Rotisserie design 101, moment resisting connection at the pivot shaft? |
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Rotisserie design 101, moment resisting connection at the pivot shaft? |
bondo |
Apr 10 2007, 10:14 PM
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#1
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
I'm in the midst of over-designing a rotisserie.
The basic idea of a rotisserie is that the bolt on parts that go where the bumpers mount extend a shaft from the center, which acts as a pivot. What I need to know is, is a 914 strong enough that those "shafts" coming out from the front and rear just need to be held up off the ground, or do they also need to be held straight and level? I basically need to know what forces are placed on the uprights... whether it's just a vertical force, or a vertical force plus moment. |
VaccaRabite |
Apr 11 2007, 06:38 AM
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#2
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
If you are building one, keep it simple instead of complex.
Eastwood's twirler is complex, as it has to work for a lot of different cars. it sells, if I remember correctly, for around $1200. I built mine for $250. You do need a steel bar that goes across the bottom of the structure for stability. I would not make it adjustable height. Make a fixed height and look at some of the lifting mechanisms that folks here have made to raise and lower thier tubs on it. Frankly, a stripped 914 tub is light enough that 2 guys can lift it pretty easy. Zach |
bondo |
Apr 11 2007, 04:38 PM
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#3
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
If you are building one, keep it simple instead of complex. Haha... I'm building what may be the most complex rotisserie ever made. Hint: binding will not be a problem. (IMG:style_emoticons/default/biggrin.gif) The total cost will end up being around $200-$300, but I did get much of the materials for free. |
John |
Apr 11 2007, 05:35 PM
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#4
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
If you are building one, keep it simple instead of complex. Haha... I'm building what may be the most complex rotisserie ever made. Hint: binding will not be a problem. (IMG:style_emoticons/default/biggrin.gif) The total cost will end up being around $200-$300, but I did get much of the materials for free. Cool no binding. Did you put a gearbox with a crank at one end and a big bearing at the other end to precision turn the car? We need pics. I have seen some pretty complex fixtures at manufacturers facilities where one man can turn over a very large weldment with the use of a gearbox at one end of a sort of rotisserie. |
bondo |
Apr 11 2007, 06:24 PM
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#5
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
If you are building one, keep it simple instead of complex. Haha... I'm building what may be the most complex rotisserie ever made. Hint: binding will not be a problem. (IMG:style_emoticons/default/biggrin.gif) The total cost will end up being around $200-$300, but I did get much of the materials for free. Cool no binding. Did you put a gearbox with a crank at one end and a big bearing at the other end to precision turn the car? We need pics. I have seen some pretty complex fixtures at manufacturers facilities where one man can turn over a very large weldment with the use of a gearbox at one end of a sort of rotisserie. No pics until it's done... (IMG:style_emoticons/default/biggrin.gif) But I will say that it involves part of a P-38 Lightning. (IMG:style_emoticons/default/happy11.gif) |
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