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Reply by knotscott

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Posted on Ripping Blades explain?

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knotscott

8416 posts in 4450 days


#1 posted 03-08-2017 02:04 AM

Fewer teeth tends to leave a rougher cut than more teeth, but it also leaves more room for larger gullets to clear away the larger chips caused by ripping, which in turn leads to less resistance, less heat, and less burning. A 24T FTG 10” rip blade excels at ripping quickly and effortlessly in thicker stock with little to no burning. Adding more teeth could lead to a smoother cut, but will also reduce the available gullet space, increase resistance, heat, and burning. It’s simple physics and there is always a trade off.

“Glue Line Rip Blade” is a clever marketing phrase, but you don’t need a blade that says those words to get a glue ready cut. Many blades are capable of a glue ready edge, and it’s important to note that the blade is only one variable in the equation. The saw, the material, and user technique are all contributing factors too….if any of those variables goes wrong, a special blade that says “Glue Line Rip” isn’t going to fix it. It’s also important to note that no saw blade will replace a jointer. If a saw is setup well, and material is flat and straight, a good sharp 24T rip blade will usually result in a glue ready edge…..that doesn’t mean glass smooth or finish ready, but it will usually be glueable as is. The 30T “GLR”s tend to have very tight side clearance to offer a more polished or burnished edge….the trade off is that those characteristics also increase resistance, heat, and tendency to burn, so they’re really only intended for materials up to 1” thick, which really leaves you with a blade that has a very limited operating range. I consider them an unnecessary luxury unless you do mainly ripping with your TS in materials up to 1”. A good 40T or 60T blade with a positive hook will also generally leave a very polished edge in materials up to 1” and even thicker depending on the material and specific blade, plus will be more versatile for many other tasks.

Look to a good 24T ripper for thicker ripping tasks. A good 40T to 50T blade for all around routine ripping and crosscutting, and a good 60T to 80T fine crosscut/ply blade for those times when you need an exceptionally fine cut.

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