Jan 10, 2010

New(er) Style Tread Links

A friend of mine, John Brost, recently asked me if I had noticed that there were two types of the new tread links out there. Surprise surprise, it seems LEGO has modified the mold slightly. The new tread links will work fine with the old ones - there's no difference in the parts that connect link to link. However, some small new "bumps" on the new treads do change a few things for robot builders. First, they tend to make the side-to-side stability a little better (a good thing). Second, it means that using them "backwards" to form large wheels now works only with still larger diameters. Mixing them in an alternating fashion makes small "old style" (?) tread link wheels work... but you'd have to pay very careful attention to make sure multiple "new style" links aren't adjacent, or you might end up with flat places in your wheels. As to the why for this, it might have been to increase the side-to-side stability, or it might have been to allow better flow in the molds and less rejects due to bubbles (suggested by Bryan Bonahoom, who knows much more about these things).

Now, if they would just come out with a rubber "shoe" for these links...

6 comments:

lacagirlsg said...

Sorry for my bad english :(. I've noticed now, that the 8263 Snow groomer the newer tracks has and the 8275 Bulldozer the olders. On the left side, the 8263 treads have a number: 5518. The 8275 treads hav also a number: 57518. Interesting, is it not?

Nathan said...

Hmm, interesting... *checks Mindstorms box* I have the old-style, which works perfectly fine for me.

Spacedude

Sean Lewis said...

I would like to see these used backwards as a Wheel. Does anyone have an Example picture of these treads being used like that?

Sean Lewis said...

I would like to see these treads being used backwards as a tire. Dies anyone have an example of this? (Picture)

megamindstorm101 said...

Sean Lewis the picture is right there the bigger ones are new and the smaller one is old.

Robotica said...

see also:

technicbricks.blogspot.com

Martyn

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