Re: Freud glue-line rip blade - differences
Knotscott
>I agree with Bill. A 24T blade like a Freud LU87R010 (ATB thin kerf), or an LM72R010 (FTG full kerf), are much more efficient rippers in thick stock. The blades you mentioned are all variations of a triple chip grind 30T blade that's intended to leave a glue ready edge. "Glueline Rip" is a bit of a marketing term. What's often overlooked is that the LM74 is intended to rip only up to ~ 1" thick material...preferable 3/4", which means you'll still want a 24T rip blade for realy thick cuts. Most decent general purpose 40T or 50T blades will leave a glue ready edge too, and will rip to ~ 6/4" and even 8/4", plus will do a good job in a number of other materials and types of cuts.
The LM74 is a nice blade but it has a relatively narrow operating window. As per your question..."R" means it has the red Permashield coating..."M" does not. The "010" or "012" indicate blade diameter.