Infinity Combo-Max Saw Blade — and the Amazon Alternative
Infinity sells direct, not through Amazon. If you want a premium 40-tooth combination blade delivered, the Forrest Woodworker II is the one.
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Infinity Cutting Tools sells its blades and bits direct through infinitytools.com. They are not on Amazon in any reliable way, and the occasional listing you find is a reseller. Their blades are genuinely good and ordering direct is easy, so if the Combo-Max is what you want, go there.
What follows is about the blade class, and about the best Amazon-buyable equivalent — because “which blade should live on my saw” is the question underneath this search.
What a 40-tooth ATB actually does
Tooth count trades speed against finish. A 24-tooth rip blade has big gullets, clears chips fast and rips thick hardwood happily, and leaves a crosscut that looks chewed. An 80-tooth crosscut blade leaves a glass-smooth crosscut and will burn and bog if you try to rip 8/4 oak with it.
A 40-tooth ATB (alternate top bevel) sits in the middle deliberately. It rips well enough that you will not reach for the rip blade, and crosscuts well enough that most joinery surfaces come off the saw ready to glue. For a one-blade shop, this is the specification.
Kerf, and whether your saw can drive it
The Forrest scored here is a .125 in full kerf. A thick plate is stiffer, deflects less and cuts straighter — but it also removes more wood, which means more work for the motor.
On a 3 HP cabinet saw, a full kerf blade is the right choice every time. On a 1.5 HP contractor saw ripping thick stock, a thin kerf blade of the same tooth count will cut faster and bog less. Match the blade to the saw, not to the review.
Resharpening changes the arithmetic
A premium blade is not a consumable in the way a hardware-store blade is. Forrest and Infinity both resharpen their own blades and retension the plates. Two or three sharpenings over a decade makes the cost per year comparable to replacing a cheap blade annually, and the cut quality stays put.
The cheap blades are not bad — a Diablo 40-tooth is a fine blade for a fraction of the money. The premium blades are better and last longer, and whether that is worth it depends on how much timber you push through.
What works
- A 40-tooth ATB grind is the genuine compromise blade: it rips 8/4 hardwood without bogging and crosscuts cleanly enough that you rarely change blades
- Thick .125 kerf plate stays flat and resists deflection, so the cut face is square rather than slightly dished
- Forrest will resharpen and retension their own blades, which makes the price an amortised cost rather than a purchase
What doesn't
- A full .125 kerf demands more of the saw — on an underpowered contractor saw it will slow the motor where a thin kerf would not
- It costs three to four times a good Diablo, and the Diablo is genuinely good
- A combination blade is by definition not the best crosscut blade or the best rip blade, and a dedicated 80-tooth will leave a better crosscut