how do you C notch your tubing
 

I'm trying to build a tube scaler I was wondering what everyone uses to C notch their tubing. I am planning on using 3/16 brake line and brazing. And what do you use to clean up the slag from brazing?

i was gonna try one out of 1/4", i bought some 1/4 bits for my dremel thinking i could easily notch em, but nope. i think a how to i read though notching with the 3/16 wasnt as important cause when you braze it fills it in, that you could just kinda v-notch it. with scale tubers on the rise it would be nice if they came out with some scale size tubing tools....

Use the corner of a grinding wheel.

i use a 3/32 drill bit and drill out the center or what size bit you need,depending on what size tubing,if the fishmouth is too big just smash it with a hammer or grind away what you dont need.works pretty good.
i recently was reminded about this technique from o5tacoma. commonly used for making tube chassis' for drag racing.if you dont have a tube notcher.

So you figured that out too?"thumbsup" It works great.

Mill, Dremel with the tiny sanding drum, rat tail file.

If you see here there is many ways to do it. Also if you use 3/16 solid rod and MIG weld there is no need to notch anything. Since both metals are melted at the joint.

It's best to make a decent fishmount so you get a good fit for brazing.

I've actually found the fastest way to fishmouth is with an abrasive 7" steel blade I have in a table saw. After that I hit it a bit with a rat tail round file.

If you don't cook the flux too much it comes off pretty easy with some Scotchbrite, or you may have to sand a bit if it's gotten too hot. If you wait about 30-60 secs for the joint to cool a little and then douse it in water, a fair amount of time a lot of it will wash off.

Jay