[Archive] Rotary took cutting bit for brass tube?

zobo1942:

Hey folks,

Does anyone know what kind of bit I’d need for a rotary tool to cut brass tubing?

Any advice/links would be much appreciated!

zobo1942

GRNDL:

Personally, I wouldn’t use a rotary tool to do it. You can buy specialized tube cutters from a hobby store - very cheap and can cut down to a few millimeters of tubing. Costs about $10.

Like this: http://www.hobbymasters.com/Kand-S-Tubing-Cutter.aspx

If you are hellbent on using your dremel, then I’d use a ceramic cutting wheel, but you’d have to be very careful with it and definitely wear some goggles. Something to hold the tube steady would be necessary. I can see all sorts of things going wrong with it. Uneven cut, the tube flying out of your hands, cutting wheel shattering…

The tube cutter is the best bet IMHO - precise, careful, smooth even cuts. Unless you have a lot of tubing to cut, this is the way to go.

Kera foehunter:

if you have a dremel this is what i use to cut metal figures

http://www.amazon.com/Anytime-Tools-DIAMOND-CUT-OFF-LAPIDARY/dp/B000FJLWNK

zobo1942:

Thanks for the advice, folks!

The ‘pipe cutter’ is an awesome idea, and I may go that route. Initially, I was thinking of using brass rod that had a square cross-section, and hence my thoughts about using Dremel, just to avoid having to go the hacksaw route.

However, I might be able to use round cross-section tubing, instead. I am making some removable wire joints for a stop motion animation puppet. A smaller gauge of brass tubing has the aluminum wire joint material glued to the inside of it, and this piece is nested inside a larger gauge piece of tubing. The square cross-section material would stop the parts from twisting, but that may be solved by drilling a hole and putting a very small bolt through it. The Dremel bit might be something I need to adjust the length of the bolt…

Thanks for the input - it is much appreciated!!

Abecedar:

if you have a dremel this is what i use to cut metal figures
http://www.amazon.com/Anytime-Tools-DIAMOND-CUT-OFF-LAPIDARY/dp/B000FJLWNK

Kera foehunter
i've used these bits before, but only getting into a drawer lip with tight squeeze to trim. hard metal and due to awkward position and twisting they did shatter once But a good tool never-the-less

zobo1942:

if you have a dremel this is what i use to cut metal figures
http://www.amazon.com/Anytime-Tools-DIAMOND-CUT-OFF-LAPIDARY/dp/B000FJLWNK

Kera foehunter
I went to the local model store and sadly, they had no pipecutters. However, the owner did manage to sell me a saw and a mitre box which works pretty well. Attached is a picture of the prototype removable 'elbow' joint made of aluminum I made.



However, I'm planning on making some other joints which may be about 50% of the size of this one. Kera, have you ever used your dremel as a micro-tablesaw? I ask because some of the parts I need to make are going to be three or four millimeters long... and I need to make six of them... per finger! And, all the cuts need to be square. Using the hand saw is OK, but mechanizing it would save me time and effort, I think.

Thanks!

zobo1942:

if you have a dremel this is what i use to cut metal figures
http://www.amazon.com/Anytime-Tools-DIAMOND-CUT-OFF-LAPIDARY/dp/B000FJLWNK

Kera foehunter
I went to the local model store and sadly, they had no pipecutters. However, the owner did manage to sell me a saw and a mitre box which works pretty well. Attached is a picture of the prototype removable 'elbow' joint made of aluminum I made.



However, I'm planning on making some other joints which may be about 50% of the size of this one. Kera, have you ever used your dremel as a micro-tablesaw? I ask because some of the parts I need to make are going to be three or four millimeters long... and I need to make six of them... per finger! And, all the cuts need to be square. Using the hand saw is OK, but mechanizing it would save me time and effort, I think.

Thanks!


zobo1942
EDIT: can anyone find a link for a Canadian seller of the k&s tube cutter? I cannot find one anywhere!

GRNDL:

@Zobo_1942

Check your PMs, sir. :slight_smile:

From the pics, its looking like you’re building some kind of scale arm and hand. Have you considering using plastic rod/tube for the fingers? Easier to cut, cheap ($2 will get you a lot of fingers, +test cuts), comes in circular, triangular, square, hexagonal cross sections…??

Easier cuts = better precision, less waste, no weird tools. :slight_smile:

Kera foehunter:

Zorbo No i haven’t used a dremel as a micro-tablesaw?

Could you tell me How ?? before i try and get cut Please