JJ2's Custom part designs

[JJ2]

I recently learned how to 3d model so I started making parts compatible with Lego (thanks efferman )

So far this is the only part I have made, it used on the portal axle piece to cover the gear to stop dirt from getting on the gears causing wear.

[JJ2]

I made a 12t gear that you can print in metal for high stress situations.

https://www.shapeways.com/product/46W7RYBSK/lego-12t-gear

Edited October 28, 2016 by JJ2
added a picture

[Tommy Styrvoky]

I think you could use either Lpub's export tool, or LDR importer for blender, and export the original ldraw meshes into your CAD program of choice, to modify original parts. That's just a thought, if you want to keep part of lego's design for gears ect.

Edited September 8, 2016 by Tommy Styrvoky

[JJ2]

I think you could use either Lpub's export tool, or LDR importer for blender, and export the original ldraw meshes into your CAD program of choice, to modify original parts. That's just a thought, if you want to keep part of lego's design for gears ect.

I could but I liked the challenge of recreating the gear, it was quite painstaking, but rewarding.

[Tommy Styrvoky]

I could but I liked the challenge of recreating the gear, it was quite painstaking, but rewarding.

Yeah it's a fun challenge of making cad models of lego parts. I wonder if there is a good directory of tolerances for 3D printing lego parts. Say pin holes, or axle holes, ect. as there is some expansion with 3D printed plastics, and it probably varies from printer to printer. It's one of the things that I wonder about for printing 3d parts, as it could be too loose/tight for a good fit, even though the measurement is accurately based off of original parts. Edited September 8, 2016 by Tommy Styrvoky

[JJ2]

   Here is my latest designed part, it is a 5x7 frame made to hold 3/16 ball bearings. This part will be useful when you want high RPM's going through a differential but don't want the friction involved and the possibility of boring out the holes (Guilty)

   The rounded parts that stick out are half a stud think so it will not be an odd length that interferes with other parts.

https://www.shapeways.com/product/PRS6LM26T/lego-5x7-frame-with-holes-for-3-16-ball-bearings?key=bc0ac1ca44c1d43a560cb81fc1310186

Edited October 28, 2016 by JJ2

[Boxerlego]

That would be the most ingenious thing right there is 3d print Lego Rc compatible parts. Like to see more of this. 

[JJ2]

20 minutes ago, Boxerlego said:

That would be the most ingenious thing right there is 3d print Lego Rc compatible parts. Like to see more of this. 

Thanks, I will be designing more parts soon, do you have any suggestions?

[Tommy Styrvoky]

4 hours ago, JJ2 said:

Thanks, I will be designing more parts soon, do you have any suggestions?

What about adapters for conventional servo motors (like a pin connector with a hole for the control rods, and a mounting bracket for the servo.)

[MangaNOID]

3 hours ago, Tommy Styrvoky said:

What about adapters for conventional servo motors (like a pin connector with a hole for the control rods, and a mounting bracket for the servo.)

yes! 

I've been spending hours and hours the last week trying to mold something to connect a 360 servo with lego.

[JJ2]

4 hours ago, MangaNOID said:

yes! 

I've been spending hours and hours the last week trying to mold something to connect a 360 servo with lego.

Do you mean a servo horn?

8 hours ago, Tommy Styrvoky said:

What about adapters for conventional servo motors (like a pin connector with a hole for the control rods, and a mounting bracket for the servo.)

Efferman has made something of the sort, but I can design a liftarm that can be screwed into to hold it.

I have found out that a 4 stud L beam fits perfectly so you can screw the liftarm to the servo.

[JJ2]

The servo horn is finished

https://www.shapeways.com/product/PTQ38EVU2/lego-technic-servo-horn?optionId=61113788&li=shop-inventory

the axle hole is slightly shorter then a single stud because servo motors are not the same as Lego in length and a full stud might be to long.

[JJ2]

I updated the 12T gear design

https://www.shapeways.com/product/46W7RYBSK/lego-12t-gear-single-bevel?optionId=60659026&li=shop-inventory

The old gear teeth were too thick and the center hold to small. I downloaded a file of the 12t double bevel as my template then I made it a single bevel so it should work.

[PorkyMonster]

7 hours ago, JJ2 said:

I updated the 12T gear design

Based on my limited experience, another gear that often slips (and therefore probably require a 'hardened' version ) is the 20T beveled with the differential housing, when used in either a RWD or FWD model (but in AWD, it's often the 12T within the middle differential that slips).

[JJ2]

11 hours ago, PorkyMonster said:

Based on my limited experience, another gear that often slips (and therefore probably require a 'hardened' version ) is the 20T beveled with the differential housing, when used in either a RWD or FWD model (but in AWD, it's often the 12T within the middle differential that slips).

These gears will not work inside the lego differential, they are flat on the back making them not fit or stay in place, they are mainly to be used for meshing with 20T and 36T gears.

Also the 20T is usually not the one slipping its the diff itself.

[PorkyMonster]

5 hours ago, JJ2 said:

These gears will not work inside the lego differential, they are flat on the back making them not fit or stay in place, they are mainly to be used for meshing with 20T and 36T gears.

Also the 20T is usually not the one slipping its the diff itself.

[2LegoOrNot2Lego...]

These are cool designs, I'm pretty sure some people might want to use this...!

[JJ2]

9 hours ago, 2LegoOrNot2Lego... said:

These are cool designs, I'm pretty sure some people might want to use this...!

Thank you

I updated the 5x7 frame to fit 3/8 x 3/16 bearings because the 5/16 x 3/16 that is was originally made for are a lot more expensive on amazon.

[JJ2]

I have designed another servo horn to fit THIS servo, it has a much smaller output then the standard servo I designed the other one for and has 21 teeth opposed to the 24 teeth of my last one so it did not work.

https://www.shapeways.com/product/JTXKFT35T/lego-technic-servo-horn-21-spline

[JJ2]

I have designed a 20T single bevel because besides the 14T gear, they are the weakest, from my experience.

 

https://www.shapeways.com/product/FBXCMPMNK/lego-20t-gear-single-bevel