3D Printed HMMWV Hood Side Bumpers

[diesel_dave]

Hello Everyone,

Just got my 2006 M1152 and am currently going through it and repairing/replacing all the little things that are worn out and broken on it. After sitting out in the sun for years, the side hood bumpers were incredibly dry rotted and basically crumbling to dust. I found replacements for like $12 each but it seemed like a simple enough design to draft up in CAD software and 3D print out of TPU plastic (gives it a little squishiness). So I did all that and I think it turned out great. This particular design requires you to bust out the old metal bushings and push them in to the new 3D printed part which was really easy for me because mine were crumbling already.

If you have a 3D printer that can print in a semi-flexible material, feel free to give this a shot and save a few bucks since these cost <$1 each to print. Even if they only last a few years, you can just print another... I have attached the STL and some photos.

-Dave

 

[Mogman]

More than $12 worth of trouble to change them, the OEM ones last for decades, doubt I will.
3D is pretty cool though and that is at least good practice.

 

[Carrera911]

I really like this idea! I got into 3D printing a few months back. I would print them in a hard material (petg) and put a 1/4” thick piece of neoprene foam or rubber on top. I haven’t messed with flexible filament yet but most of the ones I’ve seen online are really easily compressed.


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[diesel_dave]

I really like this idea! I got into 3D printing a few months back. I would print them in a hard material (petg) and put a 1/4” thick piece of neoprene foam or rubber on top. I haven’t messed with flexible filament yet but most of the ones I’ve seen online are really easily compressed.


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I think your idea of PETG and neoprene or rubber on top would work fine. There are many different durometers of TPU filament available from very soft to pretty dang hard. The one I have was just a generic brand from Amazon but at 6 perimeter layers and 25% gyroid infill, the block is surprisingly hard when you squeeze it. Even with hood resting on it, it barely deforms so I think it should be good to go for hopefully a few years. I'll keep an eye on it and see how it ages out in the elements and with the hood pressing down on it.

 

[Bulldogger]

Very cool. Thanks for sharing.
BDGR

 

[bob380sl]

Hello Everyone,

Just got my 2006 M1152 and am currently going through it and repairing/replacing all the little things that are worn out and broken on it. After sitting out in the sun for years, the side hood bumpers were incredibly dry rotted and basically crumbling to dust. I found replacements for like $12 each but it seemed like a simple enough design to draft up in CAD software and 3D print out of TPU plastic (gives it a little squishiness). So I did all that and I think it turned out great. This particular design requires you to bust out the old metal bushings and push them in to the new 3D printed part which was really easy for me because mine were crumbling already.

If you have a 3D printer that can print in a semi-flexible material, feel free to give this a shot and save a few bucks since these cost <$1 each to print. Even if they only last a few years, you can just print another... I have attached the STL and some photos.

-Dave

Hi Dave, these look great! Excellent application of 3d printing imo. Can I ask how you replaced them? I can't seem to find a way to get to the back side of the bolts holding them in.

- Bob

 

[Mogman]

Hi Dave, these look great! Excellent application of 3d printing imo. Can I ask how you replaced them? I can't seem to find a way to get to the back side of the bolts holding them in.

- Bob

They are inside the truck,,,
Put your finger on one bolt and try to touch that finger with your other finger from inside.
Unless you are drunk you should be able to find the other finger with your eyes closed.

 

[Guyfang]

I dont even know what an STL is, but assume its the directions on how to make the part. You are wasting your STL here in this thread. That's not to say don't post it here. You should. But perhaps you need to think about where, BETTER ,to ALSO post it. 3D Printing is the coming thing. I will once again use the ugly word assume, I assume more folks will be printing more parts for HMMWV's. And hope they would do the same thing you are doing. Posting the STL. Rather then having a bunch of threads with STL's, why not have them all in one place, for separate equipment?

Just a thought.

 

[bob380sl]

They are inside the truck,,,
Put your finger on one bolt and try to touch that finger with your other finger from inside.
Unless you are drunk you should be able to find the other finger with your eyes closed.

Interesting - I think I may have a different setup, since the underside of where the bumper bolts through is not accessible. That is, unless you want to take apart the rivets around that part of the chassis.

 

[Mogman]

Interesting - I think I may have a different setup, since the underside of where the bumper bolts through is not accessible. That is, unless you want to take apart the rivets around that part of the chassis.

They cannot be anywhere else, if they are "blind" then they would be set in nutserts and you can remove them without going inside.
Otherwise you are screwed..

 

[TOBASH]

Interesting - I think I may have a different setup, since the underside of where the bumper bolts through is not accessible. That is, unless you want to take apart the rivets around that part of the chassis.

If I am envisioning your truck, the central bumper attachement has a steel bar drilled at either end that fits under the hood bumper and slides into a small rectangular space. That is what the bumper bolts attach to. Seems like yours is missing.

 

[Mogman]

If I am envisioning your truck, the central bumper attachement has a steel bar drilled at either end that fits under the hood bumper and slides into a small rectangular space. That is what the bumper bolts attach to. Seems like yours is missing.

OH, I did not think about the center one, that is a no brainer.

 

[tomelroy]

I just took delivery of a m1165a1 (REV B ) and no kidding it has 3d printed hood bumpers!

 

[Superhonk]

I have a veritable “crap-ton” I believe is the correct term for 3d printers, 2 creality ender 5 pros, 2 cr-10 smarts, a Frankenstein any cubic cossul, 4 eleego Saturn resin printers, and 1 anycubic proton. I also have a 40w Chinese laser cutter/engraver, and absolutely no idea how to make my own 3d models or stl files……I would love to print some parts for my newly acquired m1123, like fender flares, a dash/console for less than what I got the truck for, light brackets and anything else people can find a use for. I’d be willing to do the printing for material costs, a considerably smaller fee than every manufacturer in the world, and you provide the files or have them commissioned. Also am a whore for take off parts I need!


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[TOBASH]

Mods…. What about a dedicated CAD/CAM three D printing forum?

 

[Guyfang]

I would address that the Patracy, in a PM.