New Center Line Scribe, a Prototype

[JTknives]

I have been playing with ideas for a new center line scribe for a while as it seams like all the ones i have seen are about the same in concept any way. I just don't really like to hold the knife and scribe and try and operate them both at the same time and get a straight line. so I decided it was time to bust out my idea and see how it works, so far i could not be happier as it works just amazing. I will be doing some extra of these and listing them for sale. I'm sure you want some pictures so here you go. the body is hardened D2 and the screw is stainless steel (of course ) the carbide scribe is a turning insert that has specially been chosen for this use as it cuts very well and has a very small radius. the body has engraved hight marks which co-inside to the tip of the scribe. each mark raises the tip .025 and there are marks on each side to allow using both hands. the bottom of the body is polished so as to glide easily while scribing. when i do list them thy will include a Allen wrench as well as a nifty storage tube. to use it you lay your blade on a flat surface and set your hight on the scribe and then ether drag the scribe along the edge or hold the scribe still and move the knife across the scribe. o and the body is 2.25" long to enable a firm grip. Like i said it works great and makes a rock solid straight line. i could not be happier with how it turned out, first class all the way.

 

[JTknives]

here is the storage tube. The scribe needed somthing as the carbide is not very cheep, so it needed to be protected. Its a nice little way to store it and it can slip in your pock or sit on your self and not roll off.

 

[C.Edmondson]

Jt Im ready to buy one of those!!!, Let me know if your thinking about making a few extra,CHarlie

 

[gunsto]

looks like a good idea to me i think it would help those of us that ore all thumbs !:thumbup:

 

[NickWheeler]

That's a nice looking piece of work Jarod, but is there some advantage to this over a height gage that I'm not seeing? Especially since you're working in a machine shop.....?

 

[silver_pilate]

Of course there is, Nick. He built it himself! Glad to see you posting again, brother.

Nice little design, JT.

--nathan

 

[eyeeatingfish]

How much are you going to sell this for? Or is it just an invention of yours?

 

[SteelSlaver]

Nick I got a granite machinist block and a height gauge like yours after seeing how you set things up. It is a great setup and is what I will use.

But, this tool is great to. I like it because it wouldn't take up much space and would do a great job. The clever use of the carbide cutter is a great idea along with the graduated height marks. This thing will "Getter done"

 

[Los Angeles]

You should contact an attorney and patent this invention.

 

[JTknives]

I'm guessing that it will be around maybe 45 bucks when done. just the carbide insert is kinda pricey and D2 is not cheep ether. what do you think its worth. I could make a bunch of them if there is interests. i would need to do them in batches of 10 or so because i have to order the carbide in packs of 10. I wanted to use D2 because it will resists rusting better then just a mild steel and it will when hardened last probable forever

 

[balibalistic]

Cool as all hell!!! i'm in :thumbup:

 

[Keith_H]

That is neat. I like how it has a handle. $45 seems really reasonable for the way that it is made.

 

[bikermikearchery]

Cool. I'll be waiting.

 

[JTknives]

Just the carbide is fifteen bucks.

 

[heatheninthehills]

For some reason I'm not seeing how this works. but I tell ya even if it was a bit more than $45 I would still buy one).

 

[JTknives]

OK it looks like there is quite a bit of interest in this little gem. I really had to go over my math as i suspected i was off a bit with the index marks. as it just happens i was and now its all sorted and ready to go. I changed the index size from .025 to .03125 which is 1/32" this should make it easer to read as the lines will be just a bit further apart and also easier to figure your center for the the thickness steel you have. the marks go all the way up to .375 which is 12/32". i don't suspect you will be making a knife that is .75" thick but hay you never know right. i wanted to give a good range. here is a basic drawing of how the index layout was decided. man thank goodness for Solid-Works , the way it works is that the first mark is zero and each mark after that adds 1/32" to the scribe hight.

 

[ddavelarsen]

I'm interested too JT - that's way better than the one I made!

 

[Dagr]

I love the design, and for what you are offering the price seems reasonable. But I do wonder if you couldn't use another material than D2 (I know, I know, it's cool as hell :O) - should leave a little more coin in your pocket, and I'm sure any hardened stainless would perform just as well.

When you do have a few ready for sale, I'd definitely be interested!

~ Ian

 

[jll346]

Could definately use a cheaper steel as the carbide is the important part. Many scribes use O1.

 

[JTknives]

Yes i could use a cheaper material and i might but i am the kind of person the likes to step up the bar and go over the top. I could even do them out of M2. but I like the idea of D2 as it will be easier to heat treat and keep a good surface finish as i can air quench them. and I'm looking at a around 5 bucks for material for each scribe. I might end up using O1 but we will see. I would want them to be harder to rust and that is why i was thinking D2