Circular saw blade sharpening jig

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Project by Dynamike posted 08-08-2015 03:42 AM 12759 views 23 times favorited 14 comments Add to Favorites Watch

So I built this contraption a couple of weeks ago. It was dreamed up out of pure necessity. My blades, all of them, were pathetically dull and I kept putting it off and putting it off, because it’s darn expensive to have blades sharpened. Retired and all I had to think of something. I’m not naive enough to think that this thing can sharpen a blade as well as a machine but I do think that sharpness in all of it’’s forms is relative. This machine actually works quite well. The motor I acquired on a local sale site and thanks to Scotty D’s Woodworking answering the add I put out. I chopped it up to a shape I could use and mounted it. The lower table is adjustable perpendicular to the diamond abrasive in micro increments to fine tune the tooth angle. I did the first blade (which you see here) with a 600 grit diamond disk, but it isn’t nearly fine enough. I have a 1500 and 2000 in the way. I’ve been using the blade for a couple weeks now and it’s like cutting butter. I forgot how nice the blade was when it was new. Virtually no burn what so ever. I’m happy with it.

-- "It's not scrap until it's sawdust", and maybe not even then...MAKwoods

14 comments so far

View mbs's profile


1657 posts in 3141 days

#1 posted 08-08-2015 03:53 AM

Smart Idea. You’ll have the sharpest blades on the block for sure.

-- Sorry the reply is so long. I didn't have time to write a short reply.

View kiefer's profile


5622 posts in 2868 days

#2 posted 08-08-2015 04:13 AM

That looks like it’s working just fine .
Nice to have a sharpening machine in the shop .
What size is the blade and what is the motor RPM ?


-- Kiefer

View CharlieK's profile


581 posts in 3994 days

#3 posted 08-08-2015 12:22 PM

Very clever! Can you adjust the angle where the diamond disk meets the blade?

-- Adjustable Height Workbench Plans

View Stanley Coker's profile

Stanley Coker

254 posts in 3396 days

#4 posted 08-08-2015 01:39 PM

Great ideal, I would love to have the plans, if you would care to share.

-- Stanley, North Georgia

View TroutGuy's profile


224 posts in 3912 days

#5 posted 08-08-2015 07:40 PM

I like this idea a lot! I will be interested to hear how you like the finer grit diamond wheels. Please let us know.

One caution – if you’ve got a chipped tooth that you’re trying to fix, start with the coarse wheel. You don’t want to ‘hog material off’ with your 2000 grit.

-- There is nothing in the world more dangerous, than a woodworker who knows how to read a micrometer...

View TheFridge's profile


10732 posts in 1687 days

#6 posted 08-08-2015 08:01 PM

I made a crappy jig once upon time. Worked ok.

The carbide dust messed with me bad though. Not hospitalization bad but my lungs hated me for a couple days kind of bad. I’d suggest some kind of collection if possible.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View b3528294's profile


10 posts in 1481 days

#7 posted 08-08-2015 10:37 PM

Have you seen this video?

It’s kind of the same idea.

View Dynamike's profile


83 posts in 1540 days

#8 posted 08-09-2015 12:06 AM

@ kiefer 6 inch diamond disk, 5/8 arbor. Motor is an old cordless Circular saw which spins at 2600 RPMs.
@Charlie K. The lower table moves from side to side to change the contact angle of the tooth.
@b3528294. That guy in the video has no control over how much tooth material he’s removing or the contact angle. He’s just eyeballing everything.

-- "It's not scrap until it's sawdust", and maybe not even then...MAKwoods

View Dynamike's profile


83 posts in 1540 days

#9 posted 08-09-2015 12:09 AM

@Stanley Coker. Sorry there are no plans bud. This is the final one of 4 mods and design changes all done out of my head bro, but Copy to your hearts content from the pictures though.

-- "It's not scrap until it's sawdust", and maybe not even then...MAKwoods

View Dynamike's profile


83 posts in 1540 days

#10 posted 08-09-2015 12:16 AM

-- "It's not scrap until it's sawdust", and maybe not even then...MAKwoods

View Woodwrecker's profile


4200 posts in 3776 days

#11 posted 08-09-2015 01:13 AM

That’s really using the old noodle brother.

View 489tad's profile


3470 posts in 3212 days

#12 posted 08-09-2015 05:08 AM

Man that looks like a fun build. Hats off to you for solving a problem. I looked at your other projects and you have an engineering mind. I’m looking forward to see what you come up with next.

-- Dan, Naperville IL, I.G.N.

View deon's profile


2522 posts in 3227 days

#13 posted 08-09-2015 07:53 AM

Excellent idea

-- Dreaming patterns

View Jim Jakosh's profile

Jim Jakosh

21733 posts in 3306 days

#14 posted 04-08-2016 03:14 AM

That is a real neat setup. I have been thinking about the same thing but have not done anything on it yet. I just took a 60 tooth carbide blade in for sharpening and it $18 to sharpen a a $60 blade.

Do you use any water on the diamond blade to cool it?

Does they blade turn on a central spindle to index the teeth?

Thanks for posting…...............Jim

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

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