sharpening planer knives?

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by hlpaint posted 04-07-2009 08:16 AM 8458 views 0 times favorited 9 replies Add to Favorites Watch
View hlpaint's profile


26 posts in 3364 days

04-07-2009 08:16 AM

I have never sharpened my planer knives and now the wood is jumping out of my hands. Is this something I should have done by a pro or is it like sharpening hand plane blades only longer. Another thougt, how do I keep the blades at the right position. My planer has springs under each blade and they keep jumping out of position when I tried to set them. I tried to put them back in after I removed them to see if they needed sharpening, which they did. Any help would be helpful.

-- The guy who makes no mistakes hasn't done anything

9 replies so far

View lew's profile


12056 posts in 3752 days

#1 posted 04-07-2009 01:58 PM

Each planer has some unique setup procedures. If you have the manual, follow those instructions. If you don’t have the manual, please post the make/model of the planer, someone here may be able to give you specific instructions.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View John Stegall's profile

John Stegall

505 posts in 3513 days

#2 posted 04-07-2009 02:07 PM

As to the sharpening, it is important that the same amount of material be removed from each blade. After having mine “professionally” sharpened, I decided to do it myself. When they came back they dulled very quickly. I found an old picture that I had saved and made up my own jig. It is just a block of wood that sets the knives at the desired angle so that I can just go over the top of the blades with my DMT sharpeners and I am quite pleased with the result…or I was until I decided to move into a shop sans electricity. Planers do not like long extension cords, and besides, I am enjoying being dust free. I will try to post a drawing when I have the time to use Sketchup.

-- jstegall

View rtb's profile


1101 posts in 3710 days

#3 posted 04-07-2009 04:17 PM

If you don’t have a manual most manufactures will have one on line. Have you considered new blades it might be the most practical way to go

-- RTB. stray animals are just looking for love

View SnowyRiver's profile


51457 posts in 3477 days

#4 posted 04-07-2009 05:40 PM

I agree with rtb. It might be best just to install new knives. I chipped the knives in my jointer a while ago, and I was reading the manual on how to sharpen them. They lowered the outfeed table down a bit, put a stop block on the infeed table and put a sharpening stone over the blades and turned the jointer on. Something about this that scares me. I decided to just buy new knives. There are usually some good deals for new knives on Ebay. I tired those and they worked fine.

-- Wayne - Plymouth MN

View BlankMan's profile


1490 posts in 3350 days

#5 posted 04-08-2009 03:35 AM

Yeah, I agree too, I’ve never sharpened my planer knives, just replaced them. My jointer knives I’ve never replaced I’ve always had them sharpened, professionally. Maybe someday I will sharpen them myself but for now, $10-$12 to have someone do it while I continue to make chips is worth it to me. I always keep a sharp set on hand for the jointer so that if they get dinged in the middle of a project I don’t land up dead in the water. That worked well for a while, then I couldn’t find them when I needed them so I bought another set. Then I found them, go figure, so now I have three sets for my jointer.

My planer knives can’t or shouldn’t be sharpened, they’re indexed so there’s no adjustment. They’re dual edged so I get two uses out of them though. I’ve read where people have discussed getting them sharpened but because they’re indexed each knife would have to be sharpened exactly the same and would who ever is doing the sharpening take the time to do that or even have the capability to do that. I don’t know that I could. I buy a set and keep them on hand when Rockler has a 25% coupon going or buy one item get 50% off on the second.

-- -Curt, Milwaukee, WI

View Pete_Jud's profile


424 posts in 3750 days

#6 posted 04-08-2009 04:12 AM

I have 3 sets of planer knives. They are sharped by a guy that sharpens all the blades and knifes for a local sawmill/door plant. He charges me around 18 bucks for each set of 15 inch knifes. The last set that I bought at Western Tool set me back around $120 so I can get each one done for around 15 percent of the cost of a new set. Hlpaint, I don’t know what brand of planer that you have, but mine came with a “jig” that sets down on the rolling casting that the blades fit into. It only takes me a couple of minutes to hold the jig down on the roller and set the blades. It seems to take longer to take the cover and dust shute off than change the blades.

-- Life is to short to own an ugly boat.

View John Ormsby's profile

John Ormsby

1285 posts in 3734 days

#7 posted 04-08-2009 04:30 AM

You need to use a jig to adjust the knives properly. Below is a link for the best price. The other link shows how they are used.

-- Oldworld, Fair Oaks, Ca

View hlpaint's profile


26 posts in 3364 days

#8 posted 04-08-2009 05:10 AM

I have called a shop where I live and they say they should be able to sharpen them. I will try that first and if it doesn’t work I will buy new. Thanks for all your help, nice to know you can get informed answers by just asking.

-- The guy who makes no mistakes hasn't done anything

View Todd A. Clippinger's profile

Todd A. Clippinger

8901 posts in 4096 days

#9 posted 04-08-2009 05:48 AM

I have two planers, a DeWalt 12” and a Jet 15”.

They both use jigs for setting the knives. The springs under the knives gently push them up to the jig that sets them to the proper height.

I have 3 and 4 sets of knives for each and pay to have them professionally sharpened. They come back to me like brand new every time and at a reasonable cost. It is not worth my time to sharpen them, even if I had the equipment.

-- Todd A. Clippinger, Montana,

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics