5 Minute Layout Knife!

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Project by Jerry posted 04-01-2010 05:14 AM 4285 views 15 times favorited 15 comments Add to Favorites Watch
5 Minute Layout Knife!
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Ever wonder what to do with those “Dull” razor blade knives that you “Break-Off” and throw away? All sorts of handy little scrapers, marking knives, mini-chisels etc. can be made from this great little piece of hardened steel.

Here is an example of what I did with the last piece in the knife.

Next simply mark out the desired shape of your tool with a sharpie, we will do a simple marking or layout knife

Next we will cut this shape out with a little cut-off wheel in a dremel tool

A quick rounding off of the sharp corners on the disc sander give us this! I have tons of these laying around my bench, a quick swipe on your strop with a little compound on it and its back to razor sharp again. I use these “As-Is” many time but a little slit in a dowel, a drop of CA glue and a quick sleeve of electrical heat shrink give a tool with more reach and versatility. Here is how I “Finished This one off”.

You can make little angle chisels, scrapers that work great for glue removal, marking knives, let your imagination and sharpie guide you! Literally less than 5 minutes from start to finish.



-- "The Bureau of Alcohol, Tobacco, Firearms and Explosives should be a Store, Not a Govt. Agency"

15 comments so far

View Broglea's profile


685 posts in 3116 days

#1 posted 04-01-2010 05:32 AM

Looks like a lot more fun than buying one.

View TopamaxSurvivor's profile


18288 posts in 3701 days

#2 posted 04-01-2010 06:23 AM

Great job. I never throw away old blades of any kind ;-)

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View FordMike's profile


155 posts in 3496 days

#3 posted 04-01-2010 07:00 AM

Very creative, there’s something enjoyable about making your own tool and using it.

View Cozmo35's profile


2200 posts in 3061 days

#4 posted 04-01-2010 02:20 PM

Great idea…

-- If you don't work, you don't eat!.....Garland, TX

View NBeener's profile


4816 posts in 3199 days

#5 posted 04-01-2010 03:24 PM



-- -- Neil

View Jason's profile


659 posts in 3534 days

#6 posted 04-01-2010 04:40 PM

Nice idea. Thanks for the tip.

-- Jason - Colorado Springs

View a1Jim's profile


117117 posts in 3602 days

#7 posted 04-01-2010 04:46 PM

Cool Idea

-- wood crafting & woodworking classes

View mafe's profile


11730 posts in 3115 days

#8 posted 04-01-2010 09:17 PM

Good idea, easy and fast, and then it’s easy to replace the blade.
Is it possible to shapen these blades?

-- MAD F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View PurpLev's profile


8536 posts in 3674 days

#9 posted 04-01-2010 09:27 PM


just one thing to consider – this blade is double beveled leaving the cutting edge centered to the blade thickness, which might be limiting when trying to mark a line against/flush another piece (joinery etc). in which cases, a single bevel edge works better.

still – nice reuse of disposables, I’m always in favor of that.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Jerry's profile


76 posts in 3178 days

#10 posted 04-02-2010 06:17 AM

Good point PurpLev, when you are at the belt sander its quite easy to simply grind off the factory edge and only bevel one side or the other, I have two like this, one with a RH bevel and the other with a LH bevel for tight spots its nice to have a “Dedicated’ blade to mark with. BTW, since I started using machinist squares and marking knives instead of woodworking squares and pencils the level of accuracy in my work has improved greatly. Takes a little getting used to the “Change” in procedure but once you get the hang of it a pencil line looks huge and sloppy in comparison.

-- "The Bureau of Alcohol, Tobacco, Firearms and Explosives should be a Store, Not a Govt. Agency"

View BTKS's profile


1986 posts in 3490 days

#11 posted 04-03-2010 04:32 AM

Cool, I can use the old blades from a utility knife too. I keep and old plastic container with a slot in the lid to drop the used ones into. Hate to throw them unprotected into any trash container. This is a great idea, thanks for posting. BTKS

-- "Man's ingenuity has outrun his intelligence" (Joseph Wood Krutch)

View bigike's profile


4052 posts in 3314 days

#12 posted 04-03-2010 04:20 PM

cool little marking knife!

-- Ike, Big Daddies Woodshop,

View studie's profile


618 posts in 3172 days

#13 posted 04-04-2010 10:21 AM

That’s very cool to make an improvement for the sake of accuracy! We all should do our best to take the time & steps to make our work better. The big plus is that you have a sweet lil item that no one (until now ) has. I sharpen my utility blades with a diamond hone in less time than replacing it. Thanks for sharing a great idea!

-- $tudie

View Dennisgrosen's profile


10880 posts in 3141 days

#14 posted 04-12-2010 08:31 PM

thank´s for the tip and toturial great work


View Dave's profile


11429 posts in 2865 days

#15 posted 01-10-2011 07:01 AM

It, like a lot of oriental tools has some zen to it. Ill be making one tomorrow.

-- Superdav "No matter where you go - there you are."

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