Efferman's Custom Parts

[allanp]

i think he want more a sportcar rim with the diameter of the 8448 tires.

btw, the high torque diff is ready. any questions?

high torque diff demonstration2 von efferman auf Flickr

is there a need for a two studs wide diff?

Love it, I have a couple questions though. Would it be possible for you to make a 12t single bevel on a 3.5M shaft as a single piece to drive it, like the tan one shown in my picture? Also, is there a way to prevent the two halves coming apart under high load? I know they cannot come apart when used inside the frame but this would cause excess friction so is there another way?

[efferman]

the 12 tooth gear should not be a problem.

coming the two halves apart, theoretical this is indeed a problem. practical i have the fear that dismantling is impossible i think i have simple to test it in real and see what happens

edit:

the first sketch of a 2m differential. this needs definetely a solid frame, because the diff is riding on the gears which are connected to the axles

and now i try a 2m diff with new gears

edit:

do you think these gears will work?

diff 2M V2 von efferman auf Flickr

edit²

if someone want test it

Edited April 17, 2014 by efferman

[Saberwing40k]

Hmm, I've been thinking, I've always wanted a differential that can fit in a linear actuator bracket, with a 20z driver. Do you think it would be possible to adapt your existing design to that specification? It would be really helpful for when I redesign my ETF truck.

[efferman]

hm, this size will be critical small, but why not try it

[efferman]

tataaa

diff 2m20z von efferman auf Flickr

no idea how much torque it can deliver, but the knob gears are very prototype. to avoid contact with the 12 tooth bevel gear they can not made bigger

Edited April 18, 2014 by efferman

[efferman]

the high torque diff is available

the 12 tooth bevel gear with axle 2,5m is available too

[Blastem]

I have been looking your models and finished 3D prints and it's incredible such prototypes yo think of.

Keep on hard working!

[efferman]

thank you very much.

to connect the beams left and right from a 5x7 frame with diff i have made a frame to save some space and add stability

unimog axle von efferman auf Flickr

edit:

btw a unimog frame part

Edited April 19, 2014 by efferman

[allanp]

All these parts are fantastic

[Dafgek81]

About the wheelloader rims for the 42030 and Liebherr L580, is it possible to make even more realistic complete rims insted of the rimcovers?

Although I like them, the real rims have a deeper profile.

[efferman]

Should the rim have the same offset like racing wheel medium or like my unimog rims?

edit is it this what you search for?

wheelloader rim von efferman auf Flickr

Edited April 21, 2014 by efferman

[Dafgek81]

Yes, that is exactly what I mean, but the offset, I have no idea what is best, they will have to fit botj wheelloaders, so I think the offset should be the same as on the rims you have used on your version of the Liebherr and 42030.

The rim looks awesome.

Great work, what is the financial damage if I would order those rims in the future?

[efferman]

i guess the rim would cost roundabout 20 euro. i will save so much material as possible to make it so cheap as possible.

a question: iam working actually at an a Air reservoir in a fuel tank design. how large it should be or make different lengths?

this on the picture is 7 studs long and roundabout 6 studs in diameter.

airtank von efferman auf Flickr

edit:

here is the rim. the offset is exactly the same like racing wheel medium. it cost 17 euro in white nylon

wheelloader rim offset von efferman auf Flickr

Edited April 22, 2014 by efferman

[efferman]

a 36 tooth clutch gear

a 13l Leafspring

a small Air Tank in similar size to the original one

Edited April 24, 2014 by efferman

[allanp]

Love it, love it! Any word yet on the 18 and 22 tooth clutch gears, and 10 and 14 tooth standard gears?

Edited April 24, 2014 by allanp

[efferman]

tomorrow, for completly new gears i have to use some mathematics. the teeths have to fit to original gears.

edit:

an 18 tooth gear

and its counterpart on a 3L beam: a 13 tooth gear

edit²

13z clutch

18z clutch

Edited April 24, 2014 by efferman

[DrJB]

Very nice. Though, I thought the spacing between axles (in units of M) corresponds always to an integer number of teeth. In the above case, the distance between the 13 and 18 teeth (assuming you meant them to mesh together) will be (13+18)/2 = 15.5 ... and that is not an integer.

a small Air Tank in similar size to the original one

The tank looks nice, though there is no need for 2 ports. One should suffice, unless you have some nice/upcoming ideas in mind.

Edited April 25, 2014 by DrJB

[fasterthanlight]

two ports is absolutely necessary for an airtank ... input and output ...

But effe - most fuel tanks aren't as round... the ends look a lot like ( )

Not so much like a pressurized vessel

Edited April 25, 2014 by fasterthanlight

[efferman]

FTL this above is only an airtank

this is a fuel tank

doc JB

iam not a mathematic genius. i take a sheet of paper, draw a distance and a gear with lego compatible teeth in a wanted number. then i draw ithe counterpart in a try and error method till the teeth fit together. but if you think a 18/13 combination doesnt work proper i will take a look again.

edit:

doc JB, you was right, 14 teeths are working better

14Z gear

14Z clutch

Edited April 25, 2014 by efferman

[DrJB]

two ports is absolutely necessary for an airtank ... input and output ...

Absolutely and most definitely not ... we're not talking about water, oil, or gasoline here .... but about compressed air. The same port can be used for both in/out. Need proof? Check Lego's own tank ... it has one single port!

Edit: as EV3Noob pointed below, the lego air-tank does in fact have two ports. Yet, my argument still 'holds', as you can do pneumatics with one port only. It is one of those 'situations' in life where it is not black and white, but multiple answers are still correct. Cheers.

doc JB

iam not a mathematic genius. i take a sheet of paper, draw a distance and a gear with lego compatible teeth in a wanted number. then i draw ithe counterpart in a try and error method till the teeth fit together. but if you think a 18/13 combination doesnt work proper i will take a look again.

edit:

doc JB, you was right, 14 teeth are working better

Thank you ... Sorry did not mean to throw in some math terminology :) ... and not a critique either. It was simply based on my observation over the many years, that all Lego gears have an even number of teeth.

Great Job and ingenuity though, keep up the good work.

Edited April 25, 2014 by DrJB

[efferman]

the lego airtank hast two out/inlets too

two new gears with a combined number ot teeths of 32

23Z

and 9Z

clutch versions will follow if possible

Edited April 25, 2014 by efferman

[EV3Noob]

Check Lego's own tank ... it has one single port!

Hmm...

[aol000xw]

This is getting serious. At some point I will need to open a new branch in my budget...

[efferman]

10z clutch

gear 10Z

gear 22Z

22Z Clutch

is there a need for 16 tooth clutch gears which are 4 studs thick to make a shorter gearbox??

Edited April 25, 2014 by efferman

[DrJB]

Hmm...

You're right ... and I stand corrected (i.e. wrong). I have not looked as such tanks for a while (and I have few of them).

Also, lately I have been working on a pneumatic project (at work, not lego), and used a tank as an accumulator. You really do not need two ports for air ... but you can use 2 if you so desire ...

If you use water however, then two ports are an absolute must, as, when you push water in, you need air to come out from the other side. This is in fact one of the main differences between hydraulic and pneumatic systems. In pneumatics, you do not need a return line to the tank, you simply vent the return out (ie, let air go out 'free'). In hydraulics however, you do need to send the fluid back to the hydraulic reservoir. Makes sense???

Edited April 25, 2014 by DrJB