precision axial cutting of thin-walled brass tube

diy888

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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mae-ling

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?

diy888

The length is going to be 12mm (1/2").

Fix'n it

band saw

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joecaption

A slitting saw is how they would do it on a commercial level.
What is it your going to be doing with it?

ddawg16

x2

Make a jig that will hold it perfectly vertical.

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Lavid2002

How many do you have to make? I'd just put it in a vice and slice it with an angle grinder.

7echo

.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.

sdsester

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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diy888

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.

diy888

Thanks for the dowel suggestion.

diy888

Only about a dozen or so. Angle grinder seems sort of unwieldy (at least in my hands).

diy888

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?

DexterII

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.

mae-ling

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