Quick Designation Question

[Monkey Wrench]

I've been wondering this for awhile now. When you see a motor designated as a "540" or "550", be it in a catalog or whatever, what if that referencing? I understand turns and what not, but when I see something like "E-Maxx with twin 550's" I have no frame of reference as to what the "550" means.

Thanks in advance! I appreciate the information!

 

[FastEddy]

I'm not sure how they measure it but the larger the number the larger the physical size of the motor

Someone else may have a more accurate answer.

 

[Lessen]

physical size.

drop the zero and you have the approximate length in mm. I say approximate because they can vary somewhat depending on the motor.. but generally speaking...

a 540 is 54mm long. etc.

 

[MonsterCowpower]

550 class motors have longer cans than 540 motors. Longer can also indicates longer armature,more magnetic wire and MORE TORQUE.

If you compare two morors using identical permanent magnets and the same winding and wire.A 550 will have around 30% more torque.

For example a 540 with an open endbell is 54mm long overall,the armature is around 30mm long.

The 550 class is NOT 55mm long,its over 60mm long! Armature almost 40mm long! The 550 motor like a Trinity Monster MAXX will have boat loads of torque,more than any 540 you can find ,and for trucks,large electric ones the instant torque of two of these 550 over dual 540 is clear.


I just measured these to be sure.

 

[HeartBreak]

I'm sure it has something to do more with the diameter (the first digit) x the length (the last two). For example, a 980 (they exist, check ebay for conversion kits... they're about the size of a soda can) is both bigger and longer than a 540 by almost 2x in each measurement (length, diameter).

I'm thinkin the 5 in 540 refers to the diameter (probably measured across), and the 40 refers to the length. That would explain why a 550 is longer but not bigger around than a 540.

Then again, I could be wrong :shrug:.

edit; here is a link:

http://cgi.ebay.com/Dual-970-Size-M...041600970QQcategoryZ44028QQrdZ1QQcmdZViewItem

 

[MonsterCowpower]

I'm sure it has something to do more with the diameter (the first digit) x the length (the last two). For example, a 980 (they exist, check ebay for conversion kits... they're about the size of a soda can) is both bigger and longer than a 540 by almost 2x in each measurement (length, diameter).

I'm thinkin the 5 in 540 refers to the diameter (probably measured across), and the 40 refers to the length. That would explain why a 550 is longer but not bigger around than a 540.

Then again, I could be wrong :shrug:.

edit; here is a link:

http://cgi.ebay.com/Dual-970-Size-M...041600970QQcategoryZ44028QQrdZ1QQcmdZViewItem

The 5 in 540 does is NOT the diameter,as the 550 and 540 are 35mm in diameter.The rotors in both have also the same diameter.

The comm is the same in both,the endbell is also the same(same can be used in both).Like I said the change is a 10mm longer can,and a 10mm longer armature.

 

[HeartBreak]

True, but applying that measurement theory, the cans should be 540mm long... That would be close to 16 inches or so. The measurements are probably using some arcane form of measurements, or possibly referring to the actual mass of the motor in some wierd measurements, or maybe that's cubic-mm....? Ya know, length x width x depth....?

Again, I'm just guessing at the possible answer - someone out there has to know.

 

[Lessen]

I'm sure it has something to do more with the diameter (the first digit) x the length (the last two). For example, a 980 (they exist, check ebay for conversion kits... they're about the size of a soda can) is both bigger and longer than a 540 by almost 2x in each measurement (length, diameter).

I'm thinkin the 5 in 540 refers to the diameter (probably measured across), and the 40 refers to the length. That would explain why a 550 is longer but not bigger around than a 540.

Then again, I could be wrong :shrug:.

edit; here is a link:

http://cgi.ebay.com/Dual-970-Size-Motor-Power-Pack-for-E-Maxx-12V-18V-DC_W0QQitemZ6041600970QQcategoryZ44028QQrdZ1QQcmdZViewItem

onder2: Did you even bother to read the posts before you replied?

here is where I got my info... http://www.ezonemag.com/pages/faq/a414.shtml

 

[HeartBreak]

Yes, I did, Lesson. Again, I was merely offering up what I thought could be the explanation, with the caviat that I could be wrong. Personally, I had no idea of the reasoning behind the numbers, but thanks to the link, I do now. Thanks.

edit; Clarification: The part in question that I was talking about was the DIAMETER of the motor (hence the difference between, say, a 540 and a 970. They are obviously different in length, and in diameter. How is the diameter denoted? Or even is it? Also, why use "540" and not just "54", if the measurement is only the length.

If I'm sounding like I'm jumping-case, sorry. I don't mean to come off as a *BEEEEEP*. I'm just clarifying the question posed earlier. That's all.

 

[Lessen]

I think the "naming system" is something that was intended to help a user denote a difference of usability and not necessarily to show all specifics of a partcular motor. I don't believe the diameter is takin into consideration for this system. Basically it's just a generic way for people to understand the major difference in size between motors, so when I say i'm lookin at a new 380, you understand what I'm talkin about.

 

[SVORay]

I think the "naming system" is something that was intended to help a user denote a difference of usability and not necessarily to show all specifics of a partcular motor. I don't believe the diameter is takin into consideration for this system. Basically it's just a generic way for people to understand the major difference in size between motors, so when I say i'm lookin at a new 380, you understand what I'm talkin about.

This theroy has my vote.

 

[HeartBreak]

Agreed with Lessen and SVORay. But I still don't get why they went with that particular system. I mean, you have 540's and 550's, same diameter, but larger around and longer than a 380, for example.

All I know is, at least when they say its a '540 class', it is a 540-sized motor.

 

[Lessen]

forgive me but...

same diameter, but larger around

what?

not picking on ya, but that got me confused about what you're saying

 

[MonsterCowpower]

When the diameter is the same it is the same around. :whack:

 

[Lessen]

When the diameter is the same it is the same around. :whack:

are you sure? but what if the radius ISN'T half the diameter?

 

[HeartBreak]

lol, I mean same diameter, shorter/longer. I'm claiming the fact that I'm half-blonde on that one.

edit; I meant that the 540 and 550 are the same diameter, but larger around than the 380.

 

[Lessen]

ooooh... ok, we'll let you slide with the half-blonde excuse this time, but don't let it happen again sonny.

 

[HeartBreak]

Yes boss, I'll behave... and if I don't, you have full permission to lock me in a closet with a redhead that's having a bad day.