Tiny tabletop bandsaw - video

[Jon]

Tiny tabletop bandsaw. By Michel Uphoff. 28:04 video:

[Jon]

Part 2. By Michel Uphoff. 7:12 video:

[Jon]

Part 3. By Michel Uphoff. 19:29 video:

[Jon]

Part 4. By Michel Uphoff. 28:40 video:

[uv8452]

Part 2. By Michel Uphoff. 7:12 video:

Dear Michel,
a miniature bandsaw is a nice idea - and in your case very well / carefully executed. I modified a Metabo (accessory-) bandsaw and I was confronted with fissured blades. Disc diameter even 160mm. Blade thickness 0.6 mm. I had to decide if the diameter or the blade material is the culprit. See the calculation of the pulsating stresses of the blade when it bends over a disc.

bandsaw.pdf

Far less known are the properties of the blade's steel. No one gives numbers.
You can derive the tensile strength of the material from its hardness (think of your wonderful hardness tester). But going down to the yield strength and further to the fatigue limit for pulsating forces is sheer guesswork, or the realm of experience. Mine is: Some blades show fissures after, say, 10 minutes of use - some (with the same geometry, always appropriate speed) last an estimated hour (of accumulated cutting). I didn't try different brands yet, though. I would conclude that we both (ø120 and 160) are still in the danger zone. All my best Ulrich

[Jon]

Part 5. By Michel Uphoff. 27:21 video:

[Jon]

Part 6. By Michel Uphoff. 19:33 video: