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I refer to these types of brackets as servo brackets, or robot brackets:

Short U and Multi Function servo brackets

I know that the two specific brackets, shown above, are known as a short-U (some vendors refer to them as "C", en lieu of "U") and a multi-function bracket, respectively, and that there are other types available, namely:

  • Long U bracket
  • Oblique U bracket
  • i bracket
  • L bracket
  • etc.

However, I am sure that there is a correct name for these types of bracket (or this range of bracket, if you will), rather than just servo brackets - either a generic name or a brand name. I have seen the term once before, on a random web page, but the name escapes me. They are either named after their creator, or, if I recall correctly, the institution where they were developed.

Does anyone have a definitive answer, preferably with a citation or web reference, or a little historical background?

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  • $\begingroup$ Fitting could be an option? $\endgroup$
    – Gürkan Çetin
    Mar 21, 2016 at 19:29
  • $\begingroup$ Have you tried contacting the vendors of these items? I'm sure they would be able to address your question much more readily. $\endgroup$
    – Paul
    Mar 21, 2016 at 21:30
  • $\begingroup$ @Paul - I have. However, the vendors, from whom I obtain my parts, and with whom I am familiar, are all based in China... and use a variety of unusual terms for them, few of which are grammatically correct. When I ask where they obtained their patterns from, invariably the response is that they copied them from another vendor on eBay. $\endgroup$
    – Greenonline
    Mar 23, 2016 at 4:24

2 Answers 2

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After some extensive searching, I believe that they are called Servo Erector Set (SES) brackets, from Lynxmotion, although the article itself also uses the term servo brackets.

About the Servo Erector Set

Think of the Lynxmotion series of servo brackets as an Erector Set for servos. These components are extremely versatile, making virtually any mechanical arrangement possible. It's now possible to build custom robots to your specifications! The brackets are available in black anodized aluminum. The ball bearings provide for precise low friction movement. The tubing, hubs and hub connectors are precision fit and really expand what is possible to build. They are made in the USA from high quality aluminum alloy. We also have a series of laser cut Lexan chassis, torso, and electronics carriers that truly complete the set.

If you want to build a variety of different robots using the SES system, consider the complete SES V1.1 Construction Kit which contains everything you need to get started.

The article also refers to them as Hitec servo brackets.

Hitec Servo Brackets

Our selection of standard brackets can use most standard size Hitec analog or digital servos. The HS-3xx, 4xx, 5xx, 6xx, 54xx, 56xx, and 59xx servos are verified to fit. Note that servos from other manufacturers are not guaranteed (nor likely) to work...

So, the term SES may only be referring to the kit of various Hitec servo brackets.

The first place that I saw the term SES, was on the page, WALKER8 – An Octopod Project, where it is mentioned in the comment:

I decided to go with the SES route

This may not be the most definitive answer, but it is the best that I could come up with. Maybe the answer is simply [Hitec] servo brackets, as the brackets were first designed to fit Hitec servos, and their derivatives.

Whether or not the brackets where designed by Hitec themselves, or some other third party is not clear.

If someone else knows, or has an idea of, a better answer, please post it.

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There is no correct name for sheetmetal brackets designed for connecting hobby servos. Using sheetmetal, bent with holes, has been used forever for hobby projects (and industrial ones). It's cheap and easy to have the tools to make custom ones in your garage.

The first usage of brackets like your pic with servos that I saw was Robo One, but I don't follow the hobby/toy market closely.

For hobby servo robotics there was Lynxmotion in 1996 but his techniques were in common use for hobby robotics at the time in custom projects.

For punched and bent sheet metal, erector sets come to mind, started being sold in 1913 and apparently had an electric motor you could build. Meccano Started in 1901.

Regarding the U shape, mechanical engineers call this a clevis when used as a structural or connecting element.

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  • $\begingroup$ Really? That is rather disappointing. Maybe I have been over thinking this then. Would you happen to know who actually came up with the designs? Was it Hitec themselves, another third party, or was it a collaborative effort which made the current designs evolve over time? $\endgroup$
    – Greenonline
    Mar 27, 2016 at 0:49

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