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Old 12-26-2011, 09:34 AM   #16
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How to make a planer knife sharpening jig


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Originally Posted by DangerMouse View Post
Just a quick update. I've sharpened 2 sets a few times now and they still perform well.
I HAVE noticed they don't seem to last as long per sharpening as when new.

DM
Do you micro bevel your edges?

Just in case some don't know how to micro-bevel.
A micro bevel is done just after sharpening your blades. A sharp blade with a long angle is really sharp but won't stay that way long because the edge is thin. A working edge is a little less of an angle. Look at a straight razor how thin the edge is, it is sharpened from point to top edge. A work knife will have a pretty good bevel on it so it won't dull quickly like the straight razor will.

Once you sharpen your planer blades raise the back of the blade up just a little and hit it maybe three or four times on the final finish, this will put a very slight edge with a lesser angle which won't dull as quickly but will be sharp.

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Last edited by BigJim; 12-26-2011 at 11:43 AM. Reason: Just being old
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Old 10-08-2014, 09:54 AM   #17
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How to make a planer knife sharpening jig


I understand how to build and use the jig but planers have different knife blade angles. on mine the best I can determine is 45 degrees but other people have said there same model has,36.37, and even 40 degrees. so how can I precisely tell.
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Old 10-08-2014, 10:53 AM   #18
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How to make a planer knife sharpening jig


I wouldn't bother trying to measure the angle. Take the knife and set it on the throat insert of the table saw, with the cutting edge against the blade, parallel with it. Tilt the blade until it is flush against the cutting edge. That's the angle your slots should be cut at to keep the bevel angle the same on the knife.

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