'll get lucky and it will work. If there's a way to do it with just two wheels I think you'll like and use the saw a lot more.

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post #4 of 32 (permalink) Old 02-25-2020, 03:52 PM Thread Starter
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Now I understand the popularity of the 2 wheels and I agree. I will give it a try and if not successful (most likely I will not be!) I will switch to the 2 wheels.

To keep the same frame I figure I will need 7”OD wheels and the max. width of my cuts will go down to around 6.7”.

My thanks to both

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post #5 of 32 (permalink) Old 02-25-2020, 04:25 PM
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Another possible issue: Your two extra wheels are kinda small in my opinion. They could stress the blade more, bending at that radius.
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post #6 of 32 (permalink) Old 02-25-2020, 05:01 PM Thread Starter
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Good point Paul but the min. radius for this thin scroll blade is 1/4” (blade is 59.5” long, 15TPI)
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post #7 of 32 (permalink) Old 02-26-2020, 08:23 AM
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Interesting project. Please post as to the final outcome and results.
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post #8 of 32 (permalink) Old 02-26-2020, 09:12 AM
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Wow 1/4" radius seems very small.

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post #9 of 32 (permalink) Old 02-26-2020, 09:20 AM
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Quote:
Originally Posted by kolias View Post
Good point Paul but the min. radius for this thin scroll blade is 1/4” (blade is 59.5” long, 15TPI)
You misunderstand, that quoted radius is of the CUT in soft wood. NOT the amount of side bend you can put on the blade.
The blade will break, again, and again, and again.
4 wheels... DOOMED to failure. (Theres a good reason why nobody in the world makes a 4 wheel bandsaw)
3 wheels... there are three wheel bandsaws, but they are notoriously difficult to get running properly.
2 wheels... theres a reason 95% of bandsaws have two wheels.
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post #10 of 32 (permalink) Old 02-26-2020, 09:37 AM
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Quote:
Originally Posted by sunnybob View Post
You misunderstand, that quoted radius is of the CUT in soft wood. NOT the amount of side bend you can put on the blade.
The blade will break, again, and again, and again.
4 wheels... DOOMED to failure. (Theres a good reason why nobody in the world makes a 4 wheel bandsaw)
3 wheels... there are three wheel bandsaws, but they are notoriously difficult to get running properly.
2 wheels... theres a reason 95% of bandsaws have two wheels.
I agree... The small wheel radius is like bending a paper clip over and over until it breaks. The blades are doomed. Consider how many flexes the blade has to make per rotation.
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