Max Rpm?

I was wondering if anyone knew the max RPM for the Lehner 1930 series motors. I know the Lehner Basic XL series take up to 65,000RPM.

Let me know,
Joe

[BrianG]

Common rule of thumb is to stick to around 35-40k rpm for best efficiency. You can go higher, but more heat may result. As to the max rpm before stuff starts falling apart; I don't know.

[sjcrss]

almost all of the 19 series lehner motors the max rpm 's is 65,000 rpm's...I run my 1920/8 @ 56,000 and it runs fine....a little warm...but not to bad...

sjcrss what are you running it in and how many volts?

[sjcrss]

I'm running it in my dominator/emaxx hybrid, and it's on 12 cells which = to
14.4*3919 rpm per volt and it comes to 56,433 as the rpm's for the motor..I've ran this motor like this for almost 6 yrs k now and have had it on 16 cells at one time in the same truck....and it weighs about 12-13 lbs..

was it ok with the 16 cells?

[sjcrss]

it little high on the rpm side, but it wa ok......if you want to run the 1920 series motor...I suggest getting a 1920/10 or 1920/11....it will keep your rpm.s i think around 50,000 or so on 16 cells

[squeeforever]

Shoot for more like 35 to 40K RPM's instead. It will run alot cooler and more efficient.

[jhautz]

The mechanical limit is approx. 85,000 rpm for the series 10/15/19

I cut and pasted that from the brushless motor instruction sheet on the lehner website.

Line 2 here...
http://www.lehner-motoren.com/downlo...use_s10-22.doc

Thats the mechanical limit. I wouldnt run it anywhere close to that though. But its nice to know they design for that. :017:

Like everyone has already said... Stick to 35-40K RPM or you just wind up making hot motors and controllers.

I'm looking at the 1930 series motors for a speed challenge car. In this case Im looking to run 60k+rpm's. But Jhautz thanks for that infomations, becasue I thought the mechanical limits are what they suggested on sites - 65000rpm. But now I feel better about running around 65000 as my max and not worrying about an exploding motor.

Thanks guys.

[squeeforever]

Three words....DON'T DO IT! Thats just plain asking for it...

[jhautz]

What vehicle? Is this for some specific race or challenge or just to do it?