R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Reply
 
Thread Tools Search this Thread
Old 11-01-2007, 03:04 PM   #1
Tech Initiate
 
chasot's Avatar
 
Join Date: Oct 2007
Location: North Georgia
Posts: 22
Default Sintered motor?

what is sintered? I have no clue?



Thanks, Chas
chasot is offline   Reply With Quote
Old 11-01-2007, 03:13 PM   #2
Tech Elite
 
Turbo Joe's Avatar
 
Join Date: Nov 2003
Location: Corona, CA
Posts: 4,878
Trader Rating: 41 (100%+)
Default

Quote:
Originally Posted by chasot View Post
what is sintered? I have no clue?
It's a powdered metal technique. It's basically a metal powder that's pressed together into a specific shape.

http://en.wikipedia.org/wiki/Sintering
Turbo Joe is offline   Reply With Quote
Old 11-21-2007, 11:34 AM   #3
Tech Master
 
hyperguy's Avatar
 
Join Date: May 2007
Posts: 1,247
Trader Rating: 22 (100%+)
Default

in a brushless motor (older) they come with a rotor that is covered with a wrap that wears out and you lose power in a BIG way. the new motors come with sintered rotor that does not wear out, and actually creates a lil more power than the old rotors did
hyperguy is offline   Reply With Quote
Old 11-21-2007, 11:52 AM   #4
Tech Regular
 
Doodad's Avatar
 
Join Date: Sep 2007
Location: maybe not.....
Posts: 302
Trader Rating: 1 (100%+)
Send a message via Yahoo to Doodad
Default

Quote:
Originally Posted by Turbo Joe View Post
It's not the coating that wears out, the magnets lose strength when they get too hot.
Or breaks loose from the output shaft. Unless your sitting behind bars, bonded is a dirty word.
Doodad is offline   Reply With Quote
Old 11-21-2007, 11:58 AM   #5
Tech Elite
 
Turbo Joe's Avatar
 
Join Date: Nov 2003
Location: Corona, CA
Posts: 4,878
Trader Rating: 41 (100%+)
Default

Quote:
Originally Posted by hyperguy View Post
in a brushless motor (older) they come with a rotor that is covered with a wrap that wears out and you lose power in a BIG way. the new motors come with sintered rotor that does not wear out, and actually creates a lil more power than the old rotors did
It's not the coating that wears out, the magnets lose strength when they get too hot.
Turbo Joe is offline   Reply With Quote
Old 11-21-2007, 12:07 PM   #6
Tech Champion
 
Davidka's Avatar
 
Join Date: Oct 2004
Posts: 9,930
Trader Rating: 77 (100%+)
Default

Novak bonded rotors have been extremely reliable for me and others. The sintered rotor is meant to be a performance upgrade with the benefit of longer life. I haven't seen any decrease in performance with my bonded rotors and they are two years old. I have a sintered rotor to try but have not felt the need to change.
__________________
"I have no idea what you're talking about, so here's a bunny with a pancake on it's head."

In mind and body, we're all heading towards old age. It is slower to go by bike.
Davidka is offline   Reply With Quote
Old 11-21-2007, 01:33 PM   #7
Tech Regular
 
Doodad's Avatar
 
Join Date: Sep 2007
Location: maybe not.....
Posts: 302
Trader Rating: 1 (100%+)
Send a message via Yahoo to Doodad
Default

The problems w/ the Novak bonded appears to have been addressed. On the other hand, a friend had his LRP rotor start to "unwind" after 2 runs. That stuff looks like baling twine. And what's up with all the posts out of order?
Doodad is offline   Reply With Quote
Old 11-21-2007, 08:45 PM   #8
Tech Champion
 
BuggyKing's Avatar
 
Join Date: Oct 2006
Location: Huntington Beach, Ca
Posts: 7,919
Trader Rating: 17 (100%+)
Default

its a solid rotor and it is more torque then the bonded rotor. Also it allows u to gear up and will run cooler then the bonded rotor. I have had issues with bonded rotors in the past.
__________________
Our government is a #$%$ joke, from the head jester on down
RIP Mike M
BuggyKing is offline   Reply With Quote
Old 11-21-2007, 09:04 PM   #9
Tech Master
 
Join Date: Feb 2007
Location: Mt. Holly, NC
Posts: 1,181
Default

Quote:
Originally Posted by BuggyKing View Post
its a solid rotor and it is more torque then the bonded rotor. Also it allows u to gear up and will run cooler then the bonded rotor. I have had issues with bonded rotors in the past.
The sintered rotor was a huge leap in technology added to sensored brushless systems that made them the choice for longer races due to running so much cooler. Don't even need the fan on the GTB anymore for those 20 minute races.

I would not recommend buying a brushless motor without a sintered rotor in it.
Craps is offline   Reply With Quote
Old 11-22-2007, 11:51 AM   #10
Tech Initiate
 
chasot's Avatar
 
Join Date: Oct 2007
Location: North Georgia
Posts: 22
Default

thanks for all the info.


Chas
chasot is offline   Reply With Quote
Old 11-24-2007, 06:36 AM   #11
Tech Regular
 
gurumods's Avatar
 
Join Date: Feb 2007
Location: New York
Posts: 424
Trader Rating: 13 (100%+)
Default

While we are on this subject,i have a Q.I am looking at the LRP 13.5 Vector X11 BL.It does not say if it is a sintered rotor or not.They do offer a sintered rotor (option) for their X11 series though.The motor has an efficiency rating og 93%.Will the sintered rotor give me a higher efficiency along with the cooler running ??.
gurumods is offline   Reply With Quote
Old 11-24-2007, 05:37 PM   #12
Tech Master
 
Michael#81's Avatar
 
Join Date: Oct 2007
Location: Bedford, IN
Posts: 1,841
Trader Rating: 254 (100%+)
Default

The LRP 13.5 does not come with a sintered rotor. You can buy the upgraded rotor and the ceramic bearings. If you plan on buying the sintered rotor for it you have to also purchase the bearings.

I have 2 13.5 LRP's right now. I installed the rotor and bearing kit in one of them just to try it out. I tried both of the motors in my B4. Here is what I found.

The sintered rotor has a lot more torque and you can gear it a little higher to get more speed and still come out with the same temp as the bonded rotor geared down. I ran 2 six minute mains with the same gearing for both of the motors and the sintered rotor temp was 136 degress and the bonded rotor was 154 degrees. I could tell a little bit of a difference coming out of the corners and some of the smaller jumps the sintered rotor had a little more pop but the lap times were pretty much the same. I think it might have been because the track was a little dusty and slick. When the track is heavy and tacky you can see a big difference in the way the motors get out of the corners. I think the bonded rotor has a little more on the top side but other than that I would use the sintered over the bonded.

Michael
Michael#81 is offline   Reply With Quote
Old 11-24-2007, 09:19 PM   #13
Tech Regular
 
gurumods's Avatar
 
Join Date: Feb 2007
Location: New York
Posts: 424
Trader Rating: 13 (100%+)
Default

Thanks Michael.I did not know about the ceramic bearings.I am gonna ask Santa to get me one of those setups.I just hope i have been a good boy or i might wind up getting a brushed motor
gurumods is offline   Reply With Quote
Old 11-24-2007, 09:28 PM   #14
Tech Master
 
Michael#81's Avatar
 
Join Date: Oct 2007
Location: Bedford, IN
Posts: 1,841
Trader Rating: 254 (100%+)
Default

No Problem, I have a 3 more sets of bearings and rotors on order for my other 13.5, 5.5, and 6.5. I hope it fixes my problems with my 5.5 getting hot.

Michael
Michael#81 is offline   Reply With Quote
Old 01-16-2008, 11:41 AM   #15
Tech Regular
 
JEFFRO503's Avatar
 
Join Date: Apr 2005
Location: St Helen's OR
Posts: 462
Trader Rating: 9 (100%+)
Default

Michael#81 : I just came across this older thread and wanted to ask....where do you order the "sintered rotor" from? I'm thinking of getting either the vector11X 7.5 or 6.5 and want to do this upgrade as well. I went to the AE website and i didn't see any parts options for this and the LRP site is down at the moment.

any suggestions would be good if you know of other places who sell the sintered upgrade. Thanks man.


Jeff
JEFFRO503 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
LRP SHERE TC WITH 13.5 SINTERED MOTOR Beev 30 Australia For Sale/Trade 1 07-30-2008 12:34 AM
FS: Novak 13.5 Sintered motor air23JM R/C Items: For Sale/Trade 4 02-17-2008 03:55 PM
Novak 13.5 brushless motor, w/ sintered ALJR R/C Items: For Sale/Trade 3 09-15-2007 11:33 AM
GTB 4.5 SINTERED MOTOR 16skyline Electric On-Road 7 08-20-2007 10:13 AM
GTB with 13.5 motor - sintered - getting out sellout olhipster1 R/C Items: For Sale/Trade 9 07-09-2007 08:57 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 07:19 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net