Description of π§ Bosch Carbide Plywood Mortising Tool 84603M
Creates cutting diameter to match thickness of 3/4 In. plywood. Produces a tight fit when mortising standard plywood. Balanced cutting with minimal vibration. Micrograin carbide tips provide superior wear resistance and long life.
I don't know exactly why, but the plywood you buy in stores today is not real 3/4" in thickness more like 23/32". The 1/32" size makes a HUGE difference when you're trying to create a tight groove. Usually used when making a bookshelf for some reason (plywood slips up).
Bit size wasn't an issue but the bit I received looked like it was recycled from worn 3/4" birch plywood, dull and chipped. Actually, I wasn't very impressed with her cut to begin with. I have too many Bosch products to list, but this piece doesn't do the Bosch name justice - don't throw a $1 billion-plus rep for a 20 -dollar bit gone - do it right or don't do it at all.
This bit worked very well for cutting 3/4 inch nominal ADX plywood into pressure treated 4x4s. The groove cut was 3/4" deep and the nozzle is still good although all the smoke has seeped out. the router bit that drives this bit. The groove width was just enough that I had to gently press down on the plywood with a rubber mallet to "slide" it into the groove Very little.