Could someone give me a rundown on the proper way to regrind planer knives
on a tool grinder? We have one of those makita sharpener dealies, and it
has a tool rest with a fixture to clamp planer knives in, but I'm not well
versed in the method, and I'm afraid of burning up the knives. I don't
much want to do it by hand, because the knives are full of 1/32" nicks.
Don't worry, the knucklehead that ran the boards full of nails through it
is banned from the shop
planer btw is a grizzly 15", stationary cutterhead type, 3 knives I believe
Go to Highland Hardware's site:
About halfway down the page click on the "More Information" link for
their own write-up on how to use it to sharpen jointer/planer knives.
I use the Makita to touch up my 12" planer knives and 8" jointer knives
but I wouldn't mess with trying to grind out large nicks on this machine.
I'd send them out. The reason I do touch ups is because nobody local to
me does a good enough job and it's not cost effective to do it mail
order. However, I wouldn't trust myself to get them straight and
parallel when doing heavy grinding - I'd bite the bullet and pay someone.
Scott Post firstname.lastname@example.org http://home.insightbb.com/~sepost /
Follow the directions that came with the Makita. That's what I did, and
they've worked for many years of mine and others' knives.
Only thing I would recommend in addition is to make an angle jig for setting
the fixture say 165 degrees for most knives, and to recheck the support
screws behind the blade, snugging before you release the sharpened one.
Makes the second and third easier.
The water will keep you from burning the blades, but progress will be slow
if you have only the fine stone. For the much-abused planer at school (also
a 15" Grizzly), I take a couple passes with the 60 or 80 grit green stone
they offer, then go to the fine.
is still active, and good for other things.
I'm sorry, the one we actually have isnt the makita, it's a grizzly. It's
similar to the makita, but it doesnt have the water reservoir. Also, it's
old and the stone needs dressing I think.
Can I get away with just dripping some water on the stone manually as I
On Sun, 25 Jan 2004 13:21:08 -0500, George wrote:
Now I don't know what your machine looks like, so can only speculate that a
stone made to be used wet would have a reservoir, a stone without is
probably designed for dry.
If this, looks like dry is it.
Only similarity between it and the Makita appears to be the knife holder.
Oh yes, fumblefingers meant to type 145 degrees, not 165, though that gives
30 degrees, some are 35.
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