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Prototype Sharpening Jig

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Project by luv2learn posted 606 days ago 3153 views 28 times favorited 15 comments Add to Favorites Watch

I was debating on whether to post this prototype sharpening jig that I made at the request of a friend who works for an outfit called Bullet Tools here in Idaho. They needed a simple jig to sharpen blades that were from 13” to 24” long. The bevel on these blades are all 18 degrees with a 25 degree micro bevel. These blades are used in their laminate, foam, and insulation cutters. The criteria was that the jig had to be simple enough so that anyone in their shop could use it to sharpen blades during individual slow periods.

I made this out of scrap plywood but I did use hardwood for the trunnions. I used the quick change sanding disk system from the sharpening jig I made and posted on LJs several months ago. This is a rather crude jig but it put a razor sharp edge on a 13” dull sample blade they gave me to experiment with.

The bed of the jig is 5”x 18” and the slide is 5”x 27”. the slide can be flipped 180 degrees so that you can load both sides with blades if you wanted too. It will hold all three of my 6” joiner blades end to end and both of my 13” planer blades end to end. The slide handle was an after thought and I will probably change it but it worked for this concept demonstration to Bullet Tools. They are now in the process of designing their own prototype jig using some of these concepts.

Thanks for looking!!

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





15 comments so far

View woodshaver's profile

woodshaver

2597 posts in 1854 days


#1 posted 606 days ago

That is wild! I can’t get enough of this stuff! What a fantastic idea! You put some time into making that jig!
But if it does the job then you win! Did you ever think how much someone would charge for inventing and building some of the things you make? Your amazing!
Thanks for sharing ….Oh! And you do know one idea leads to another and so on….. Not to mention the inspiration you create!

Tony

-- Tony C , My high school shop teacher said "You can do it"... Now I can't stop!

View Lazarus's profile

Lazarus

48 posts in 610 days


#2 posted 606 days ago

That’s a great idea! I wonder if that would work on Dewalt planer blades?

View luv2learn's profile

luv2learn

1481 posts in 804 days


#3 posted 606 days ago

Tony, thanks as always for your kind words and inspiration. I will turn 70 this year and I am still relatively new to woodworking but I love it. It fills my days with joy and satisfaction. If I can contribute a little to the craft by making something that helps a fellow woodworker do his job better or easier then its all good!! After all we are all standing on the shoulders of the craftsmen that came before us. I hope a fellow LJ, if he or she sees some merit in this idea, will take it to the next level then share it with us all.

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

View Bricofleur's profile

Bricofleur

1094 posts in 1694 days


#4 posted 606 days ago

Wow, great ideas here! All components are clever. This is a well thought jig. Congrats! I remember having seen your system, which is also clever. I kepp this one in mind. Thanks for sharing and posting.

Best,

Serge

http://atelierdubricoleur.wordpress.com

-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com

View Jamie Speirs's profile

Jamie Speirs

4037 posts in 1358 days


#5 posted 606 days ago

Now that is clever

jamie

-- Who is the happiest of men? He who values the merits of others, and in their pleasure takes joy, even as though 'twere his own. --Johann Wolfgang von Goethe

View luv2learn's profile

luv2learn

1481 posts in 804 days


#6 posted 606 days ago

Thanks everyone for all the kind words. To Lazarus: This jig can be adapted to sharpen just about any flat blade.

Any of you LJs that want to improve on this concept be my guest just share it with the rest of us if you do.

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

View HalDougherty's profile

HalDougherty

1820 posts in 1738 days


#7 posted 606 days ago

I love the concept. I think the base and blade holder would adapt to my 8” disk sander just fine. I’m going to have to try it. Thanks for the idea! Great jig.

-- Hal, Tennessee http://www.first285.com

View HillbillyShooter's profile

HillbillyShooter

3845 posts in 794 days


#8 posted 605 days ago

Ingenious! You are quite the creative innovator.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

View Jim Jakosh's profile

Jim Jakosh

10249 posts in 1607 days


#9 posted 605 days ago

That is a real cool idea!! I like the quick change grits for the sharpening surface.
That wooden trunnion is a good idea too!! Does it get them real parallel or do you have to do adustments on each blade?
Well done!!!!!!!!!!!....................Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!!

View luv2learn's profile

luv2learn

1481 posts in 804 days


#10 posted 605 days ago

To Jim Jakosh: In regard to the jig being parallel to the sanding disk I would say this: 1. After you build the jig set it on a flat surface and measure both ends to be sure they are parallel with the surface. 2. Make sure your drill press table is true to the spindle. To do this I made a simple gauge of 1/4 diameter steel rod.
Spinning the chuck by hand you rotate the gauge 360 degrees. If the gauge just barely touches all the way around your table is parallel with the spindle.

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

View StumpyNubs's profile

StumpyNubs

5968 posts in 1302 days


#11 posted 605 days ago

This is an great idea. Sharpening those blades are difficult because you have to be sure each blade is sharpened the same, removing the same amount of metal. This jig looks like you can set the depth by locking the drill press in place. A really fantastic design!

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View Roger's profile

Roger

13062 posts in 1305 days


#12 posted 605 days ago

A gr8 lookin jig for sure.

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

View StumpyNubs's profile

StumpyNubs

5968 posts in 1302 days


#13 posted 605 days ago

Hey luv2learn- I see you’re a retired Iron Worker. My family have been iron workers since the turn of the last century. My great-grandfather and his brothers were among the founders of Iron Workers Local 25 in Detroit. Great-grandpa’s first job was building Henry Ford’s famous River Rouge Plant. When they built the Penobscott building (the tallest in the world at the time) in Detroit, he was the only one brave enough to climb to the top and rivet the ball on the spire. My grandfather (his son) was an iron worker, my dad was an iron worker, all my relatives are iron workers. I have a nice collection of early iron worker tools but my favorite is great-grandpa’s rivet pitching tongs.

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View Jeffery Mullen's profile

Jeffery Mullen

319 posts in 1319 days


#14 posted 604 days ago

What a neat jig. I have a few tools that could use a jig like this to get a edge on them Thanks so much for the idea and I will try to make one down the road .

View Mauricio's profile

Mauricio

6693 posts in 1653 days


#15 posted 604 days ago

Wow, this is awesome. I love the semicircle tilting mechanism.

-- Mauricio - Woodstock, GA - "Confusion is the Womb of Learning, with utter conviction being it's Tomb" Prof. T.O. Nitsch

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