As you know I've been building my kitchen out of pecan. Well I never knew how tough this wood is on jointer and planer knives. My last set of doors it only took one pass thru the planer and it looked like I had serrated knives in the planer or jointer.
The reason I ask is because I took my planer knives and ran them across some 320 wet and dry sandpaper on a sheet of glass to get rid of the burr and now they are lasting longer than when they were brand new. Same with the knives for my ridgid planer.
Any one have any thoughts on this? Is there an optimum angle for the knives to be sharpened at depending on the type of wood your planing?