Saw Blade Sharpener

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Project by Jim Jakosh posted 07-20-2018 05:19 PM 2002 views 4 times favorited 22 comments Add to Favorites Watch

I had just finished installing a new carburetor on my weed wacker with a saw blade on the bottom and the blade needed to be sharpened. The last time I did this I used a hand held grinder and went along each tooth trying to keep a positive rake on the teeth and I slipped and took out a tooth. So I used some scrap plywood and made a setup using a 4 1/2” angle grinder with the wheel dressed ( with a diamond dressing stick) in a “V”shape to sharpen the teeth safely..

I used 1” Baltic birch and made a V block to hold the grinder and drilled a 1” hole in the V to clear the brush holder. Then I made a long enough base to be able to clamp it to the workbench and made a table to rest the blade on to free hand grind the teeth. The top of the table has a 5 degree taper to put a positive rake on each tooth and that top plate can be flipped putting the angle the other way for the other half of the teeth.

The last shot is the blade that I sharpened. I use it to cut Pampas grass and I found it the most effective way to do it. I don’t have a shot of the blade on the table, but you can get the idea of how it sits with the wheel in each tooth.
I was not going to post this but I thought it might be helpful for someone else if you need to rough sharpen a blade with an4 1/2” grinder.

Cheers, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

22 comments so far

View Ivan's profile


16719 posts in 3918 days

#1 posted 07-20-2018 05:32 PM

Quite simple and interesting!

-- Ivan, Croatia, Wooddicted

View ralbuck's profile


6718 posts in 3317 days

#2 posted 07-20-2018 06:11 PM

Neat idea and well made. Many of us modify and make jigs for many things.

-- Wood rescue is good for the environment and me! just rjR

View Jacksdad's profile


249 posts in 1474 days

#3 posted 07-20-2018 07:05 PM

Great idea

View recycle1943's profile


5282 posts in 2672 days

#4 posted 07-20-2018 07:27 PM

great sharpening idea – but – I put a wheel on my weed wacker once, it ate the wacker

-- Dick, Malvern Ohio - my biggest fear is that when I die, my wife sells my toys for what I told her I paid for them

View lew's profile


13331 posts in 4806 days

#5 posted 07-20-2018 07:28 PM


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

View CFrye's profile


11211 posts in 2890 days

#6 posted 07-20-2018 07:38 PM

That’ll get R done! And probably safer, too!

-- God bless, Candy

View Jerry's profile


3488 posts in 2698 days

#7 posted 07-20-2018 07:47 PM

Very clever!

-- There are good ships and there are wood ships, the ships that sail the sea, but the best ships are friendships and may they always be.

View doubleDD's profile


10260 posts in 3093 days

#8 posted 07-20-2018 08:00 PM

Neat idea Jim. As long as it works and makes things simple, I’m all for it.
So you have a weed wacker with a saw blade on it? Sounds like some seriously trimming.

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View ZAGREB's profile


1276 posts in 2700 days

#9 posted 07-20-2018 08:21 PM

great idea,Jim
thanks for sharing

-- bambi

View luv2learn's profile


3112 posts in 3353 days

#10 posted 07-20-2018 09:44 PM

Simple to build and it does the job. Thanks for posting this Jim.

-- Lee - Northern idaho~"If the women don't find you handsome, at least they ought to find you handy"~ Red Green

View Jim Jakosh's profile

Jim Jakosh

26056 posts in 4156 days

#11 posted 07-20-2018 10:35 PM

Thanks for all the nice comments!

Hi Dave, this is a real nice telescoping shaft Ryobi weed wacker that I have been working on for 4 weeks. I bought a kit for the carb and got it running but it would only idle and then died out when I hit the throttle. a new exact replacement carb from EReplacements parts was $70+SH. I bought a new one on Ebay for some other motor for $12 +no SH and had to modify the throttle cable and the carb spacer to get it to work, but it runs like new now. I thought I’d be sharpening this blade a few more times so I put the time in the fixture for the future.

Cheers, my friends…............Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View NotaJock's profile


183 posts in 2149 days

#12 posted 07-21-2018 12:24 AM

Interesting saw marks in that ‘V’ block but nice looking jig .

-- Mike in SoCal, now East Texas

View tyvekboy's profile


2110 posts in 4063 days

#13 posted 07-21-2018 12:35 AM


-- Tyvekboy -- Marietta, GA ………….. one can never be too organized

View Jim Jakosh's profile

Jim Jakosh

26056 posts in 4156 days

#14 posted 07-21-2018 12:40 AM

Thanks mike and Alex.

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View woodbutcherbynight's profile


8735 posts in 3459 days

#15 posted 07-21-2018 03:01 AM

Slick idea. Garage Engineering at its finest!!

-- Live to tell the stories, they sound better that way.

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