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-   -   Tool question -- cutting the seatpost slot in the seat tube (http://www.bikeforums.net/framebuilders/939950-tool-question-cutting-seatpost-slot-seat-tube.html)

David Tollefson 03-25-14 09:32 AM

Tool question -- cutting the seatpost slot in the seat tube
 
Okay, I've been looking around the 'net to find that cutter for putting the seatpost slot at the top of the seat tube. Only thing I've come up with is a "keyseat cutter", which isn't exactly right.

Any one wanna clue me in to the actual name of that cutter, and where I might be able to find one?

Thanks!

unterhausen 03-25-14 10:52 AM

for what machine? Slitting saw is one term. I've seen people use end mills, dremels, and hacksaws

David Tollefson 03-25-14 10:56 AM

Quote:

Originally Posted by unterhausen (Post 16609832)
for what machine? Slitting saw is one term. I've seen people use end mills, dremels, and hacksaws

Slitting saw looks like the answer I was looking for -- I was planning on using it in a drill press and bolting a sliding carriage onto the table (so as to make it a ghetto vertical mill).

JohnDThompson 03-25-14 03:41 PM

I just use a hacksaw with two blades mounted to cut a wider slot.

fietsbob 03-25-14 04:33 PM

and pre drill a hole to cut into with the stacked hacksaw blades ..

Andrew R Stewart 03-25-14 11:04 PM

Since I like a wider slot the some, i use one blade but two cuts. Andy.

reddog3 03-25-14 11:55 PM

"Slitting saw" is the cutter you're looking for- but... mounting it in arbor in a drill press, then ficturing the seat tube on the drill press table to cut a "good" slot will be a PIA and your result may not be what you're looking for.

Drill your 'pucker hole" them mark both sides of the cut with some tape. Use a hacksaw, and finish the slot to width with a file.

I, like Andy prefer a bit wider slot, but I cut the slot originally with two blades, and fine tune the width with a rotary tool. If a Dremel is all you have it will work but there are better tools available. Takes just a few minutes.

MassiveD 03-26-14 02:39 AM

Dremel with an abrasive disc, preferably a fiberglass one, cuts like a waterjet, but freehand. They wear fast, and break easily if pinged, but they cut really well.

I have a mill, so that is what I use.

Sounds like you may not quite have the gear to use a slitting saw, but that is what you are looking for. They are all over ebay, and they also can be found on:

Plain Metal Slitting Saws - high speed steel - 2-1/2 to 8 inch diameters


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