Rotate the cutterhead to locate the bevel side of the knife forward of center under the stone.
Machine planer blade angle for hardwood.
I should not be surprised given that we use higher angles for hardwoods with hand planes but i d never given it any thought for planer knives.
Set the direction of cut in the jointer and reduce angle from the tip of the blade.
If you go with a standard planer head then use a hook angle of 10 to 12 degrees.
Position jig over blade and cutterhead with the machine unplugged place the jig on the cutterhead and against the chip deflector.
As the steel of the jointer or planer blades is too hard it becomes quite tough and time consuming.
So a bit of googling as to what they should be and i discover that planer knives can vary from 30 to 45 degrees.
Ensure the straightness of.
If the angle is too sharp such as 30 degrees it digs deeper and breaks the shavings into pieces.
With softwoods a slicing action is needed and a hook of 20 to 30 degrees in the head would be needed.
The hook angle is the angle built into the cutterhead that creates the cutting action.
O 1 steel tolerates more acute sharpening vs.
However the plane s angle of attack surely matters too.
A 30 degree angle is ideal for getting a sharp yet durable planer blade.
If the blade angle is set properly the planer will produce long curly shavings of wood.
A 2 or pm blades but the latter two stay sharp longer at a somewhat less acute hone angle.
Blades honed to more acute angles cut better but stay sharp less long.
Both machines cut bevel down so the leading angle of the cut has not changed and there seem to be plenty of clearance in the cutting circle with the 45 blades.
While there is more to consider in edge geometry than just the angle of cut i e durability you could reasonably sharpen the bevel on the iron of a low angle block plane iron to 33 degrees.
However the edge will be less durable.
The blades are set parallel to the table within 001 from end to end.
With hardwoods a scraping action is needed.
My planer blades are adjusted in the machine by using a jig sitting on the table surface with a indicator with the point facing up at the edges of the knives.
The low hook angle provides that.
Mark the location of the knife on the planner body to align the other blades.
Given its 12º bed angle you would end up with an angle of cut of 45 degrees 12º 33º 45º the same as on a standard angle plane.
Sharpening jointer knives by hand is a bit easy when it is done by some machine or a planer jointer knives grinding jig.
The obvious answer is what we all know.
My dc 380 planer and dj 20 jointer were both delivered with hss blades sharpened at a 30 angle.
So my q is this to what angle do you have your planer blades ground and why.
I don t mind any out of balance condition that might exist.
