My old, used Delta bandsaw came with Cool Blocks bandsaw guides. I like them, but don't think about them much. They just work. The bandsaw cuts straight when I want straight, and cuts curves when I want curves. The guides do their jobs, and I never notice them.
Every once in a while, I think about replacing the Cool Blocks with ceramic blocks or Carter bearing guides or those Laguna ceramic guides (which guide the blade above AND below the thrust bearing). Some people make their own guide blocks from hardwood. I come to my senses quickly and remind myself, "if the bandsaw cuts well now, why would I change anything?" so I stay with the Cool Blocks.
When I change blades, I adjust the Cool Blocks by pressing them gently against the blade, then easing up on them slightly while tightening the setscrews. I don't bother with folded dollar bills or anything like that. Once setup, I make sure that they are super close to the blade without rubbing, by eyeball.
I don't see smoke or smell anything when I use the Cool Blocks. I don't think there is much friction, but never bothered to feel them after the blade stops. They show some wear, but are reasonably durable.
What do you want to know about Cool Blocks?
Last edited by Tool Agnostic; 01-20-2020 at 10:54 PM.