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Old 08-29-2012, 07:30 PM   #1
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precision axial cutting of thin-walled brass tube


I have some thin-walled (0.015") brass tube and am wondering how to cut it axially, without bending it or creating lots of burrs, to end up with something that looks like the picture below.
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Old 08-29-2012, 07:48 PM   #2
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precision axial cutting of thin-walled brass tube


How about a jig on the table saw? The jig would gently sandwich the sides and really hold it on the ends.
How long of pieces are we talkin?

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Old 08-29-2012, 08:19 PM   #3
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precision axial cutting of thin-walled brass tube


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Originally Posted by mae-ling View Post
How about a jig on the table saw? The jig would gently sandwich the sides and really hold it on the ends.
How long of pieces are we talkin?
The length is going to be 12mm (1/2").
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Old 08-29-2012, 09:45 PM   #4
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precision axial cutting of thin-walled brass tube


band saw
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Old 08-29-2012, 10:26 PM   #5
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precision axial cutting of thin-walled brass tube


A slitting saw is how they would do it on a commercial level.
What is it your going to be doing with it?
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Old 08-29-2012, 10:34 PM   #6
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precision axial cutting of thin-walled brass tube


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band saw
x2

Make a jig that will hold it perfectly vertical.
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Old 08-30-2012, 01:26 AM   #7
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precision axial cutting of thin-walled brass tube


How many do you have to make? I'd just put it in a vice and slice it with an angle grinder.
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Old 08-30-2012, 07:09 AM   #8
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precision axial cutting of thin-walled brass tube


.015 is pretty thin and doing it without bending it is a problem.

I might try a jig on a bandsaw, depending on the diameter and length.

How precise does the slit need to be?

I might have a sample water jetted and see how it comes out.


How many and how precise are going to help decide how it gets done.
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Old 08-30-2012, 07:25 AM   #9
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precision axial cutting of thin-walled brass tube


Might stabilize it with a dowel down the center.

Water jet or laser cutting it would be possibilities if you send it out.
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Old 08-30-2012, 02:58 PM   #10
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precision axial cutting of thin-walled brass tube


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Originally Posted by joecaption View Post
A slitting saw is how they would do it on a commercial level.
What is it your going to be doing with it?
I am using it as a sleeve tensioner between some shafting and a v-belt idler pulley whose bore is a smidgen too large for the shaft.

I've managed to cut a section with a tube cutter and then axially with a small hack saw but it did bend, the cut is not straight and clean, and I'm going to have to try to clean it up with a file. It works as intended, sort of, though the dent creates some clearance issues--have to really force the idler pulley onto it.

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Old 08-30-2012, 02:59 PM   #11
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precision axial cutting of thin-walled brass tube


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Might stabilize it with a dowel down the center.

Water jet or laser cutting it would be possibilities if you send it out.
Thanks for the dowel suggestion.
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Old 08-30-2012, 03:00 PM   #12
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precision axial cutting of thin-walled brass tube


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Originally Posted by Lavid2002 View Post
How many do you have to make? I'd just put it in a vice and slice it with an angle grinder.
Only about a dozen or so. Angle grinder seems sort of unwieldy (at least in my hands).
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Old 08-30-2012, 03:03 PM   #13
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precision axial cutting of thin-walled brass tube


Is there a kind of jig saw blade that wouldn't wander around the face of the tube but would bite right in? Something really fine and made for metal?
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Old 08-30-2012, 04:20 PM   #14
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precision axial cutting of thin-walled brass tube


At .015" thickness, I would at least take a shot at a simple jig, basically a dowel with a stop to slip the sleeves over, clamped such that I had a guide parallel to the dowel, and try slicing it with a utility knife.
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Old 08-30-2012, 05:50 PM   #15
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precision axial cutting of thin-walled brass tube


Dowel is Genius idea!
Don't think a band saw will work as he wants a slit not 2 pieces.

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