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04-17-2010, 07:44 PM | #1 |
Quarry Creeper Join Date: Apr 2010 Location: Hells Hole
Posts: 221
| Understanding motor turns
I am totaly confused on what motor turns mean , at first i was told the lower number of turns means slower speed and higher torque. but i see 35 to 55 turn motors being used in crawlers so i must have been told wrong. Also what is the difference between hand wound motor and machine wound motors as far as quality and performaence is concerned.
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04-17-2010, 07:53 PM | #2 |
Pebble Pounder Join Date: Dec 2009 Location: Earth
Posts: 121
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The lower the number of turns the slower it is and the higher the torque. Because torque is so important in a crawler you see a lot of people use a 55T. BUT a 55T has low speed so some people will go up to a 45T or 35T for the wheel speed. Which can also be important in some situations. It can also change based on the battery you have. You'll have less punch and speed with a nicd 7.4v battery than you will with a 3S lipo.
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04-17-2010, 08:04 PM | #3 | |
Newbie Join Date: Feb 2010 Location: Ronkonkoma
Posts: 42
| Quote:
SINTERED ROTOR MOTORS 21.5 - Slowest Motor (comparable to a 55 turn lathe or crawler motor) 18.5 - similar to a 45 or 35 turn lathe or crawler motor 17.5 - Very close to a 27 turn stock motor 13.5 - Slightly faster than a 27 turn stock motor 10.5 - Slightly faster than a 19 turn motor 8.5 - 13-15 turn motor 7.5 - 11-12 turn motor 6.5 - 10-11 turn motor 5.5 - 9-10 turn motor 4.5 - 8-9 turn motor 3.5 - 7-6 turn motor BONDED ROTOR MOTORS EX13.5 - Close to a 27 turn stock motor SS4300 = EX10.5 - Close to a 19 turn motor SS5800 = EX8.5 - 15-17 turn motor Brushed Motors 55 Turn = slow 7 Turn = fast Machine wound = done by a machine (cheaper motor) Hand wound = done by a person (expensive) | |
04-17-2010, 08:08 PM | #4 | |
Pebble Pounder Join Date: Jan 2006 Location: Brockville
Posts: 128
| Quote:
and iam not sure the differnce in machine vs hand wound...iam assuming hand wound should be better quality.. every motor is checked.. machine wound, maybe every other or even every 50th motor would be inspected. Last edited by guywithhat; 04-17-2010 at 08:11 PM. | |
04-17-2010, 08:10 PM | #5 |
Quarry Creeper Join Date: Apr 2010 Location: Hells Hole
Posts: 221
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ok so i had the turn therory backwards , as far as hand vs machine is there a performance difference.
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04-17-2010, 08:12 PM | #6 |
Pebble Pounder Join Date: Jan 2006 Location: Brockville
Posts: 128
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quality would be the big difference.... and like lidebt2 said.. hand wound more expensive... payin a guy to wrap each armiture one at a time vs. payin the same guy to sit and run a machine that does all the work..
Last edited by guywithhat; 04-17-2010 at 08:14 PM. |
04-17-2010, 08:30 PM | #7 | |
TEAM MODERATOR Join Date: May 2004 Location: Tennessee
Posts: 10,855
| Quote:
Some of the key traits in a good hand wound motor.... Bigger comms Truer comms Better hood design Better quality magnets Better brush styles Balanced armature Better can design All of which can contribute to better bottom end power,quicker response and longer life. Personally,I prefer Holmes Hobbies handwounds. He's got a few different handwounds to choose from. IMHO,they are some of the best motors out there. | |
04-18-2010, 06:17 AM | #8 |
Quarry Creeper Join Date: Apr 2010 Location: Hells Hole
Posts: 221
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thanks guys , didn't realize how much there was to picking a motor.
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02-12-2014, 08:10 PM | #9 |
Newbie Join Date: Jan 2014 Location: NC
Posts: 26
| Re: Understanding motor turns
Besides the produce way(man or machine) and price, what's the difference between machine wound and hand wound?
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02-12-2014, 08:29 PM | #10 | ||
I wanna be Dave Join Date: Jul 2009 Location: Rancho Relaxo. California. USA. Earth.
Posts: 3,292
| Re: Understanding motor turns Quote:
Quote:
Off topic: Holy zombie thread, hey at least some people do search | ||
02-18-2014, 12:11 PM | #11 | |
Rock Stacker Join Date: Feb 2014 Location: Minneapolis
Posts: 72
| Re: Understanding motor turns Quote:
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02-20-2014, 12:05 PM | #12 |
Pebble Pounder Join Date: Jan 2014 Location: Knoxville
Posts: 131
| Re: Understanding motor turns
Don't forget that batteries also affect motor speed. A 45t motor with a two cell lipo battery will be slower and have more torque than a 27t motor on the same battery. But, a 45t motor on a three cell lipo battery will be almost as fast as the 27t with the two cell. Remember, sometimes torque gets you over obstacles and some times wheel speed gets you over obstacles. A good mix of both is what we all need.
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02-20-2014, 03:28 PM | #13 | |
Newbie Join Date: Dec 2013 Location: Monticello
Posts: 37
| Re: Understanding motor turns Quote:
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02-20-2014, 03:30 PM | #14 | |
Newbie Join Date: Dec 2013 Location: Monticello
Posts: 37
| Re: Understanding motor turns Quote:
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04-18-2016, 07:08 PM | #15 |
Newbie Join Date: Jan 2016 Location: Marquette
Posts: 1
| Re: Understanding motor turns
Thanks Guys nice easy explanations...
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04-19-2016, 07:27 AM | #16 |
Quarry Creeper Join Date: Jun 2015 Location: Athol, Massachusetts
Posts: 386
| Re: Understanding motor turns
Higher turn dont always mean more torque. Better start up, slower top speed, and longer battery life mostly. A good hand wound will have the wire contact pattern optimized for better performance its an art form. Pick a wheel speed you like for the volts your gonna use and get the best motor you can afford thats how i pick them. Oh yeah Holmes or Brood best brushed going. Last edited by 351Beno; 04-19-2016 at 08:54 PM. |
04-20-2016, 12:35 AM | #17 |
Quarry Creeper Join Date: Oct 2012 Location: Malang, Indonesia
Posts: 338
| Re: Understanding motor turns
axial scx10 brushed stock motor is 27T CMIIW |
04-21-2016, 07:36 AM | #18 |
Newbie Join Date: Apr 2016 Location: Gainesville
Posts: 43
| Re: Understanding motor turns
In continuing the zombie thread (great find BTW). How does KV fit into this mix? Seems like for brushless people are saying to get 3300kv or 3500kv or whatever. How does that compare to the turns? Thanks! |
04-21-2016, 08:30 AM | #19 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Re: Understanding motor turns
Besides price and construction, a handwound will produce a lot more torque and typically have better startup control. My machine wound motors have great startup too since they were designed as such, but do feel "mushy" under load compared to a handwound. The mushiness makes startup more difficult to control, when the motor is unloaded it will increase in RPMs more, which can cause the rig to surge off the intended line. Brushed motors can vary quite a bit in unloaded speed between styles of motors, so sealed can 27t might be faster unloaded than a Pro handwound, but slower than the handwound when in a rig. Loaded RPMs VS unloaded rpms will be lower as compared to brushless of a similar KV. But these are general numbers useful for comparison of speed. 10t five slot 550 (crawlmaster style) 2300kv unloaded 12t five slot 550 1700kv unloaded 13t five slot 540 2300kv unloaded 16t five slot 540 1700kv unloaded 27t is about 540 2100kv unloaded 35t is about 540 1500kv unloaded 55t is about 540 1000kv unloaded |
04-21-2016, 08:49 AM | #20 |
Newbie Join Date: Apr 2016 Location: Gainesville
Posts: 43
| Re: Understanding motor turns
So if my understanding is correct... for brushed the HIGHER the number the more torque there is and the slower the top speed. For brushless, the LOWER the kv the more torque and slower top speed. Thanks! Now I just need to figure out which brushless gives OK crawling and OK speed (25mph tops on 3s). More research! |
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