3D Printing Parts - Page 5 - RC Groups
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Nov 29, 2010, 06:19 PM
Mmm, tugs...
patmat2350's Avatar

Got my 3D printed STAINLESS STEEL struts today. Printed by a computer. Wow.

Actually, stainless steel powder, sintered and infused with a copper binder. And of course the parts have the visible layering... but I'd much rather clean up these rough parts, than try to carve them from blocks of steel!

Not cheap compared to Dumas struts (which wouldn't fit anyway), but a real deal for custom fabricated stainless parts. I'm happy.

In addition to grinding and polishing, I'll ream out the hole for Oilite bearings, and tap the boss for a retaining screw.

p.s: 14 calendar days from placing the order, to box on my doorstep. Free shipping from the Netherlands, and about one Andy Jackson each.

p.p.s: Thinking about printing up forty 20mm Oerlikons for your 1:96 Missouri? Fuhgettaboutit. Minimum printable part thickness is 1mm, and just look at that surface finish! It has its uses, but not for small details.

Last edited by patmat2350; Nov 29, 2010 at 07:32 PM.
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Nov 29, 2010, 07:47 PM
Big Boats take Big Bucks!
1Ironhorse's Avatar
Wow, looks great! Thanks for forging the way. I've been designing my struts & other parts in anticipation of using the SS pinting process. They will be pricy, but consider the cost of machining, not such a bad deal.
Nov 29, 2010, 08:28 PM
Mmm, tugs...
patmat2350's Avatar
My pleasure.
Here's one rough polished and "machined", fitted with an Oilite bearing for 1/8" stainless shafting.
Nov 30, 2010, 12:01 AM
Grumpa Tom
Kmot's Avatar
Amazing technology. I had heard of plastic 3D printing but now in metal? Oh, the extreme possibilities!
Nov 30, 2010, 12:21 AM
Taking care of the pond.
Nov 30, 2010, 08:42 AM
Registered User
The finish on the metal parts almost looks like the old sand castings you could buy. Looks like the metal is pretty soft so you can 'mill' it. I know that some places will print objects in a media that can further be used to cast parts in metal.
Nov 30, 2010, 11:36 PM
Big Boats take Big Bucks!
1Ironhorse's Avatar
How does the strength of the part seem. What is the thread size of your screw? Do you think a SS printed part would take #4-40 threads without stripping out?
Dec 01, 2010, 05:44 AM
Mmm, tugs...
patmat2350's Avatar
It's VERY strong. Think of a bronze casting sprinkled with stainless steel dust. I actually had a hard time putting in the 6-32 tap, ended up grinding off that feature and through-drilling for smaller screws.
Feb 24, 2011, 01:48 AM
Registered User
a9wr816t74's Avatar

Carbon Fiber Part Printer


Got my 3D printed STAINLESS STEEL struts today. Printed by a computer. Wow."

Thanks for posting this patmat2350
Those parts look great, I recently looked into metal sintering of aluminum but couldnt find a good deal. the picture is an adaptation of Volker Jung's coaxial i drew on CAD and now want to get printed, hoping to get a lower price than Volker Jung offers(10,000$ for the mechanics i believe).

I am starting a project on using carbon fiber .15mm fabric layers with an SLA that prints in .15mm layers, hoping to end up with a Carbon Fiber Reinforced Plastic printer of sorts, so as to print out Carbon Fiber rc heli parts. My goal is a tensile strength value at least that of aluminum (400MPa), whereas most 3D printed parts only have a tensile strength of less than 100 Mpa. CRFP can be as high as 3000Mpa.
I have found websites with cheap FDM machines that could be modified, but havent found cheap SLA machines yet though.
Last edited by a9wr816t74; May 17, 2011 at 01:26 AM.
May 06, 2011, 05:39 PM
Mmm, tugs...
patmat2350's Avatar

Another Project

Working on some axles for a secret long-term project... oh, there IS a propeller involved!

Need three large beam axles with differentials, so I'm building cases around some Traxxas truck difs. There will be a lot more to these.

Designed in CATIA... saved as an STL file... sent to Shapeways, who printed the the trial parts in sintered nylon and got them back to me in 2 weeks.

I didn't realize that the coarse mesh visible in the STL was real geometry... next time, I'll define a finer mesh for smoother surfaces.

But I'm pretty happy.

May 06, 2011, 05:52 PM
Sea Dragon-Lover
Umi_Ryuzuki's Avatar
Amazing work Pat.
I wish I better understood the tools you doing your layouts with.
There is so much to "imagine".

May 07, 2011, 08:18 AM
Registered User
Pat, let me guess a DUKW? (from the rear drive train pic above)
As for the faceting, I kind of like it, gives it a different kind of 'intentionally jeweled' look. Nice job on it though
May 07, 2011, 08:21 AM
Mmm, tugs...
patmat2350's Avatar
Thanks Aimee.

Foo: If it quakws like a dukw...

I found where to set my STL model resolution. There are limits, the file size gets out of hand quickly... in this simple example, my original STL (right) is < 1 MB... the highest res I can save (left) is 5 MB.

I might go with the middle one... 2 MB.
May 07, 2011, 10:09 AM
Registered User
ForkTailedDevil's Avatar
Pat, Correct The quality of the printed part depends on a number of things. Definition of STL file is but one. Material and the settings ont the printer.

I'm in the process of designing a 1/12th scale PIBBER. Its next to impossible to fine 1/12 scale accessories so i have modelled everything in cad 3D and will get much of it printed.
May 07, 2011, 10:41 AM
Mmm, tugs...
patmat2350's Avatar
Just don't set your expectations too high... even the best printing processes available won't match the finish found on a typical molded kit part.

Mixed media can help... maybe print the body of your Ma-Deuce, but make the barrel from tubing...etc.

Shapeways is offering a pretty high-res process now, which is a step in the right direction:

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