Center line scribing

WyoNonSmith · Mar 6, 2012

I have seen a nifty tool used in several shops and feel like an idiot asking what it is called.

it is a flat piece of stone with a micrometer (?) with a scribe on top of it that allows one to scribe a centerline on a knife in process. What is the terminology for this equipment, and where can I find one?

watercrawl · Mar 6, 2012

I'm not sure if this is what you mean or not:

http://www.knifemaking.com/product-p/js305.htm

jawilder · Mar 6, 2012

you may be thinking of a dial height gage

David Sharp · Mar 6, 2012

A granite surface plate and a height gauge?

Here: http://www.use-enco.com/CGI/INSRIT?PMAKA=640-0100&PMPXNO=947969&PARTPG=INLMK3

And Here: http://www.use-enco.com/CGI/INSRIT?PMAKA=891-6098&PMPXNO=3905737&PARTPG=INLMK3

Shaw Blades · Mar 6, 2012

I was shown to take a drill bit that is slightly smaller than the stock thickness, c clamp the drill bit to a surface such as a drill press worktable, then slide the edge end of the blank into the tip of the drill bit. I hope that makes sense and hopefully it helps.

WyoNonSmith · Mar 6, 2012

David66 wins the prize. Thank you!!!

KHDaily · Mar 6, 2012

There is always something like this.

http://www.knifemaking.com/product-p/js305.htm

KHDaily · Mar 6, 2012

Or something like this.

http://www.usaknifemaker.com/knife-scribe-magnum-with-18-carbide-scraper-p-2332.html

Cody Hofsommer · Mar 6, 2012

Grizzly has them for the best price I could find. $43. There made in China, but work just fine.... Definately worth the money.

ERIK KNIVES · Mar 24, 2012

I just got one of these and look forward to using it. Will even work with a taper.

http://www.riversidemachine.net/item598449.ctlg

I asked the owner of Knife and Gun supply about the quality and hardness of the scribe tip and he told me he's never had a complaint.

Don Nguyen · Mar 25, 2012

This is what I use.

http://www.amazon.com/Brown-Sharpe-...QROA/ref=sr_1_2?ie=UTF8&qid=1332648481&sr=8-2

Saw in a video for Entrek Knives and that's how he did it.

EDIT: It's a bit tricky to deal with tapers. I kind of just eyeball it at that point with the lines as a guide.

jawilder · Mar 25, 2012

Erik, I have one of those that was given to me. It is not the one from Riverside, but works the same way. It does a good job at keeping the lines in the middle but it won't work towards the tip as the guide rod closest to the tip comes off the blade before the scribe makes it all the way.

Just be sure to flip it to scribe both sides.
Jason

KHDaily · Mar 25, 2012

I also found this one on McMasterCarr the other day. It also has replacement scribes. It is a little cheaper then ones on the knife websites.

http://www.mcmaster.com/#2011A1

rick c · Mar 25, 2012

I hate to say it but go to Enco and get a 6" import height gage.Then find a local granite counter top shop.Bring some beer and get a sink cut out for a surface plate.

Rick

stevomiller · Mar 25, 2012

When height gauge is not available I've used a variation of s2f's. To create parallel lines .030" apart, use an old drill bit .030" thicker (or thinner) than the stock being used. Grind a sharp central point on the bit. Hold the stock flat on the surface plate, lay the bit on the plate and drag the point along the edge of the stock, flip the stock over, and repeat.