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09-07-2020, 09:04 AM | #1 |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| 3d printed differentials
Hey guy's I'm trying to save weight on my 12s race 6x6 and I came up with the idea 3d printed differential gears that will be made of nylon x or polycarbonate filament thoughts? Sent from my SM-G986U using Tapatalk |
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09-07-2020, 12:03 PM | #2 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,482
| Re: 3d printed differentials
I think its going to fail very easily. I predict you'll get about 12" before these grenade. I'd recommend looking for weight savings elsewhere. |
09-07-2020, 01:58 PM | #3 |
Quarry Creeper Join Date: Jan 2008 Location: Edmonton, AB
Posts: 443
| Re: 3d printed differentials
Can’t say I would recommend that venture either. Sent from my iPhone using Tapatalk |
09-07-2020, 04:04 PM | #4 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
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09-07-2020, 04:05 PM | #5 |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials |
09-07-2020, 04:15 PM | #6 |
Quarry Creeper Join Date: Jan 2008 Location: Edmonton, AB
Posts: 443
| 3d printed differentials Why? Plastic would deform quickly leading to failure. That would be the last place I would look to reduce rotating mass and rotational drag. If you haven’t done so already I would get rid of the transmission and make it direct drive with a buggy centre diff or something of the sorts. Changing a diff to a 3D plastic would not cross my mind like ever.. it’s just a bad idea. But what do I know, I’ve only been a machinist for 12years Sent from my iPhone using Tapatalk Last edited by RockCrawlingKid; 09-07-2020 at 04:18 PM. |
09-07-2020, 04:28 PM | #7 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
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09-07-2020, 04:43 PM | #8 | |
Quarry Creeper Join Date: Jan 2008 Location: Edmonton, AB
Posts: 443
| Re: 3d printed differentials Quote:
Try it then. Unless you can hold tolerances less than .0015in on your printer and can print a material that’s stronger than aluminum you’ll only be making things worse... a lot worse. Getting your plastic gears to mesh correctly and have less friction than a properly meshed hardened steel gear set will be far to much work for a substandard result.. Porsche or whoever has spent billions on R and D into 3D printing and I doubt anyone on this forum has a printer that can do what your thinking let alone have any success Sent from my iPhone using Tapatalk | |
09-07-2020, 04:46 PM | #9 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
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09-07-2020, 04:51 PM | #10 | |
Quarry Creeper Join Date: Jan 2008 Location: Edmonton, AB
Posts: 443
| Re: 3d printed differentials Quote:
Prove me wrong! I just know I’ve replaced every plastic gear/ rotating assembly piece that’s ever came on an rc and replaced it with the appropriate aluminum or hardened steel piece. Rotational friction of your current set up is what you need to reduce. Sent from my iPhone using Tapatalk | |
09-07-2020, 04:53 PM | #11 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
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09-07-2020, 06:08 PM | #12 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,482
| Re: 3d printed differentials
lets not forget you've said this will be on 12S, thats a tall fricken order that even the metal gears may struggle with. If the gears can hold up they'll be fighting friction and heat and I can see them fusing together if they can hold up for a while. I'd love to be proven wrong, that would be cool. But it looks like this could be one of those "what do you guys recommend so I can ignore it" type threads. Much of what Porsche and other big manufactures use for printing is on super high dollar machines. Do you have a link to some info on their plastic gears? I am curious. I do tons of 3D printing BTW so dont take me as a 3D printed part hater. Last edited by HumboldtEF; 09-07-2020 at 06:17 PM. |
09-07-2020, 06:21 PM | #13 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
Porsche 3d printed pistons https://www.cnet.com/google-amp/news...or-911-gt2-rs/ 3d printed differentials https://youtu.be/7kd4ZLn-Ouw 3d printed lifting a car https://youtu.be/Z2XkdLy9pxE And this tread was that I wanted to know what u guys thought about it not recommendations but still open to it no hate. Sent from my SM-G986U using Tapatalk | |
09-07-2020, 06:35 PM | #14 | |
Pebble Pounder Join Date: Dec 2013 Location: Canada
Posts: 102
| Re: 3d printed differentials Quote:
Companies like Porsche are using multimillion dollar cutting edge of technology machines that might not be available to the average person P.S. the guy who 3d printed a car different said a plastic diff was a bad idea at 8:07(minute)in the video Last edited by jcanuck; 09-07-2020 at 06:39 PM. | |
09-07-2020, 06:43 PM | #15 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
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09-08-2020, 04:59 AM | #16 |
Rock Crawler Join Date: Mar 2016 Location: Zagreb, Croatia
Posts: 747
| Re: 3d printed differentials
Where the hell do you race a 12s 6x6!?
|
09-08-2020, 08:13 AM | #17 |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials |
09-08-2020, 02:30 PM | #18 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,482
| Re: 3d printed differentials
hmmmm I hope your not a betting man. Last thing I'll point out is the size of the output shaft on the pinion, is a meager 5mm diameter and has a 3mm hole running through it. this area will be extrememly weak. The axle shafts will also need something to key the tangs into and plastic wont cut it. so at the very minumum you'll need metal outputs as well as a metal spool at which point..... why not just keep the metal gears. Monthly Mayhem might have inspired this and if so I say great, go have some fun. But if you're trying to be competitive the only thing getting embarassed at the track will be you, no offense I'm just being realistic. Just look at how much the TRX6 struggles with going straight and staying off its roof on a mere 4S-6S https://www.youtube.com/watch?v=Eg9b...ilder%27sGuild https://www.youtube.com/watch?v=d0Zi...=HarleyDesigns Last edited by HumboldtEF; 09-08-2020 at 02:37 PM. |
09-08-2020, 02:54 PM | #19 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
Sent from my SM-G986U using Tapatalk Last edited by jemelumadu2; 09-08-2020 at 02:59 PM. | |
09-08-2020, 03:00 PM | #20 | |
Pebble Pounder Join Date: May 2020 Location: US
Posts: 100
| Re: 3d printed differentials Quote:
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