General Part Discussion

[HydroWorld Outlook]

6 minutes ago, Danil said:

...

Yeah, I know. It's a lot of math. But hey, that's engineering! 

[braders2]

Hi everyone,

 

I'm planning to upgrade my Toyota Supra MK4 with Buggy Motors, and I'd like to buy a reliable setup right from the start.

 

I'd like to ask those of you who have experience with this kind of build: which brand of Buggy Motors and which remote controller/hub would you recommend? I'm looking for something dependable, with a stable connection and good overall performance.

 

If you have any recommendations for specific brands or models, I'd really appreciate your advice. I'd also be interested to hear about your experiences and if there are any products I should avoid.

 

Thanks in advance for your help!

[1gor]

1 hour ago, braders2 said:

Hi everyone,

 

I'm planning to upgrade my Toyota Supra MK4 with Buggy Motors, and I'd like to buy a reliable setup right from the start.

 

I'd like to ask those of you who have experience with this kind of build: which brand of Buggy Motors and which remote controller/hub would you recommend? I'm looking for something dependable, with a stable connection and good overall performance.

 

If you have any recommendations for specific brands or models, I'd really appreciate your advice. I'd also be interested to hear about your experiences and if there are any products I should avoid.

 

Thanks in advance for your help!

BuWizz

[Timewhatistime]

On 6/26/2026 at 11:27 AM, HydroWorld Outlook said:

 

- Step Count: Unlike the original changeover cylinder, which had exactly 8 steps and two to four short continuous 45° groove waves:

• The red gear shifter drum piece has three slightly-longer continuous 40° groove waves

You mean shorter (not longer), I guess...?

[Ngoc Nguyen]

I've always wondered how exactly the axle hole of this part stays legal. It's supposed to take in an axle, but the end of the axle hole is covered, so wouldn't that make the liftarm part thicker than 0.5 stud? Or does it bend outward slightly?

Edited Tuesday at 02:11 PM by Ngoc Nguyen

[Stereo]

I think it's the same thickness as the usual end-tolerance of a piece - so where a regular "2L" axle is 15.8mm, or a 2x2 brick is 15.8mm square, a 2L stuck into this goes up to 15.9mm.

[aeh5040]

4 hours ago, Stereo said:

I think it's the same thickness as the usual end-tolerance of a piece - so where a regular "2L" axle is 15.8mm, or a 2x2 brick is 15.8mm square, a 2L stuck into this goes up to 15.9mm.

This sounds right. Also the axle itself has a rounded end, so the hole only needs to be full depth right near the centre.

Still, it's somewhat miraculous that it works. I find the pin with bush similarly surprising.

Edited Tuesday at 08:07 PM by aeh5040

[R0Sch]

That's exactly what happens. The axles have rounded ends plus the lengths are just aproximations to full LEGO modules. The real part tolerances enable such assemblies in the first place.

[Zerobricks]

Indeed, the axles are rounded and there's also another important fact. All LEGO parts are usually 0,1 mm thinner from (almost - doesn't apply for height for studded parts) every direction from the ideal 8 mm grid raster. That means a normal pin is around 15,8 mm long. Same applies for beams which are actually even thinner from top to bottom dimension in order to be compatible with studded plates - especially the LEGO logo.

Edited Wednesday at 10:18 PM by Zerobricks

[aeh5040]

To expand on my comment about the pin with stop bush: consider the two parts that it joins together - an axle coming right upto, but not into, a pin hole. If the axle were a perfect cylinder literally just touching a cylindrical hole of the same diameter then it would be impossible to join them together - there would be no space for any material in the gap. The existence of this part rests entirely on the various tiny tolerances (small gaps, rounded axle end, recessed pin holes, cross shaped axle)!

Even though Lego does some things we don't like, we shouldn't lose sight of the exquisite brilliance of designs like this.

Edited yesterday at 01:06 AM by aeh5040