New Products - May 2022 (EXP Products for V5)

I was literally manufacturing these myself from the square bore ones… thanks for actually selling them now.

4 Likes

So would those count towards the plastic sheet limit?

4 Likes

lmao vex may have just opened the floodgates on this one…

1 Like

My coach said that he messed around with them at worlds and they are really thin. Draw your own conclusions.

1 Like

:frowning:

When will we see(?) new anti static 2.75s?

5 Likes

If/when will we see 24, 48, and 72 tooth gears in a low strength profile? Certainly there won’t be just a high strength profile for only these three types of gears, because that would not follow the previous pattern of all gears having low strength and high strength equivalents.

1 Like

This is going to be sooooo useful!!!

Ok, I would assume it would not.

I think the wording of “Custom-Made” would make this exempt from R9

-Vex official website
So It should be perfectly legal to use as much of this as you want. The issue might be if you cut it or make modification. then it will be up the QnA to decide that.

3 Likes

There is no reason this would be an issue. These are legal VEX parts. Use as many as you like. Modify them how you like. No different then other VEX parts.

6 Likes

I feel like it could be that it might then become defined as a custom plastic part

It would not be. You are allowed to modify any official VEX parts (except those that are excluded, such as electronics and pneumatics). If you took a gear and cut it down until it was just a piece of flat plastic it would not suddenly become a custom plastic part counting towards your plastic allotment, it would just be a modified gear. This is no different.

12 Likes

VEX seems to be shifting away from all of the low strength options, and leaning more into the high strength accessories. Gears, wheels, and more are receiving the “low strength” → “high strength” makeover. It’s unlikely that these gear sizes will receive low strength options.

VEX released high strength gears after they released the low strength gears, then made a V2 of the said high strength gears, not revamping the low strength gears at all. This, as well as all of the following product changes recently, have led me to believe that VEX is encouraging everything high strength. Following this theme, it seems unlikely that VEX will release low strength gears of the 24, 48, and 72 gears.

3 Likes

Is this going to have increased friction on low strength shafts compared to the plastic high strength round adapters?

This new one is made of metal, the old ones were made of plastic.

With the metal on metal action, would this new product be susceptible to grinding and increased friction?

2 Likes

You might have noticed that the round bore is nor only round, but also different color. I.e. different metal. That’s a very important detail. The round bore could be made of brass, but most likely it’s made of “bearing bronze”, a special composition metal used, well, for bearings. You most likely have a few bronze bearings in the PC you’re reading this message on, they are often used in computer fans. And about everywhere, when you need a bearing, but can’t really go all the way with ball bearing.

16 Likes

BTW: It would be great if VEX stated that on the product page. We’re educating future engineers and we want them to know why, not only how.

I might assume it’s just a matter of time before the material is added, since it is listed for older components.

6 Likes

Yep, good call.

For future reference,

  • The square bore (276-8235) is SMF 5040 Steel.

  • The round bore (276-8034) is Sintered Bronze.

I’ll add this information to the product page.

20 Likes

5 Likes

May I ask why Bronze? Like what advantages does it give?

2 Likes

Bronze, an alloy of copper and tin, is a common bearing material because it is hard, strong, and wear resistant. When making a sleeve bearing, which is a “sliding bearing” rather than a “roller bearing”, it is important that the bearing material be slightly softer than the shaft material, so that the wear will be in the bearing rather than the shaft. Bronze has an additional property that it doesn’t gall (or stick) to the steel, which would pull of microscopic bits of material during wear. Rather, it wears away very slowly (especially if lubricated a bit), while offering a low coefficient of friction against the steel shaft.

(To learn more, you can take Materials 101 class at Monroe County Community College :slight_smile: )

28 Likes

Besides that, it is sintered bronze, which means it is slightly porous. You can infuse the pores with lubricant for even better properties.

8 Likes