Turnigy 80-100-B 130Kv Torque rating?

[damonjackson_spl]

I am ordering my the one way bearings for my single stage reduction..

EDIT***** now duel stage reduction.

I have found a good bearing but I want to see if it is up to the job..

I got the equation to calculate the nm of torque for the single reduction but I need the torque rating for the motor?

I have googled it with poor results..

anyone know the torque?

cheers

D

[adrian_sm]

This might help:
http://endless-sphere.com/forums/viewtopic.php?f=10&t=18609&start=15#p273455

Luckily, there is a fixed relationship (for a PM motor) between the voltage constant, Kv, and the torque constant, Kt. If you know Kv you can work out Kt fairly easily. Here is the formula, for Kt in N-m per amp:

Kt (N-m/amp) = 9.5478 / Kv

so, if you have a PM motor with a Kv of 50, then it's Kt = 9.5478 / 50 = 0.191 N-m/amp

So for your 130Kv motor, your Kt = 0.073 N.m/Amp.

The question then is ... How many amps are you going to throw at it?

[damonjackson_spl]

SUPER!!!

cheers adrian, looking at 7.3nM, this beaing I found is 12.2nM, so just got to calculate using my gear ratio...

hmmmmm

[liveforphysics]

Also, keep in mind, Kt calculation ONLY depends on phase current, and you have no idea what your phase amps will be (with this motor, it's common to be 5x higher than battery current).

[dontsendbubbamail]

I am ordering my the one way bearings for my single stage reduction..

I have found a good bearing but I want to see if it is up to the job..

I got the equation to calculate the nm of torque for the single reduction but I need the torque rating for the motor?

I have googled it with poor results..

anyone know the torque?

cheers

D

How about a link to the bearing you found?

Bubba

[damonjackson_spl]

How about a link to the bearing you found?

Bubba

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=130293315445&ssPageName=STRK:MEWNX:IT

[Miles]

Drawn cup roller clutch specifications:

[adrian_sm]

Check out the list of main applications on page 3.

NSK_Drawn_Cup_Roller_Clutch.png

(33.17 KiB) Downloaded 164 times

[Miles]

[dontsendbubbamail]

The clutch that you found needs to run on a hardened shaft and the motor shaft on the 80-100 is not hardened. Several years ago I looked at this type of clutch, but they did not calculate out to be strong enough for a single stage system. I not a mech eng so maybe I calculated wrong.

Bubba

[damonjackson_spl]

The clutch that you found needs to run on a hardened shaft and the motor shaft on the 80-100 is not hardened. Several years ago I looked at this type of clutch, but they did not calculate out to be strong enough for a single stage system. I not a mech eng so maybe I calculated wrong.

Bubba

The one way bearing is going onto my 44t pulley which is 6mm which ill lathe out to press in the bearing and installed on a hardened 12mm shaft

[mainsource]

i have ordered the exact same motor but it has not yet arrived... what is the drive shaft diameter? what is the belt width, series-model and teeth counts of the timing belt pulleys that you are running? do you have a link to the source of the pulleys?

cheers, keith.

[damonjackson_spl]

I think most of the US lads use mcmaster for pulleys.

Im in aus so I used eBay.

I used T5 16mm pulleys and belts all 6mm id so I can lathe them out to either 12mm for the shaft or 18mm for the clutch. my bro is a fitter and turner and said hollowing out a 15t pulley to 12mm is probably the max u can go!! For the other pulley go 60t, I went 44t cause that is all the seller had in 16mm width.

[mainsource]

thanks for the very useful info... am in Canada but i should still be able to access mc master karr (presumably thats the company to which you refer?)... did you actually turn the 15T to accept 12mm yet?,, did it turn out ok (regarding room for set screws etc)?

cheers...

[Jeremy Harris]

For pulleys in the US/Canada I think you're probably best using SDP/SI: http://sdp-si.com/ as they seem to have far and away the biggest selection. Even my local supplier here in the UK seems to just stock the SDP/SI range.

The best pulley type, in terms of size for a given torque rating, seems to be the HTD series, or maybe the Gates GT2 series, rather than the older rectangular tooth T series used for timing belts. I've used 5M series belts and also the smaller 3M series for some lower power applications and they seem more efficient and transmit more power than the T series belts.

Jeremy

[Miles]

am in Canada but i should still be able to access mc master karr (presumably thats the company to which you refer?)... did you actually turn the 15T to accept 12mm yet?,, did it turn out ok (regarding room for set screws etc)?

http://www.sdp-si.com/ and http://www.pfeiferindustries.com/custom_design.htm are good sources for drive parts.

You want GT2 or GT3 5M (8M if used for the final stage).

If you drill out 15t to 12mm bore, you may have to drill and tap new set screw holes through the teeth.

Ed. Jeremy beat me to it

[damonjackson_spl]

Yeah I keen to see how the T series go. regarding the 15t I'm getting my bro to check it out. I think he was going to press the pulley on and use locktite but he did ask the torque rating if the motor so he can calculate how to tackle the job.

I like having him around as real technical experience trumps academic speculation which I get into trouble allot for.

[mainsource]

Fabulous website guys... and not just for pulleys... Whats a typical belt width for the 1st stage of motor speed reduction (drive motor to jack-shaft)?

[dontsendbubbamail]

Fabulous website guys... and not just for pulleys... Whats a typical belt width for the 1st stage of motor speed reduction (drive motor to jack-shaft)?

15mm

Bubba