07-21-2011, 01:42 PM | #1 |
Pebble Pounder Join Date: Apr 2011 Location: El Paso
Posts: 191
| 7075 aluminum vs delrin
Does anybody have a weight comparison of 7075 aluminum to delving thanks
Last edited by LUNAticCrawlingCrew; 07-21-2011 at 03:45 PM. |
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07-21-2011, 02:02 PM | #2 |
Rock Stacker Join Date: Feb 2010 Location: Rome,Italy
Posts: 90
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7075 2810 kg/m3 delrin 1420 kg/m3 almost exactly half |
07-21-2011, 02:57 PM | #3 |
RCC Addict Join Date: Oct 2008 Location: Tyler, TX
Posts: 1,619
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Of course 7075 aluminum is much stronger than delrin. The tensile strength of 7075 is at least 55000 psi depending on temper and what not. Delrin has a 9000 psi tensile strength. |
07-21-2011, 03:25 PM | #4 |
I wanna be Dave Join Date: Dec 2006 Location: Goin broke losing weight.....
Posts: 2,262
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it is heavier, though you can use thinner material with the 7075 as compared to delrin for links, tie rods, etc
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07-21-2011, 03:51 PM | #5 |
Pebble Pounder Join Date: Apr 2011 Location: El Paso
Posts: 191
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thanks i was thinking about making a moonbuggy chassis out of aluminum if mine ever breaks so i was thinking i would use 7075 and ill just make it thinner
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07-21-2011, 03:52 PM | #6 |
Rock Crawler Join Date: Jul 2009 Location: greeley
Posts: 545
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07-21-2011, 07:26 PM | #7 |
Newbie Join Date: Apr 2011 Location: Victoria
Posts: 30
| I built my chassis out of an unknown alloy aluminum scrap I had laying around. The problem I have is when it takes a big tumble, like multiple cartwheel type tumble, the chassis can become deformed. I'm wondering if Delrin is much more resilient in this way that it would just absorb some of the impact and return to it's intended shape after a tumble? Or do I just need to design my chassis better so it won't bend in a tumble?
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07-21-2011, 08:12 PM | #8 |
I wanna be Dave Join Date: Dec 2006 Location: Goin broke losing weight.....
Posts: 2,262
| Absolutely, i have never run aluminum on go fasts. But crawlers are a whole nuther animal. I prefer alluminum for upper links and tie rods. Delrin for lowers because its so slick.
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07-21-2011, 08:57 PM | #9 | |
RCC Addict Join Date: Oct 2008 Location: Tyler, TX
Posts: 1,619
| Quote:
If you are going to weld it you need 6061 though as 7075 does not weld well at all. DMG does a lot of work with aluminum tube chassis and has had great success with them. Many people here run aluminum DMG tube chassis and a really nice bonus is that they are extremely light compared to steel. Aluminum us great for go fast rigs it just needs to be high quality machined parts from 6061 or 7075. Not the cast garbage most manufacturers sell. I beat the snot out of my 7075 stampede breaking well over 70 mph and not bending anything. | |
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