3D Printed Stainless Steel Outdrives

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Re: 3D Printed Stainless Steel Outdrives

Post by lmw94002 » Thu Aug 10, 2017 12:46 pm

I'm excited to see the results of this too! Crazy what technology is out there now.
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Re: 3D Printed Stainless Steel Outdrives

Post by JK Racing » Sat Aug 12, 2017 4:35 pm

jwscab wrote:
Wed Aug 09, 2017 6:11 pm
i only worry about mushrooming of the cups, If I remember correctly, aren't these also made with a brass or bronze matrix? ie, the stainless powder is intermixed with a brass alloy? would be good for wear, just hope they have enough stiffness.

Might be worthwhile to design some cup rings grooves, like you would see on plastic outdrives. very interested to see the results.
Or something like the Outdrive Savers we used on the XX4 with plastic outdrives :)
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Re: 3D Printed Stainless Steel Outdrives

Post by mk-Zero » Sat Aug 12, 2017 4:40 pm

Got a pic of how those are assembled with the plastic outdrives Joey?

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Re: 3D Printed Stainless Steel Outdrives

Post by JK Racing » Sat Aug 12, 2017 5:18 pm

slide right over the top...let me see if I can find a pic
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Re: 3D Printed Stainless Steel Outdrives

Post by JK Racing » Sat Aug 12, 2017 5:21 pm

Not a great one...
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Re: 3D Printed Stainless Steel Outdrives

Post by mk-Zero » Sat Aug 12, 2017 5:26 pm

Oh that makes sense. Even with those, I don't think printed nylon ones would survive the brushless/lipo torque and clay and turf traction of today. I think the pin on the end of the CVA would destroy the plastic contact surface of the outdrive.

Let's keep our fingers crossed the printed metal ones hold up. If they do spread i can see about collars for them.

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Re: 3D Printed Stainless Steel Outdrives

Post by JK Racing » Sat Aug 12, 2017 5:29 pm

Agreed, LRH has good bite, it will put some pressure on them :)
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Re: 3D Printed Stainless Steel Outdrives

Post by mk-Zero » Sat Aug 12, 2017 5:34 pm

I will run them on my 10M with the 8.5 and see how they do. Assuming they are accurate enough to even assemble. We'll see.

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Re: 3D Printed Stainless Steel Outdrives

Post by mk-Zero » Sun Aug 13, 2017 9:54 pm

These have been showing as "In Production" since around Wednesday, hoping they'll ship this week.

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Re: 3D Printed Stainless Steel Outdrives

Post by scr8p » Mon Aug 14, 2017 12:36 am

Knock the pins out of the dogbones and use weed whacker line. That what we did when we ran aluminum outdrives on the oval cars.

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Re: 3D Printed Stainless Steel Outdrives

Post by Northeee » Mon Aug 14, 2017 8:46 am

Watching this with interest 👍🏻

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Re: 3D Printed Stainless Steel Outdrives

Post by lmw94002 » Mon Aug 14, 2017 1:07 pm

scr8p wrote:
Mon Aug 14, 2017 12:36 am
Knock the pins out of the dogbones and use weed whacker line. That what we did when we ran aluminum outdrives on the oval cars.
That's awesome. How often did you change that solution out?
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Re: 3D Printed Stainless Steel Outdrives

Post by scr8p » Mon Aug 14, 2017 1:24 pm

It would really depend on if you were running stock or mod, but they lasted awhile.

IRS used to sell kits that did the same thing.

http://www.ebay.ca/itm/VINTAGE-RC-RACIN ... 0005.m1851

The MIP Pucks system is a more elaborate take on it but the goal is the same. Save the aluminum outdrives (and the bones in this case) from premature wear.

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Re: 3D Printed Stainless Steel Outdrives

Post by mk-Zero » Wed Aug 23, 2017 3:23 am

The printed outdrives came today.
My first impression: nice!
20170822_174829-1008x756.jpg


The outer bearings went on nicely, but on one side it didn't quite bottom out:
20170822_181918-1008x756.jpg
20170822_182304-1008x756.jpg
I can put a small undercut in the model to prevent that from happening. I think some factory parts are even like that.

This is slightly more problematic. The diff bearing did not fit in its hole, the hole is a little undersized
20170822_182228-1008x756.jpg
Likewise, the bearing would not go on this post
20170822_182329-1008x756.jpg
I plan to measure how much those two features are off by, then compensate on the CAD model. In other words, if the bearing bore is undersized by .005, I'll make the hole .005 oversize on the CAD model. These two features are only off by a few thousandths each, so I think it's a reasonable approach.

I'm the mean time, I'm going to machine these outdrives to get them to fit so I can test their durability, which is the other big question aside from fit. Once I get them to fit I plan to run them in my RC10M and see how they hold up.

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Re: 3D Printed Stainless Steel Outdrives

Post by JK Racing » Wed Aug 23, 2017 4:38 am

They look pretty good, cant wait to hear the results :)
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