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band saw tpi vs table saw

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Forum topic by squazo posted 11-29-2016 12:46 AM 417 views 0 times favorited 4 replies Add to Favorites Watch
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squazo

51 posts in 1484 days


11-29-2016 12:46 AM

Topic tags/keywords: question

so this popped into my head at work today.

A fine finishing 10 inch circular saw blade having say 80 teeth has 2.5 teeth per inch lets just round that up to 3

now on a band saw blade 3 tpi is considered coarse. not owning a band saw I don’t have much experience with this but it seems to me something is amiss. any thoughts. I do a lot of plywood cutting in my shop so Im particularly interested in anyone’s experience with veneer tear out.


4 replies so far

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Loren

9633 posts in 3486 days


#1 posted 11-29-2016 01:03 AM

Different feed rates in ripping. Sawmill blades
may have 1 tpi due to cutting thick stock. The
gullets carry the saw dust away.

I think with more teeth, the teeth are smaller
and the gullets too but in the case of the table
saw the teeth are moving very fast and tiny nibbles
are taken by an 80 tooth blade, hence less tearout.

A more direct comparison with a band saw rip
blade would be an old steel table saw blade
with set teeth. Carbide tooth blades are a different
species.

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MrUnix

6010 posts in 2037 days


#2 posted 11-29-2016 01:23 AM

Completely different critters.

A 10” table saw is doing over ~10,000 SFPM at the blade tips.
A 14” band saw is doing ~3000 SFPM (older Deltas ran closer to 2000 SFPM).

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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mrbob

182 posts in 407 days


#3 posted 11-29-2016 02:54 AM

Basically comparing apples to oranges.
Gullets size is wood removal, but it is the rmp difference. Or teeth per movement per seconds in time. That is what is the equation that has to be equalized to compare, then throw in the blade width for how much wood is being removed and Kerf width between the 2.

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unbob

800 posts in 1742 days


#4 posted 11-29-2016 03:00 AM

My best set up for splintery stuff is using the Diablo 7 1/4” thin kerf $10 blades, and a fresh zero clearance insert in my Rockwell contractors saw.

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