In the wild world of carbon fiber, it is not so different than the aforementioned Anderson method.
1. Mark my holes (I use 3 slots)
2. Drill
3. Use a cut off wheel for the slot
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In the wild world of carbon fiber, it is not so different than the aforementioned Anderson method.
1. Mark my holes (I use 3 slots)
2. Drill
3. Use a cut off wheel for the slot
I do all of mine in the horizontal mill, after I've done the bb cope, so I know what parallel to that plane is.
1- use the 4" diamond slitting saw to make slots, I like two slots on the sides of the st- keeps all the material at the most highly stressed portion nice and contiguous.
2- turn tube 90 degrees
3- use the straight shank section of the 4mm diamond hole saw to locate the slot on both sides of the st (or just keep the tube block clamped on the tube through doing the bb cope, bottle boss drilling and then this)
4- run 4mm hole through both sides of the tube (tape and slow, natch)
5- small amount of 200 grit love for those chamfers nobody but you will ever know about.
This takes me about 2 minutes, mostly changing from the slitting saw to the hole saw (collets, they're great for holding, not for quickly changing.)
Being cheap in Cinemascope:
http://farm6.staticflickr.com/5483/1...e7d41dc6e2.jpg
Yes
Attachment 63213
Dug through the video files on the laptop and posted this up to help with a visual option...
https://www.youtube.com/watch?v=rVPzrB2kYhc
Cut off wheel and conical bit. One of these days I will rig up a dedicated machine, but in the mean time this is easy peasy*, fast, and quite affordable.
https://farm4.staticflickr.com/3815/...31ea516d_n.jpg
I should note that it's also easy peasy to mess it up royally, and that a certain amount of practice and muscle memory go a long way. As with most things.
I hate to bump a thread up, but what is the standard sizing of a seat tube slot... If considering a best practice approach?
Matt,
In the video noted above, the slot is .125"
I have found this the best width to meet my needs in all materials (steel, ti, aluminum) as it is of sufficient width to allow for compensation of stretch as the frame fatigues through the years and hammer fisted mechanics torque it well beyond it's intended requirements.
cheers,
rody