How Are Rotors Made?- Mtbr.com
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  1. #1
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    How Are Rotors Made?

    Are they extruded and sliced?
    Or are the punched out of of sheet steel? Maybe cut with an aqua-jet?
    Last edited by highdelll; 11-09-2010 at 09:59 PM.
    Honestly... ahh I give up

  2. #2
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    Quote Originally Posted by highdelll
    Are they extruded and sliced?
    Or are the punched outo of sheet steel? Maybe cut with an aqua-jet?
    I'd think the latter, but aqua-jet? I thought it's light saber

  3. #3
    How much does it weigh?
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    Punch Press.
    Laser Cut.
    Water Cut.

  4. #4
    All fat, all the time.
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    I file mine out by hand out of a solid piece of metal.

  5. #5
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    Quote Originally Posted by Shark
    I file mine out by hand out of a solid piece of metal.
    I thought i was the only one!

  6. #6
    Never trust a fart
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    I gnawed mine out of a solid piece of billet.

  7. #7
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    Quote Originally Posted by frdfandc
    I gnawed mine out of a solid piece of billet.
    That's AM
    Honestly... ahh I give up

  8. #8
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    I make mine with my bare hands.
    "It looks flexy"

  9. #9
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    Quote Originally Posted by Borgschulze
    Punch Press.
    Laser Cut.
    Water Cut.
    So is this THE way? got any links?
    Honestly... ahh I give up

  10. #10
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    Honestly... ahh I give up

  11. #11
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    I whittle mine out of bone then stick them under my pillow until they turn to metal.

    So far, not working.
    Don't you hate it when a sentence doesn't end the way you think it octopus?

  12. #12
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    Rotors are usually laser cut from a sheet steel and then ground to flatness on a special machine ( you can see the results on a fresh rotors, they seem to be brushed somewhat )

  13. #13
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    i used a water jet, then cooked it in an oven. worked just fine....although i only ever made one, and only used it a few times...
    what would rainbow unicorn do?

  14. #14
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    http://www.pinkbike.com/video/17524/

    shows how disks are made

  15. #15
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    Cool!

  16. #16
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    Nice (and now embedded) the whole thing is interesting, but if you want to go straight to rotors, it's @ 6:20
    <object width='500' height='288'><param name='allowFullScreen' value='true' /><param name='allowScriptAccess' value='always' /><param name='movie' value='http://www.pinkbike.com/v/17524/l/' /><embed src='http://www.pinkbike.com/v/17524/l/' type='application/x-shockwave-flash' width='500' height='288' allowFullScreen='true' allowScriptAccess='always'></embed></object>
    Honestly... ahh I give up

  17. #17
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    Man, programming a CNC is easy/hard if you want to optimize everything. All those parts to shake out at the end (if you've done laser you know about shaking parts out!).
    "It looks flexy"

  18. #18
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    Quote Originally Posted by gticlay
    Man, programming a CNC is easy/hard if you want to optimize everything. All those parts to shake out at the end (if you've done laser you know about shaking parts out!).
    Most of us haven't - expound?
    Honestly... ahh I give up

  19. #19
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    Quote Originally Posted by highdelll
    Most of us haven't - expound?
    Most parts you have to tab in so they don't come loose and catch on the laser head while it's making other parts. So afterward you have to take the big sheets of parts and shake all the parts out. Depending on how thick the tab is, it can be a lot of work to shake a huge sheet of metal until the parts come out.
    "It looks flexy"

  20. #20
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    ah...
    Honestly... ahh I give up

  21. #21
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    Quote Originally Posted by gticlay
    Most parts you have to tab in so they don't come loose and catch on the laser head while it's making other parts. So afterward you have to take the big sheets of parts and shake all the parts out. Depending on how thick the tab is, it can be a lot of work to shake a huge sheet of metal until the parts come out.
    Yep. I work for a company in Salt Lake making rock climbing and skiing gear. We have a pretty huge laser cutter, and let me tell you; Crampons are the worst things on EARTH to cut. All the points and tabs make it super hard to shake them out of an 8'x4' sheet. And afterward, the de-drossing and cleaning of the edges and points... not a fun job. But it is a super cool machine. We've cut all sorts of toys on it, and hopefully I'll be able to make me some custom rotors one of these days.
    tangaroo: What electrolytes do chicken and turkey have again?
    rck18: All of them, because they're meat.

  22. #22
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    Anyone know what alloys of stainless steel the brakes are made of? If I can find out what kind and how it should be heat treated, I'll be all over the custom brakes. Might even do custom orders for cheap too...
    tangaroo: What electrolytes do chicken and turkey have again?
    rck18: All of them, because they're meat.

  23. #23
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    Quote Originally Posted by charging_rhinos
    Anyone know what alloys of stainless steel the brakes are made of? If I can find out what kind and how it should be heat treated, I'll be all over the custom brakes. Might even do custom orders for cheap too...
    I only use 5150 and A-420 alloys
    Honestly... ahh I give up

  24. #24
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    Quote Originally Posted by brake-stuff
    We laser cut our brake discs (see link below).
    http://www.brake-stuff.de/stuff.html

    Torsten
    Supercool designs and laser cutter video!
    Whoever invented the bicycle deserves the thanks of humanity.
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  25. #25
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    Quote Originally Posted by uzurpator
    Rotors are usually laser cut from a sheet steel and then ground to flatness on a special machine ( you can see the results on a fresh rotors, they seem to be brushed somewhat )
    the special machine is a blanchard grinder.in case anyone cares.

  26. #26
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    I use also A-420 alloys.

  27. #27
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    Very interesting ? HighDell, thanks for posting it. TO BrakeStuff, is that video slowed down, or does it really take 6 minutes to cut out a rotor? Curious as to me that seems quite a bit of time, even for a complex design like that one on a lazer. Can you explain the reasoning behind the programing path we saw in the video, didn't seem very effiecient to me, made the lazer move around way more than needed IMHO? I'm no engineer or understand this stuff or heat generated causing warping etc, so very curious if the path is because of this or wasn't well thought out for effieciency?

    Quote Originally Posted by brake-stuff
    We laser cut our brake discs (see link below).
    http://www.brake-stuff.de/stuff.html

    Torsten
    One day your life will flash before your eyes, will it be worth watching??

  28. #28
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    Quote Originally Posted by charging_rhinos
    Yep. I work for a company in Salt Lake making rock climbing and skiing gear. We have a pretty huge laser cutter, and let me tell you; Crampons are the worst things on EARTH to cut. All the points and tabs make it super hard to shake them out of an 8'x4' sheet. And afterward, the de-drossing and cleaning of the edges and points... not a fun job. But it is a super cool machine. We've cut all sorts of toys on it, and hopefully I'll be able to make me some custom rotors one of these days.
    I've been trying to get a job there for ages, need any manufacturing engineers?
    Don't you hate it when a sentence doesn't end the way you think it octopus?

  29. #29
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    I now appreciate my crampons that little bit more.
    Why would I care about 150g of bike weight, I just ate 400g of cookies while reading this?

  30. #30
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    Quote Originally Posted by zebrahum
    I've been trying to get a job there for ages, need any manufacturing engineers?
    I'm a mfg engineer myself Not sure if there are any openings right now, but if there are, they'll be posted on the website. It is a very hard place to get into unless you know people that work there. That's how I got into the place. It's a pretty tight-knit family, but they are a welcoming bunch. I'd definitely look out this winter for people flying up the backcountry skin tracks at ridiculous speeds around Alta and Snowbird in the very early mornings. Chances are they are part of the crew. Do a little schmoozing and you'll be golden in no time. Bringing beer also helps...


    And to those that gave me their secret alloy stuff, thanks very much. I'll start looking into heat treatment right away, then it's off to play with Solidworks.
    tangaroo: What electrolytes do chicken and turkey have again?
    rck18: All of them, because they're meat.

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