R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 12-21-2008, 11:31 PM   #16
Tech Regular
 
Cory B's Avatar
 
Join Date: Jun 2007
Location: Knoxville, Ia
Posts: 403
Trader Rating: 5 (100%+)
Default

NEVER, NEVER clean your brushless motor with electric motor spray!!!

canned air ONLY!!

bearing oil is good, but NO motor spray!

Happy Wheeling!
__________________
Wild Bill's R/C Hobbies - Knoxville, Ia
Velocity R/C www.velocityrc.net
VWings
AFX Fab
Lancebuilt Hobbies
Cory B is offline   Reply With Quote
Old 12-21-2008, 11:47 PM   #17
Tech Elite
 
trdsupra88's Avatar
 
Join Date: Jul 2007
Location: Southwest
Posts: 2,531
Trader Rating: 25 (100%+)
Send a message via Yahoo to trdsupra88
Default

how do you replace the bearings on the novak r motors(3.5r)? I couldnt seem to get the bearing out of the front of mine...
trdsupra88 is offline   Reply With Quote
Old 12-22-2008, 12:02 AM   #18
Tech Master
 
DRRC's Avatar
 
Join Date: Aug 2007
Posts: 1,505
Trader Rating: 57 (98%+)
Default

been racing my 5.5 in my t4 and a 4.5 in my b44 for 2 yrs now and still good
and it is true NEVER use motor spray on these brushless motors it will have too much moisture for the components in it
compressed air is good enough to clean it and it is basically closed so no dirt should get in it
the only thing that can wear are the bearing again it should not be exposed to the elements unless it is not sealed right

heat is the worse enemy of a BL motor
it can fry the winding in it r warp the rotor
A sintered rotor would be a good mod for a brushless to give it more torque
this is what the AE drivers use in thier cars
I will be changing my 4.5 in my b44 to a 7.5 sintered rotor and would still have the grunt to make jumps but not the rpms and heat that is not needed in offroad racing
I race my 4.5 with a 16t pinion against a friend who has sintered 7.5 and you would not see a difference in speed bec I am geared lower and he has more torque in it so he can gear 2t up from the usual 7.5 gearing
__________________
Team Wife
Mugen Seiki Racing
Mugenracing.com
DRRC is offline   Reply With Quote
Old 12-22-2008, 05:54 AM   #19
Tech Lord
 
Join Date: Jul 2008
Location: Houston, TX
Posts: 11,530
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by Thopper View Post
How hot is too hot? 180F?
I see 200F quoted as the limit for some motors, but I wouldn't want to run that hot.
Duster_360 is offline   Reply With Quote
Old 12-22-2008, 08:39 AM   #20
Tech Elite
 
Join Date: Jun 2008
Location: anywhere I can race 2wd dirt,and 1/12 onroad in MI.
Posts: 3,405
Trader Rating: 39 (100%+)
Default

I have ;
4-novak 17.5's
2 novak 13.5's
1novak ss5800 that has the sintered upgrade
1 novak 8.5

All of them run like new after over a year of use.We have a track at our house so the 17.5's and the 13.5's get used ALOT.

I gear mine using a temp gun.I never run them over 135* .As for maitenance , I clean and oil the bearings every 10 runs.I dont use motor spray on the front bearings though.I use wd 40 after taking the front end bell off,then oil with bearing oil.Then blow out the motor using compressed air. I have never had an issue with the rear bearing since its pretty much sealed, so I just lube it with a couple drops of oil.so far doing things this way I have had no issues out of any of the 8 BL motors I run, and all of them still perform super.
__________________
*Vandal 4wd Late model*XXX-T sprinter*Micro scale specialties 1/24 'rock monster' crawler*MSS Micro-Rail*MSS Micro-Funny*MSS Micro-Outlaw*
2wdMod is offline   Reply With Quote
Old 12-22-2008, 10:06 AM   #21
Tech Champion
 
Krio's Avatar
 
Join Date: Mar 2008
Location: At dirt tracks in Michigan!
Posts: 5,102
Trader Rating: 150 (99%+)
Default

Quote:
Originally Posted by Thopper View Post
How hot is too hot? 180F?
Over 180F the magnet will slightly weaken but is will not be noticeable unless you repeatedly go over 180. Over 200 and the rotor is shot...I had two motors go over 210. With one the spur/pinion and rear diff gear were messed up after a wreck and I kept racing and the other was WAY overgeared after going from a big outdoor track to a very tight high traction track
Fresh rotors=good as new and they are now over a year old.

Quote:
Originally Posted by trdsupra88 View Post
how do you replace the bearings on the novak r motors(3.5r)? I couldnt seem to get the bearing out of the front of mine...
Novak tried to make it so you would have to buy their "bearing replacement kit" which is a whole new endbell. I'll never pay $20 for a pair of bearings so I found some ceramic bearings on ebay for $3 a-peice plus shipping. You really have to pound on the bearing in the endbell to get it out, but it is possible. I used a hex socket as a punch and just put the endbell on a hard surface and was able to tap it out with a hammer. To get the bearing back in I used a plastic mallet and just kept tapping around the edge of the bearing till it was fully seated. Here is the bearing I used:
http://cgi.ebay.com/3-16x1-2-x10-51-...742.m153.l1262
__________________
www.kriostasis.com
Krio is offline   Reply With Quote
Old 12-22-2008, 01:37 PM   #22
Tech Elite
 
ta_man's Avatar
 
Join Date: Nov 2006
Location: New Jersey
Posts: 4,363
Trader Rating: 151 (100%+)
Default

Before you go pounding on it to get the bearing out, heat the endbell as hot as you can with a heat gun. That does two things:

a) It softens tye adhesive used by Novak to hold the bearing in place

b) The aluminum endbell expands more than the steel bearing and makes the press fit a little looser.

Ideally heat it with a heat gun on a block of wood until it is way too hot to touch. Then try removing the bearing.
ta_man is offline   Reply With Quote
Old 12-22-2008, 01:52 PM   #23
tel
Tech Adept
 
Join Date: Feb 2004
Location: Chandler,AZ
Posts: 217
Trader Rating: 8 (100%+)
Default

Once you remove a bearing by pounding on it throw it away as the ball races are surely dented. Installation needs to be by pressure/tapping on the outer race only. I have seen a couple of bearing removal/installation tools. I have the following and it works just fine.

http://rc4less.com/Motors,_Brushed_&...duct_info.html

Other one I know of is:
http://www.nexusracing.com/product_i...eae6f6eb509562
__________________
Travis Lewis
Team Kyosho, Team Orion, Avid RC, JTP RC
tel is online now   Reply With Quote
Old 12-22-2008, 03:10 PM   #24
Tech Elite
 
trdsupra88's Avatar
 
Join Date: Jul 2007
Location: Southwest
Posts: 2,531
Trader Rating: 25 (100%+)
Send a message via Yahoo to trdsupra88
Default

Thanks, I will attempt the heat gun method when I get home...
__________________
I cut my own hair ☆
trdsupra88 is offline   Reply With Quote
Old 12-23-2008, 09:54 AM   #25
Tech Addict
 
Suzukee's Avatar
 
Join Date: May 2008
Posts: 585
Trader Rating: 7 (100%+)
Default

Sorry but I have to repeat this before I next open up my motor for cleaning.

If I do not have compressed air, what is a good way to remove or clean the inside of the motor can?
As mentioned earlier, it's a Orion motor that has opening around the motor can, which I figure has allowed much dust and dirt inside it.

Suggestions?
Pull out the rotor? Leave it alone?
Suzukee is offline   Reply With Quote
Old 12-23-2008, 10:59 AM   #26
Tech Fanatic
 
kenshu's Avatar
 
Join Date: Dec 2004
Posts: 922
Trader Rating: 1 (100%+)
Default

Go to Walmart and get a can of air.
__________________
Ken Schueler
It's better to get the shoe than the boot. SMAC Rules!!!
2012 ROAR Region 8 Stock Buggy Champion!!!
2012 JConcepts Winter Indoor Nationals Stock Buggy Champion!!
2009 ROAR Region 8 Stock Buggy Champion!!
kenshu is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
OC CIRCUIT v.2 Intelligentsia California Racing 10451 06-15-2015 11:29 PM
How long brushed motors will survive? Tbevofreak Electric On-Road 55 01-13-2011 07:12 PM
Why are so many leaving the hobby? olhipster1 Electric On-Road 285 09-11-2008 10:53 AM
Lipo Legalization discoverer188 Electric On-Road 387 06-27-2007 12:05 AM
4 cell mod tourer DirtyDog3375 Electric On-Road 205 10-20-2006 08:08 AM



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 12:22 PM.


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