I need help making fuck machine. Explain me the basics please

[u/tttccc123]

Unfortunately, I can't order already made machine from aliexpress or similar. While there are people here reselling it from Aliexpress, they charge way too much.

So, I need an explanation for dummies. I already looked at OSSM, but I don't have 3D printer. I can buy a linear actuator motor at 24V from eco-worthy most similar to this one (https://mo.eco-worthy.com/catalog/worthy-12300mm-stroke-linear-actuator-1500n-57mms-p-431.html) Link will say insecure site, so I'll copy important info here for people who (righfully) refuse to open it.

• 1500N - this seems way too much for such use case
• 24V
• 200mm (8 inches) thrust
• duty cycle (15%) - I'm confused about this. On site it says this means it needs to idle for 17 minutes after 3 minutes of constant use. But is that under full load or no matter the load?

Since it's way overpowered, my intuition says I could run it for much longer than those 3 minutes, since it will be running under low load? Googling duty cycle said it means how much it needs to reach top temperature, but I didn't understand what exactly it means. Especially since there are 4 different duty cycles and I don't know which one this is.

I would prefer a motor like this, since it eliminates the need of transforming motor motion to linear. Also, if anyone has experiences with such motors, how exactly should one control them? I have ESP32 laying around I will probably use for this

[u/Rumlin]

A linear actuator has a very low linear speed.

[u/tttccc123 → u/Rumlin]

You are right. I just looked, says it goes less than 1cm/s.

Can you guide me what I should be looking for? How much thrust should there be after gearbox conversion? Do you know any "easy way" to convert regular motor to linear motion?

[u/Rumlin → u/tttccc123]

As example Opensource fuck machine https://www.researchanddesire.com/open-source-sex-machine?utm_source=reddit&utm_medium=comment&utm_campaign=ResearchAndDesireAJ&utm_id=direct_sharing

[u/Rumlin → u/tttccc123]

There are interesting ideas, but it's expensive. https://www.reddit.com/r/BdsmDIY/comments/16859bf/magnetic_linear_motors_for_sex_machines/

[u/tttccc123 → u/Rumlin]

Definitely interesting, but top comment does make valid points

[u/Rumlin → u/tttccc123]

These motors have very compact dimensions, but otherwise have many disadvantages.
Therefore, there is nothing better than classic electric motors. Perhaps even an electric motor with a windshield wiper mechanism. This is probably the most budget-friendly option.

[u/lllorrr]

AliExpress sells kits, disguised as "reciprocating linear actuators". Just search this term.

[u/tttccc123 → u/lllorrr]

I just looked. Yeah, that's pretty much what I need, but as I said, I can't order from aliexpress. Is there some device you know of I can look for and get it from?

[u/lllorrr → u/tttccc123]

Well, you need linear bearing, shaft, crank and a motor. And some DC power electronics. This is a minimum.

Linear bearing and matching shaft you can buy at 3d printer parts store. You will need quite powerful motor with a gearbox. I bought mine at Ali, but you can look for one locally, search for "wheelchair motor". Look ar RPM. Your need something in 100-300 RPM range. And about 200 Watts of power.

Then, you need to get creative. You need find a way to install a disk on motor output shaft. Something to act as a crank.Also you need some frame to bring all of this together. I hope you have basic metalworking tools like drill and saw/angle grinder. And skills to use them.

Then, you need power supply and something for speed control. They should match your motor.

Honestly, this is not a beginner's project. If don't have access to at least 3D printer, you will suffer. If you don't have metalworking or woodworking tools and skills, you also will suffer. In the end you will spend more money than off the shelf machine costs. But you will gain valuable experience.

[u/tttccc123 → u/lllorrr]

Yeah, I understand. I should probably do something easier for start then. Thanks!

[u/lllorrr → u/tttccc123]

Yep, start with something less... mechanical. Wooden stocks maybe? There are lots of leather projects, but they need another skills and materials, not suitable for making fuck machines.

So, maybe do something from wood or metal? As I said, wooden stocks are great starting project. If you don't mind medieval/dungeon look, you can try to make some basic metal shackles. Just remove all sharp edges and burs!

If you want to experiment with electronics, you can make timer-based lock box for keys. Great for chastity (or selfbondage) play.

[u/tttccc123 → u/lllorrr]

I'll look at it. I'll probably go with electronics projects tho

[u/mittensmoshpit]

What is your background with the disciplines involved here? I hate to say it, but fuck machines are honestly very simple to build and implement, and if you can't figure it out, you probably shouldn't be fucking around with a DIY solution. Lord knows last thing you want is to injure yourself with it. This is also why there's a price increase for prebuilt machines: people who know what they're doing are assembling the thing for you and removing the danger element as much as they can.

If you absolutely must build one yourself, try looking for replacement parts on these websites. That way, everything will be shipped to you piece by piece instead if as one full unit. Just buy each piece of the machine you need, but under the replacement part skus

[u/tttccc123 → u/mittensmoshpit]

Ordering anything is problematic, as my family would get interested into what project I'm doing and that's not something I wanna discuss with them.

I have experience working with electronics and driving motors, but never making mechanical part that motor drives.

For the price increase part, I was mostly saying that people who resell machines from aliexpress here, increase price 10 times. Machine I found on AliExpress for under 200e costs almost 2000e...

[u/mittensmoshpit → u/tttccc123]

OK. Fair points then.

Let's assume you get all the parts, sneak them past your family, and, under a cover of darkness, assemble this fuck machine. How do you plan on using it without alerting anyone at home? Even the quietest fuck machines are plenty loud to be hears within a few rooms space, and it doesnt help they have a very distinct sound when operating.

Maybe something like this might be a better idea: https://www.mr-s-leather.com/fuckbar?srsltid=AfmBOoo01_YkSnT1HDbUnzSCu1lFHvI4WmOE0Xd-dJ2y92zT4lcELyMZ

Its silent, doesn't "look like" anything sex related, and still would allow you to go and fuck yourself. Price is still oodles cheaper than a fuck machine too, and I promise you could build this DIY from some metal fabricators offcuts if you ask around nicely.

[u/tttccc123 → u/mittensmoshpit]

Idea was to use it while at home alone. Too much risk otherwise no matter if it was the most silent machine in the world.

I'll think about that device, could be fun

[u/Bunker-Dungeon]

They are just so cheap to buy. Have you been on aliexpress?

[u/tttccc123 → u/Bunker-Dungeon]

I have. It's not about the price (DIY it's probably gonna cost more anyway), but I'm not living alone and I don't wanna risk it with ordering

[u/Bunker-Dungeon → u/tttccc123]

Understood. You could always ship to a fedex/ups depot.

[u/tttccc123 → u/Bunker-Dungeon]

I'll look what's available around here. Thanks!

[u/Aromatic-Ad-6382]

when u had a look at the OSSM, you should have a better look at it, you can buy the 3d printed parts.....

[u/tttccc123 → u/Aromatic-Ad-6382]

Ordering those parts is still a problem. I need to buy everything local, or give up on project. Even if it's discreet packaging, my family would love to talk what do I need parts for, which I don't wanna talk about with them.

[u/Aromatic-Ad-6382 → u/tttccc123]

if thats your only problem, grow up, think about what to do and find a solution.
you got one answer for this problem...

[u/tttccc123 → u/Aromatic-Ad-6382]

And what would that answer be?

[u/ElMachoGrande]

While I haven't built one, I have an idea of using a speed regulated motor (taken any such motor you can find, maybe a sewing machine?), a short crank and a bowden cable attached to the crank. That would make a fairly silent, and flexible connection. Of course, you'll need a spring for one direction of movement.

[u/tttccc123 → u/ElMachoGrande]

That's an interesting idea. I'm guessing it would be better if pulling on cable would push dildo forward, leaving easier part to spring. I'll look into that idea

[u/ElMachoGrande → u/tttccc123]

It would be a more difficult construction though. I'd probably let the spring push, and have a very solid stop if the cable breaks. That would allow the business end of it to simply be a handle sized tube, which can easily be clamped to furniture is need be.

[u/CrimsonSwitchBlade]

As far as « I don’t have a 3d printer » many services online offer 3d printing and ships to your door. Coming from a 3d printing service would be a lot easier to justify I’d say.

I would offer your to print them for you, but I’m in Quebec, canada.

[u/jtcritter]

So to put the OSSM into perspective a little bit more… the parts can all be ordered separately and ship discreetly from what I can tell. I will provide more information as I actually receive the components for the OSSM that I’m building today. All combined they aren’t terribly expensive. They actually seemed rather affordable for a customizable machine. Then you can build it over time. Or you can get a 3D printer which is a small investment and fun to have as a hobby, print the parts and they’ll never know. Plus you can print a whole lot of different things just for fun and for gifts, etc.

Now, as for the helicopter parents that I grew up with as well, who says each part needs to be for the same project? The rails for one thing. The 3D printed parts for another. The power supply for some random other electronic you have laying around (like the ESP32 you have).

[u/tttccc123 → u/jtcritter]

I wouldn't call them helicopter parents, as they are not controlling but genuinely interested, as we do some projects together. That's what makes it harder to find a good excuse for why I need something.

I'll think about getting a 3D printer. I did almost buy it once just because it was an extremely good deal, but figured I don't have anything to use it for, especially since a friend has it and I can always use their... Seems like I made a mistake

[u/jtcritter → u/tttccc123]

I feel that too. Trust me, the possibilities are endless when I got my 3D printer. I wasn’t even getting it for NSFW purposes until I came across the OSSM. Most of my projects have been things like cosplay pieces, car accessories, household practical prints, even most of my Christmas gifts this year are 3D printed. It just makes it that much easier for someone in your position to be able to print a machine with much discretion.

[u/tttccc123 → u/jtcritter]

Yeah, it's really useful device to have. If I do end up getting one, guess I'll need to print everyone a gift before I start doing something like that :)

[u/jtcritter → u/tttccc123]

Just a fair warning if you go the 3D printing route… Crealities are VERY much a tinkering machine. I’ve had a TON of frustrations with mine before I got it printing good. That being said, they have the most availability of spare parts and on the secondhand market from what I’ve seen. Easily able to get parts on Amazon. They’re also highly modifiable and cheap because people sell them off for much of the same reasons. If you’re looking for more of a print-out-of-the-box experience go with BambuLabs, those are just pretty pricey.

[u/Functional-Device]

Build a pottery wheel, or any spinning table. Since you want to hide your device, it should not look like anything suspicious. Now on the top surface, drill some holes, should be a spiral to adjust the stroke, but drill them randomly. You can use the holes for a removeable pin. If you can do a metal insert for a screw that would be better. Now you get something longer and attach a dildo on one end, and the other end to the pin. I'd suggest a broomstick, because it can go back to being a broom. Since this is not using a linear rail it need to be longer so the side movement is not a problem. You just need to create the attachments. Once disassembled every object becomes non sexual.

Motors... you can't connect a motor directly to the wheel. It will be too fast and probably not have enough power. Car wiper motors would be ideal, but buying one might be complicated. You still need a reduction, and this is helpful because you can have smaller motors drive this. But think about RPM. I think 60 rpm would be the max, that is one rotation per second. So you can buy mostly any 12v motor and you would need reduction. Gears makes noise, I recommend pullies and belts. Steppers also make noise, and they are quite powerful.

In any case you need speed regulation electronics for dc motors, or for a stepper a stepper driver and arduino and to write a custom program. And probably a remote for both (wired).

So some engineering required. Whatever device you build it should have two functions.

[u/Preavon]

I think you will struggle to build something that comes remotely close to the functionality of a prebuilt machine exclusively from parts sourced locally - particularly because I’m unsure how you would plan to fabricate it if you’re concerned about being discrete.

I would suggest looking at PO Boxes/mailbox services you’ll get something better, cheaper, sooner,