Tips on replacing the bearings of my Motors QC-3328

R

Roberto João Lopes Garcia

ROBJLG
Hello

I live in Brazil and I built a cinestar8 (MK) 2-axis gimbal from a kit bought from QuadroCopter. It was a challenge for me since I never did anything, no previous experience with RC air models. It worked! I fly it, I program automatic flights and photos. Everything was good until, in a very very bad day, I got my attention drove to a biplane flight and my multi-rotor falls to the ground from the table it was standing. A wind blast did the job. Shame on me!

Now, the motors make noise, and I think it is the bearings. I start to search how to replace the bearings and found the video: "Replacing brushless motor bearings" made by Bart. Thank you Bart.

The motors are QC-3328 and I intend to use this Ceramic Orange Seal ABEC 7 RC Brushless Motor Bearings from boca bearing ( http://www.bocabearings.com/bearing-inventory/Radial-Bearings/21490/xx-BMK080COS )

Any one knows if Bart still sells his Bearing Press Tool - 4M ?

Some one have used this ceramic bearing?

About the motor QC-3328, is it difficult to replace the bearings? Any tip?

What the size for the snap ring and washers? In another forum they indicate: http://www.amazon.com/gp/product/B0062OEFNQ/ref=oh_details_o03_s00_i00

Any help will be greatly appreciated

Thank you

Roberto
 





Bartman

Bartman

Welcome to MultiRotorForums.com!!
Pumpkinguy said:
I did this vid a while back. Cheers.
Click to expand...
that's pretty much the same thing i did in the video i made when i began producing the bearing press tools that i was selling for a while.

@Roberto João Lopes Garcia you're a persistent fellow!! what is the outer diameter of the bearings in the motors you've got? what is the motor shaft diameter? maybe the tools I made are ok but I need to know the numbers before I can say if the tools will work.

fwiw, you can also buy spacers from mcmaster carr (www.mcmaster.com) and drill them for the shaft diameter and to make sure that pressure isn't applied anywhere except the outer race when pressing the new bearings in. if the OD of the bearings is 10mm then just buy a 10mm OD aluminum spacer and an 8mm drill bit but only drill one side of the spacer and just drill it enough to keep the spacer from contacting the inner race. then drill the spacer if you have to to match the motor shaft diameter (which is also the diameter of the bolt you'll be using to press the bearings in).

i have a bunch of the tools here is anyone wants to order one. i don't plan to make anymore when they're gone though. :(
 

Bartman

Bartman

Welcome to MultiRotorForums.com!!
after i typed that reply i saw in my email that you sent a paypal payment for the bearing press tool. can you just confirm please that your bearings are the right size for the tool?
are the QC3328 motors like the T-Motor MT2814's?
 

C

cootertwo

Member
Getting the bearings out and in, ain't no big problem for me, but fighting those iddy biddy "c" clips drive me cwazy!
 

R

Roberto João Lopes Garcia

ROBJLG
Bartman said:
after i typed that reply i saw in my email that you sent a paypal payment for the bearing press tool. can you just confirm please that your bearings are the right size for the tool?
are the QC3328 motors like the T-Motor MT2814's?
Click to expand...

Bart, I have found some references confirming that the QC-3328 motor are like the T-Motor MT2814.

http://www.bocabearings.com/bearing-inventory/Radial-Bearings/21490/xx-BMK080COS

SMR694C-2OS #7 NB2 ID 4mm x OD 11mm x Width 4mm Dimensions

http://www.rcgroups.com/forums/showthread.php?t=1765963

"4M for the very popular 4mm shaft motors (11mm outside dia. bearings) like the Tiger MT-2814/4006/4008, Avroto 2814, QC-3328, etc."

http://forum.freeflysystems.com/ind...ng-the-bearings-on-a-qc-3328-motor.563/page-2

Thank you

Roberto
 

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