Machine Planer Blade Angle For Hardwood

The lower you set the angle the sharper your planer blade will be.

Machine planer blade angle for hardwood.

O 1 steel tolerates more acute sharpening vs. As the steel of the jointer or planer blades is too hard it becomes quite tough and time consuming. So my q is this to what angle do you have your planer blades ground and why. Sharpening jointer knives by hand is a bit easy when it is done by some machine or a planer jointer knives grinding jig.

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. Position jig over blade and cutterhead with the machine unplugged place the jig on the cutterhead and against the chip deflector. A 30 degree angle is ideal for getting a sharp yet durable planer blade. However the plane s angle of attack surely matters too.

I bought some freud replacement blades some time a go and they are sharpened at 45. The hook angle is the angle built into the cutterhead that creates the cutting action. Rotate the cutterhead to locate the bevel side of the knife forward of center under the stone. 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.

If the blade angle is set properly the planer will produce long curly shavings of wood. If you go with a standard planer head then use a hook angle of 10 to 12 degrees. 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. I don t mind any out of balance condition that might exist.

With hardwoods a scraping action is needed. With softwoods a slicing action is needed and a hook of 20 to 30 degrees in the head would be needed. 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. Mark the location of the knife on the planner body to align the other blades.

Blades honed to more acute angles cut better but stay sharp less long. Setting the honing guide to 30 degrees requires you to have 38 mm of the planer blade sticking out of the guide. However the edge will be less durable. A 2 or pm blades but the latter two stay sharp longer at a somewhat less acute hone angle.

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. My dc 380 planer and dj 20 jointer were both delivered with hss blades sharpened at a 30 angle. The obvious answer is what we all know. If the angle is too sharp such as 30 degrees it digs deeper and breaks the shavings into pieces.

Ensure the straightness of. The blades are set parallel to the table within 001 from end to end.