Most guys know that a good bimetal blade gives you hard teeth and a flexible back.
But here's where it really lives or dies: matching the cutting speed with the feed rate.
Get it right, and the blade glides through. Get it wrong – you'll burn teeth or snap the band.
Rule of thumb is simple. Soft materials like aluminum or plastic?
Go fast. 80 to 120 meters per minute, with a medium-to-heavy feed.
Let the blade eat. But hard stuff – stainless, tool steel – you gotta slow way down. 15 to 30 meters per minute, and keep the feed light. Pushing hard on tough metal just kills the edge.
Now forget the numbers for a second.
The real trick is watching and listening. See blue chips coming off? Or sparks flying from the cut? That's your blade screaming "I'm too hot!" Back off the speed or reduce the feed immediately. Don't argue with it.
On the other hand, if you hear a sharp, squealing noise – high-pitched, like fingernails on a chalkboard – that usually means your feed is too light. The teeth are rubbing, not cutting. Crank the feed up a little until the blade bites. If the noise stays, maybe you picked the wrong tooth pitch.
Bottom line: don't be a slave to the manual.
Every saw and every batch of steel acts a bit different.
Watch the chips, listen to the cut, feel the vibration.
When you get that solid, low-pitch cutting sound and curly, silver chips coming off nice – that's the sweet spot. Your blade will last twice as long.
