Home made DIY Flywheel Box for eccentric inertial flywheel training

[@thetruemorg]

This is a fantastic build. I like how straightforward it is. I remember the first time that I tried a flywheel machine not knowing what I was getting myself into and I walked funny for a week. I look forward to building my own and inflicting beautiful torture on friends that I have over.

[@maxKovy]

Hello Adrian. Congratulations for your great machine. Do you think it's possible to make a video using your machine. thanks

[@Palpac]

I'm glad i found this vid, it works how I though they did, have seen these for sale for $3k in my country which is a joke. Nice work!

[@michiel5160]

Saw a Jujimufu video where he visited David Herrera's homegym. He first built his own prototype, but said that for the quality of bearing he needed it was actually worth the $3k.

[@Findyournextguitar]

I'd love the specific dimension / parts if you have them written out somewhere

[@JasonJohnson-ke2pr]

Nice build, but how does it function? Can you do a video of it in motion to show how it works?

[@smartcookie11]

So what is the function of disks, and will a bar with a greater diameter cause more resistance

[@ryanh2071]

Bravo. Am I seeing this correctly that the rope is just attached to the axel with tape?

[@robertnegrete5510]

Can you put a diagram of equipment and measurements? That would be great

[@mrodin]

Thank you for sharing. I'm going to build one of thise. Thanks again!! one of the best DYI ever

[@kresimiros]

could you please explain how to tie rope around shaft, thanks in advance..

[@robertgail8374]

Thank you where did you get your disc's?

[@alblunt9306]

What Recommendations for strapping or rope, I ripped everything, polyester darcon polypropylene nothing last past a workout

[@per7159]

Thanks so much for the video. What have you used to cover the threads of the bolt or is the bolt unthreaded except for the ends?

[@FknNefFy]

How is the rope secured to the bar?

[@blueknyght923]

May I ask, can I just use this 13" scooter wheel steel rim lying around in our garage for the flywheel? I think it weighs about 5 kg. Could it store enough energy for some high-intensity squat exercise? I'm hoping it could save me the cost of having a flywheel made for the purpose.

[@ivelinslavov]

How you make mechanism of push pull?

[@arsimmehmeti4564]

Nice job man, can we see it in action how it works? Thanks

[@athletic_improvement]

Here’s a video showing some exercises - kzbin.info/www/bejne/n561oWqjd7SonNE

[@adi4191]

Hey Adrian, what would you estimate was the total cost in Australian $ to build this, including all parts and labor? Do you have a diagram or drawings with the measurements of the box? Would love to try my hand at this. Thanks for the help and tutorial!

[@kelleynadine211]

Yes please let us know the total costs✋

[@andrewfits2533]

This is awesome mate. I'm keen to know more

[@athletic_improvement]

Let me know what you want to know.

[@andrewfits2533]

@@athletic_improvement I just read your other replies, which were great and answered most of my questions. Where did you source all the materials from in OZ? Bunnings or else where?

[@athletic_improvement]

Andrew Fits yeah, Bunnings. They have lots of short lengths of dressed pine in lots of sectional sizes which was very convenient. Got the axle rod and nuts from 316shop.com.au Bearings from eBay and steel discs also on eBay.

[@andrewfits2533]

@@athletic_improvement you're a legend

[@matthewmacgregor6728]

Hey there Where did you get the flywheels from?

[@NadineN8K]

How did u fastened the rope to the axis

[@hjwong87]

This is amazing, Adrian! Thank you! Saved us all from the crooks who charged 2-3k for this simple contraption. Any chance you can provide exact list of dimensions and what to buy?

[@athletic_improvement]

I gave the dimensions that I used in the video as a guide, but everybody will have material supply sources with slightly different dimensions. e.g. the plywood top I used was already exactly 600mm x 1200mm, so I didn't need to cut it. Other materials I bought were also for convenience of minimal cutting. The exact dimensions of the box are not so important, but the axle rod, pillow block bearings and holes in the flywheel discs are important to be a precise movement. The bolt for the axle I used was 20mm diameter x 550mm long, so the pillow block bearing also have to be 20mm.

[@amusik7]

They are not crooks. They have spent years developing and perfecting a design in a niche industry that is not very profitable atball - so the price is not nice but it's justified.

[@jasonkuzmak2112]

You don't show it working or what it does. Found this by searching "DIY flywheel"

[@JbskMsj]

So how does it work? And can I build using bigger bearings so normal 2inch plates will fit on it?

[@dangriffiths3825]

Thoughts on using rope verse webbing? KBOX uses webbing & you used straps... Pros and cons? Any trouble using rope?

[@Piggyfryup]

Well done Adrian, I am looking to make my own after watching this, but I don't understand the Axel going from the bearing to the discs? I can find axels that are solid but not threaded, then searched for single end threaded axel and can't seem to find what you have used to connect the discs to the rod and still have a flat surface for it to roll on bearings? Any help/guidance would be greatly appreciated!

[@akshayrockstar431997]

Hello brother.....how does the rope retracts when I pull it up

[@kylesullivan47]

It looks like the rope rolls up based on the inertia of the wheel, then you have to reverse this direction at the turning point. I imagine you change the rope length based on the ROM of the specific exercise. Very cool application, I want to make one now. Adrian- thank you for sharing!

[@Palpac]

Works like a yo-yo

[@ricardomrobles]

In comparison the flybox is this worth it

[@michaelbrowne9293]

Hi, have you thought about building and selling these im quite interested and based in Australia

[@patrickkobylski6645]

Do you have a site with material liste?

[@stefanolivierazugiani7358]

hello is it possible to know how this inertial machine was built?

[@TKevinBlanc]

How much flywheel weight should one be aiming for? Should a weaker beginner start lighter? I know the eccentric "resistance" is proportional to how hard you can pull, so maybe not.

[@cesarcastellanos2341]

Could you give us a kind of plane please

[@TheFatlittleazain]

Adrian how much did this cost you? Were you able to purchase everything at a hardware store?

[@yuryalonso8826]

Awesome bro!! Thanks to you I had an idea of how to make my own.

[@jonscribner3078]

Hey, just curious what was your overall cost of this build? Looks awesome! Also, is the rope still preferred or did you find a more durable or better cable replacement for newer builds? Thinking of building one myself also. Thanks Adrian!

[@rexr2025]

how heavy is the steel plate ?

[@mattmancz3286]

Awesome mate! Love the Xero shoes too. Working on similar build.. any tips to straighten bolt? Mine arrived slightly skewed as well. Cheers.

[@sethsevilla1251]

Is there a reason why you need more then one plate? Could you also explain how the size of the wheel affects the machine? I’m in the middle of building a box model for vertical pulling and one that attaches to my squat rack for horizontal pulling. I’m almost finished, however, I only have one 10 inch wheel for both.

[@athletic_improvement]

The size or quantity of plates affects the inertia and power required to reverse the movement.

[@marcoantonioc5437]

Adrian See I’m building one and I got 12inch diameter by 3/4 inch thick circle plate I think I might be too strong at help?

[@moccomocco]

I'd love to buy one from you if you're selling

[@bigr9219]

Hey bud, Did you buy the disc like that or get them machined? Also with the rod, was it a blank and you get the threads cut on it?

[@tulkaselfuerte8789]

I don't understand how the rotation ocurs. :( T-T

[@CheeseBallWillie]

Top of box: 2’ x 4’, 3/4” thick Side of box: 7.5” x 4’, 1-1/4” thick Legs: 3/4” x 3/4” x 10” Inside support: 3” x 1-1/2” Pulley: single swivel, 50 mm Cam cleat for boating Rope: 5/16” diameter Rod/axel: 3/4” diameter, 22” length Nuts: 3/4” Plates: 12”, 8”, 6” - 1/4” thick Pillow block bearing: 3/4” (or whatever size rod is)

[@valveman12]

Adrian See Nice build. I have started making my own flywheel exercise platform. Instead of wood, I welded a steel frame using 12Ga 1.5" square tubing. I wanted to ask what type of bearings are you using. Are these just standard pillow block bearings? It would be great if you made a video of you using your flywheel exercise platform. Thank you😁

[@kidbullet]

I have 3 questions: 1- Where did you get those plates? Did you just buy them online? I was thinking that disk brakes would also do the job.. 2- When the rope starts rolling around the shaft, I imagine it can get overlapped by other parts of the rope. Does that impact in any shape or form the moment? Do you feel a brief relief and then another hard pull when performing movements? I am asking that because some devices use a cone, and I think it is to get a) linear force and b) the rope wraps around nicely. Curious to know your thoughts. 3- If you need bigger cable, do you just add some carabiner to the rope? Excellent job there by the way, congratulations

[@bigr9219]

Did you build it using disc brakes?

[@swastikgrover3414]

you said other devices use a cone, can send a link to that device? I'm trying to make one, so if a cone will help, that will be helpful

[@Steven-tw6wn]

What was the total cost of this build?

[@Palpac]

@@alejandromitrano5575 stop advertising

[@sergiopainefilu8809]

you are a "crack" as it is said here in Argentina, thank you very much for making the video, I had a small idea of ​​how to do it and it turns out that I was right, unfortunately everything here costs twice as much as in any other country, thank you very much

[@frankarias4985]

Good job mate

[@williampowell4498]

How did you get pipe with threads so long?

[@athletic_improvement]

It’s just a long bolt. I bought it online. If you google M20 550mm bolt you will find it, or you can get 500mm, 600mm, doesn’t make much difference depending on what box size you make.

[@kimja1313]

So well done,thx

[@t00c00l4ya]

Hey mate, fellow Aussie here looking to build this box as a lockdown project since Bunnings is still open. Looks great except I'm slightly concerned that the rope will unevenly wrap around the axle and throw the force distribution off (pulling a participant forward or back) so ill look to make a smaller hole. Where did you buy the hex bolt and the flywheels though? Can't find the bolt anywhere and I'm guessing you're using steel circular plates that have been drilled to match the bolt

[@athletic_improvement]

Hi, I got the bolt online from 316shop.com.au It’s in one of my other replies to another question. The discs were from eBay, just search steel disc, a place in Melbourne. I got the 200 and 300mm drilled accurately by an engineer, $30, because I drilled the 150mm disc myself and it wasn’t the best result.

[@t00c00l4ya]

@@athletic_improvement That's perfect, thanks mate.

[@ParabensPadfoot]

Hello! This is really nice. I’ll try to make one for myself. I have several questions: 1. What is the “spinner” you mentioned here? Not sure if I’m picking up the word correctly. It's at 6:35. kzbin.info/www/bejne/pZ6Yh4aAmbZjfcU&t=395 2. How does the mechanism work? You pull on a handlebar that’s attached to the pulley, the metal plates rotate. Then how does it counterrotate in the downward motion? What’s causing the metal plates to counter rotate? Any spring loaded mechanism somewhere? Thanks!

[@ParabensPadfoot]

I thought more about the second question. It seems that there is no spring loaded mechanism. It seems that the mechanism is similar to a yo-yo. When you throw a yoyo down, it comes back up. In terms of yoyo, your hand is fixed and yoyo moves down and up. In terms of Flywheel, the wheel is fixed but you move up and down. If you could clarify 6:35 still, that would be awesome! Just want to make sure I'm not missing any parts. Thanks!

[@Strengthinevidence]

Can you post just a video of you using it?

[@athletic_improvement]

Yes, here is one with some exercises - kzbin.info/www/bejne/n561oWqjd7SonNE

[@athletic_improvement]

kzbin.info/www/bejne/n561oWqjd7SonNE

[@Strengthinevidence]

Adrian See so is the rope just taped to the axle? And just wrapped around it? This looks stupid simple to make compared to whet it seems like it would take based on the price or commercial units

[@athletic_improvement]

J Templar there is a hole drilled through the axle and the rope goes through it. I tied very simple hitch knot and taped the end of the rope so it sits flat against the axle. There is never any real strain on the knot because when you are pulling hardest is when the rope is fully wound on the axle.

[@edn8539]

Legend

[@matthewbrailey1068]

This is a really nice design. Thanks for sharing. I am curious if you can offer some guidance on the math behind your decisions on the plate sizes? I presume that there is a way to try and sort out the force that results from a plate of a certain dimension. Also, along the same lines, did you consider putting a gearbox in line that could increase the ratio and produce more RPMs on the discs? These are fairly inexpensive and might be a way of using smaller discs with a similar effective load. Bottom line, this is really great work and I appreciate you sharing the details.

[@athletic_improvement]

I just did it by trial and error, at the moment there is a 150mm, 200mm and 300mm disc, all 6mm thick. The 150mm is a bit small so I'll get rid of that and I have ordered an extra 2 x 300mm discs, but even the 200mm + 300mm is plenty for most exercises. 3 x 300mm discs will be super hard for some heavy squat movements, but I'll build into it over a long time. I'll put a thicker sleeve over the 20mm axle which will lower the force required so I can use slightly more disc weight and it should be even smoother.

[@ottererg587]

awesome machine man. Question, can you convert this into an engine for a do it yourself SkiErg?

[@raunefare]

It's not the same mechanism. A skierg only spins the flywheel in one direction. And the wire is pulled in with a spring. It's more like the cable pull on a lawn mower

[@ottererg587]

@@raunefare would this be better for that in your opinion then

[@raunefare]

@@ottererg587 it will not feel like a skierg if that's what you want it to.

[@ottererg587]

@@raunefare do you have any rec to make a machine on your own.

[@raunefare]

@@ottererg587 Bye and old cheap rower and some pulley's and make something like this kzbin.info/www/bejne/Z4jGmKVsqMSGb9k

[@clgujar7266]

Show exercise demo

[@AngusLogan]

Set cool

[@AngusLogan]

Very cool 😎

[@alicooks5650]

This is a great video but missing a very important step that is using your flywheels

[@jledesma1175]

Can you list the specs?

[@zaffarspater]

Yes please can you list the specs

[@plinkert22]

Good build. Basically a jojo on roids. Well done

[@approxsolutions6946]

😂 and save 5k $$ immediately!!!! thanks 🙏 for sharing

[@LarryRichelli]

A lot of work when one could just buy a handy gym which is much more portable and fun to use.

[@craigr13666]

So, basically the same principle as a yo-yo...

[@marijnjanssen4736]

A 550mm bolt 🤣🤣🤣 Never seen one before