RCCrawler Forums

fwilly · 05-28-2009, 07:07 PM

My goal was to make a tuber with a really low COG without being a belly dragger.

Its made from 3/16 delrin rod, bent with a heat gun, and welded with a soldering iron. I made a lot of test welds from scraps of rod, and I could get them pretty strong. When it is finished, I will heat it up in an oven to try and normalize the plastic. My test welds that I didn't heat up, broke very easily, just outside the weld joint. When I heated them up with a heat gun, they took much more effort to break.

Its not finished, but whats there weighs 38 grams. My painted un-trimmed mini Grapler body weighs 32g.

rex cars · 05-28-2009, 07:14 PM

way to think outside of the box. looks good so far. Are you using filler rod, or going for a fusion weld?

ROCKEDUP RICKY · 05-28-2009, 07:27 PM

If you put the motor inside the chassis and get rid of the frame work around the motor it would be a lot better ,don't you think.

J/K

Look cool, Whats the weight of that thing.

Do you know what pitch the pinion gear on a losi is.

fwilly · 05-28-2009, 07:32 PM

I'm using the iron to notch the rod, which leaves some excess material that works well for filller. I'm not familiar with fusion welding. What I am doing is tacking the joint, and then stabing the chisel tip soldering iron into the joint, and then work the molten material back into the hole I just made. I stab it on both sides, and then in the corners. I'm using a Hako iron, turned down pretty low. I have found that the lower temp I can use to make the joint, the more durable it is, but too low, and the molten plastic sticks to the iron too much, and it is impossible to work with.

fwilly · 05-28-2009, 07:35 PM

It weighs 38g at this point

I think the gears are 48p

The Real Dogman · 05-29-2009, 04:10 AM

Is there anyway you can make a short video showing the welding process. I am hugely interested here..

2500hdon37s · 05-29-2009, 05:49 AM

thats prety freeking sweet and light tuber! bet when you roll over it slides too haha. thats just sawsome man

HomerJ · 05-29-2009, 07:30 AM

MAKE SURE YOU ARE IN A WELL VENTILATED AREA!!! Melting Delrin like that puts out some horridly bad fumes! Other than that looks good man!!

fwilly · 05-29-2009, 08:14 AM

I will try to make a video

the fumes are indeed very nasty

wheelhead4x4 · 05-29-2009, 08:15 AM

Would you be will to make more for the right $$

fwilly · 05-29-2009, 08:35 AM

Quote:

Originally Posted by wheelhead4x4

Would you be will to make more for the right $$

Probably not. It takes a lot of time, so it would be a lot of $$, and I have no idea how durable it will be.

wheelhead4x4 · 05-29-2009, 08:37 AM

Quote:

Originally Posted by fwilly

Probably not. It takes a lot of time, so it would be a lot of $$, and I have no idea how durable it will be.

Ok just thought i would ask. Mite try it myself then.

binaryterror · 05-29-2009, 09:50 AM

The fumes are formaldehyde...deadly not nasty.

HC Rc Guy · 05-29-2009, 09:53 AM

Hey guys, I would not recommend melting delrin. Delrin does contain some formaldehyde, which can be released and cause you some problems. Delrin dust is also something to watch out for. Read all you can before you start spending too much time doing it.

There are some good plastic 2part epoxies out there if you're willing to look.

fwilly · 05-29-2009, 10:23 AM

If the fumes, AND dust are deadly, I'm probably already dead...

At lower temps, where the welding seems to work best, there are much fewer fumes. My first welds, done at higher temps, put off a lot of fumes, and were very weak. Once the plastic starts bubling (boiling?) the weld seems to be ruined.

I just read a bit on formaldehyde, and it does seem bad. As a cancer survivor, I especially don't like the carcinogen part

Definitely gonna finish this project with better ventilation.

I'm thinking I should name this project "The Certain Death Tuber"

Soup Man · 05-29-2009, 11:29 AM

Carcinuber

fwilly · 05-29-2009, 11:55 AM

LOL I like that. Maybe throw a "t" in there

carcinotuber

Kamikaze · 05-29-2009, 08:43 PM

My dog eats the chips off the floor every day. Then everyday he pukes them up.

The Real Dogman · 05-29-2009, 08:49 PM

ol I have 2 cats that seem to love this stuff. Can't keep them out of it!!

BTW Congrats Jeff..

Quote:

Originally Posted by Kamikaze

My dog eats the chips off the floor every day. Then everyday he pukes them up.

05-28-2009, 07:07 PM	#1
fwilly Pebble Pounder Join Date: Dec 2004 Location: Farmington NM Posts: 103	Plastic Tuber MRC My goal was to make a tuber with a really low COG without being a belly dragger. Its made from 3/16 delrin rod, bent with a heat gun, and welded with a soldering iron. I made a lot of test welds from scraps of rod, and I could get them pretty strong. When it is finished, I will heat it up in an oven to try and normalize the plastic. My test welds that I didn't heat up, broke very easily, just outside the weld joint. When I heated them up with a heat gun, they took much more effort to break. Its not finished, but whats there weighs 38 grams. My painted un-trimmed mini Grapler body weighs 32g. Attached Images

05-29-2009, 10:23 AM	#15
fwilly Pebble Pounder Join Date: Dec 2004 Location: Farmington NM Posts: 103	If the fumes, AND dust are deadly, I'm probably already dead... At lower temps, where the welding seems to work best, there are much fewer fumes. My first welds, done at higher temps, put off a lot of fumes, and were very weak. Once the plastic starts bubling (boiling?) the weld seems to be ruined. I just read a bit on formaldehyde, and it does seem bad. As a cancer survivor, I especially don't like the carcinogen part Definitely gonna finish this project with better ventilation. I'm thinking I should name this project "The Certain Death Tuber" Last edited by fwilly; 05-29-2009 at 10:28 AM.

05-28-2009, 07:14 PM	#2
rex cars Pebble Pounder Join Date: Dec 2008 Location: Tomball, Tx Posts: 168	way to think outside of the box. looks good so far. Are you using filler rod, or going for a fusion weld?

05-28-2009, 07:27 PM	#3
ROCKEDUP RICKY Old guy Join Date: Jan 2007 Location: Northwest Arkie-saw and we got ROCKS! Posts: 7,548	If you put the motor inside the chassis and get rid of the frame work around the motor it would be a lot better ,don't you think. J/K Look cool, Whats the weight of that thing. Do you know what pitch the pinion gear on a losi is.

05-28-2009, 07:32 PM	#4
fwilly Pebble Pounder Join Date: Dec 2004 Location: Farmington NM Posts: 103	I'm using the iron to notch the rod, which leaves some excess material that works well for filller. I'm not familiar with fusion welding. What I am doing is tacking the joint, and then stabing the chisel tip soldering iron into the joint, and then work the molten material back into the hole I just made. I stab it on both sides, and then in the corners. I'm using a Hako iron, turned down pretty low. I have found that the lower temp I can use to make the joint, the more durable it is, but too low, and the molten plastic sticks to the iron too much, and it is impossible to work with.

05-28-2009, 07:35 PM	#5
fwilly Pebble Pounder Join Date: Dec 2004 Location: Farmington NM Posts: 103	It weighs 38g at this point I think the gears are 48p

05-29-2009, 04:10 AM	#6
The Real Dogman RCC Addict Join Date: Jun 2007 Location: Indian Village Pontiac Posts: 1,910	Is there anyway you can make a short video showing the welding process. I am hugely interested here..

05-29-2009, 05:49 AM	#7
2500hdon37s I wanna be Dave Join Date: Mar 2009 Location: sittin in the sky Posts: 4,630	thats prety freeking sweet and light tuber! bet when you roll over it slides too haha. thats just sawsome man

05-29-2009, 07:30 AM	#8
HomerJ Rock Crawler Join Date: Apr 2008 Location: Lexington Posts: 707	MAKE SURE YOU ARE IN A WELL VENTILATED AREA!!! Melting Delrin like that puts out some horridly bad fumes! Other than that looks good man!!

05-29-2009, 08:14 AM	#9
fwilly Pebble Pounder Join Date: Dec 2004 Location: Farmington NM Posts: 103	I will try to make a video the fumes are indeed very nasty

05-29-2009, 08:15 AM	#10
wheelhead4x4 Rock Crawler Join Date: Sep 2008 Location: Nashua,NH Posts: 472	Would you be will to make more for the right $$

05-29-2009, 09:50 AM	#13
binaryterror I wanna be Dave Join Date: Jan 2004 Location: Detroit Posts: 3,583	The fumes are formaldehyde...deadly not nasty.

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05-29-2009, 09:53 AM	#14
HC Rc Guy Quarry Creeper Join Date: Dec 2006 Location: Western Mass Posts: 300	Hey guys, I would not recommend melting delrin. Delrin does contain some formaldehyde, which can be released and cause you some problems. Delrin dust is also something to watch out for. Read all you can before you start spending too much time doing it. There are some good plastic 2part epoxies out there if you're willing to look.

05-29-2009, 11:29 AM	#16
Soup Man Newbie Join Date: Jun 2008 Location: Canada Posts: 21	Carcinuber

05-29-2009, 11:55 AM	#17
fwilly Pebble Pounder Join Date: Dec 2004 Location: Farmington NM Posts: 103	LOL I like that. Maybe throw a "t" in there carcinotuber

05-29-2009, 08:43 PM	#18
Kamikaze I wanna be Dave Join Date: Oct 2005 Location: Columbia TN Posts: 6,154	My dog eats the chips off the floor every day. Then everyday he pukes them up.

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