Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters


500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


Reply
 
Thread Tools Display Modes
Old 09-01-2011, 02:59 PM   #21
superrmario
Registered Users
 
Posts: 429
 

Join Date: Jun 2011
Location: NJ
Default

Any ideas on up an down slop in a 500mx??

I had a pretty bad crash unexpected and didn't hit hold till after impact.



Sent from my DROIDX using Tapatalk
superrmario is offline        Reply With Quote
Old 09-05-2011, 09:53 PM   #22
davehour
Registered Users
 

Join Date: Dec 2004
Location: Guayama, Puerto Rico 00785
Default

Mine is brand new and has an axial play of about 0.5mm.

I think this might be the culprit of bearing/shaft problems being reported. I'll take mine off and apply green loctite between the bearings and shaft, or just a shim to fix the axial play.

David
__________________
T-Rex 700E Pro DFC, Ikon, Futaba R6203SB/8FGHS
Blade mCPx 140mm boom, DX7
RealFlight 7
davehour is online now        Reply With Quote
Old 09-05-2011, 10:20 PM   #23
superrmario
Registered Users
 
Posts: 429
 

Join Date: Jun 2011
Location: NJ
Default

Quote:
Originally Posted by davehour View Post
Mine is brand new and has an axial play of about 0.5mm.

I think this might be the culprit of bearing/shaft problems being reported. I'll take mine off and apply green loctite between the bearings and shaft, or just a shim to fix the axial play.

David
Right on.

My motor has about 2mm of play.

Sent from my SCH-I510 using Tapatalk
superrmario is offline        Reply With Quote
Old 09-06-2011, 01:28 PM   #24
davehour
Registered Users
 

Join Date: Dec 2004
Location: Guayama, Puerto Rico 00785
Default

Ok guys,

Went through the whole process of disassembling and assembling the 500MX to fix the axial play it had. As shown in the pictures, the axial play of my 500MX was 0.23mm. You can check the amount of axial play by first measuring the gap between the top of the motor and pinion bottom at rest, and then pull the rotor case and the startor apart, and measure the resulting gap.

To fix the axial play in my 500MX motor, I installed a 5 X 7 X 0.2mm shim (this shim is one of the shims that come in the 600EFL Pro kit to eliminate the axial play in the elevator arm shaft). Please note I didn't use green anaerobic compound between the shaft and bearings because with the use of the shim, the shaft will be tight between the bearings and will not slip on them. As we know, the rest of the MX motors family (600MX, 700MX, etc), don't exhibit the problems the 500MX has with the shaft and bearings. In fact, those motors don't come with axial play nor anaerobic compound between the shaft and bearings.

Here is an explanation of the process and pictures:

1. Measure the gap between the top of the motor and pinion bottom at rest, and then pull the rotor case and the startor apart, and measure the resulting gap. The difference is the amount of axial play present. Find a shim with the approximate thickness of the amount of play.

2. Remove pinion from the motor.

3. Looking through the cooling slots of the motor, locate the grub screw. Using a 2.0mm Allen wrench, remove the grub screw. Make sure the Allen wrench holds the screw securely while removing it from the motor casing to avoid loosing it due to the magnets force. In the disassembling steps, this is not critical because if it's taken by the magnets, you can recover it when the motor is taken apart. But, in the assembling steps, it's critical because if you loose it, you will have no other choice but to take the motor apart again to recover it.

4. Using an arbor press, position the motor as show in in the pictures. Use a shaft to push the motor shaft from the casing. If you don't have an arbor press, a vise and a set of sockets can be used.

5. After pulling the shaft off the motor, pull the startor and rotor apart carefully. You can rest both in a table to have a stable pulling force.

6. Pictures show the lower and upper bearings. Now you can remove the bearings using the appropriate items to pull them from the motor.

7. My 500MX had only two flights at the time I disassembled it. You can see the mark produced due to the shaft slipping on the top bearing. No doubt they were going to fail later on.

8. The bottom of the shaft of my 500MX doesn't have a flat surface on it, but a hole made where the grub screw goes in.

9. Find a shim with the thickness of the amount of axial play present.

10. If you want, you can use the R48 anaerobic compound between the shaft and the bearings. Please, make sure the remove any oil/grease present. The T43 is lock threading compound to be used in the grub screw.

11. Make a mark at the top of the shaft collinear with the grub screw hole at the bottom. This will be used to align the shaft and motor casing grub screw hole when putting back the shaft in the motor case.

12. Install the shaft with the shim. Make sure the mark made in the previous step is in-line with the grub screw hole of the casing.

13. Using an arbor press or similar device, start pressing the shaft onto the motor assembly. Make sure the shaft is started aligned on the casing.

14. Press the shaft in until the shaft collar bottoms out on the top bearing. Do not apply excessive for when pressing the shaft, or the top bearing will be damaged.

15. Using compressed air, clean the inside of the motor to remove debris.

16. Install the grub screw. Use T43 or equivalent thread locking compound. Make sure the Allen wrench holds the screw securely to avoid loosing it due to the magnets force. If it's taken by the magnets, you will have no other choice but to take the motor apart again to recover it.

17. Viola! Motor without any axial play.

18. The use of a magnifying device helps a lot in the process. Shown is my OptiVisor with a 5X len.

Hope this help.

David
Attached Thumbnails
Click image for larger version

Name:	IMG_3923 (Large).JPG
Views:	554
Size:	104.5 KB
ID:	251671   Click image for larger version

Name:	IMG_3924 (Large).JPG
Views:	506
Size:	112.7 KB
ID:	251672   Click image for larger version

Name:	IMG_3925 (Large).JPG
Views:	464
Size:	100.3 KB
ID:	251673   Click image for larger version

Name:	IMG_3920 (Large).JPG
Views:	446
Size:	91.4 KB
ID:	251674   Click image for larger version

Name:	IMG_3965 (Large).JPG
Views:	475
Size:	100.4 KB
ID:	251675  

Click image for larger version

Name:	IMG_3927 (Large).JPG
Views:	591
Size:	103.8 KB
ID:	251676   Click image for larger version

Name:	IMG_3931 (Large).JPG
Views:	555
Size:	98.8 KB
ID:	251677   Click image for larger version

Name:	IMG_3933 (Large).JPG
Views:	554
Size:	95.1 KB
ID:	251678   Click image for larger version

Name:	IMG_3934 (Large).JPG
Views:	560
Size:	103.8 KB
ID:	251679   Click image for larger version

Name:	IMG_3936 (Large).JPG
Views:	537
Size:	106.3 KB
ID:	251680  

Click image for larger version

Name:	IMG_3941 (Large).JPG
Views:	527
Size:	62.6 KB
ID:	251681   Click image for larger version

Name:	IMG_3943 (Large).JPG
Views:	516
Size:	63.3 KB
ID:	251682   Click image for larger version

Name:	IMG_3944 (Large).JPG
Views:	581
Size:	101.8 KB
ID:	251683   Click image for larger version

Name:	IMG_3945 (Large).JPG
Views:	538
Size:	93.0 KB
ID:	251684   Click image for larger version

Name:	IMG_3947 (Large).JPG
Views:	508
Size:	110.4 KB
ID:	251685  

__________________
T-Rex 700E Pro DFC, Ikon, Futaba R6203SB/8FGHS
Blade mCPx 140mm boom, DX7
RealFlight 7

Last edited by davehour; 09-06-2011 at 07:28 PM..
davehour is online now        Reply With Quote
Old 09-06-2011, 01:34 PM   #25
davehour
Registered Users
 

Join Date: Dec 2004
Location: Guayama, Puerto Rico 00785
Default

Continuation...
Attached Thumbnails
Click image for larger version

Name:	IMG_3950 (Large).JPG
Views:	315
Size:	104.0 KB
ID:	251687   Click image for larger version

Name:	IMG_3951 (Large).JPG
Views:	320
Size:	67.2 KB
ID:	251688   Click image for larger version

Name:	IMG_3969 (Large).JPG
Views:	312
Size:	94.9 KB
ID:	251697   Click image for larger version

Name:	IMG_3954 (Large).JPG
Views:	306
Size:	107.0 KB
ID:	251698   Click image for larger version

Name:	IMG_3962 (Large).JPG
Views:	366
Size:	102.5 KB
ID:	251699  

Click image for larger version

Name:	IMG_3964 (Large).JPG
Views:	335
Size:	96.9 KB
ID:	251700   Click image for larger version

Name:	IMG_3967 (Large).JPG
Views:	355
Size:	100.8 KB
ID:	251701   Click image for larger version

Name:	IMG_3968 (Large).JPG
Views:	306
Size:	104.6 KB
ID:	251702   Click image for larger version

Name:	IMG_3970 (Large).JPG
Views:	343
Size:	86.4 KB
ID:	251703  
__________________
T-Rex 700E Pro DFC, Ikon, Futaba R6203SB/8FGHS
Blade mCPx 140mm boom, DX7
RealFlight 7
davehour is online now        Reply With Quote
Old 08-27-2013, 11:13 AM   #26
jabu32
Registered Users
 
Posts: 2,179
 
My HF Map location
Join Date: Jan 2011
Location: Indianapolis, IN
Default

http://www.bocabearings.com/search.a...=500MX&Feature

are the orange sealed bearings the ones that everyone uses?
__________________
Hello My Name Is Joe
Blade mCP X V1 BL - HP06V2 / Blade 130X - Lynx EOX / Blade 300x - AR7200BX, 2213-3585 / Blade 400 - DS760, 450MX / Trex 500ESP DFC - AR7200BX, 500MX / Trex 550e DFC - AR7200BX, 600MX / X525 Quad / DX8
jabu32 is offline        Reply With Quote
Old 08-28-2013, 02:14 PM   #27
Trexwilly
Registered Users
 
Posts: 4,168
 

Join Date: Feb 2010
Location: USA
Default

I just used the Align kit...
__________________
Fly... crash... rebuild... repeat... Fly hard my friends!
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Trexwilly is online now        Reply With Quote
Old 08-29-2013, 07:12 AM   #28
jabu32
Registered Users
 
Posts: 2,179
 
My HF Map location
Join Date: Jan 2011
Location: Indianapolis, IN
Default

i thought the align bearings were junk. Have they got better?
__________________
Hello My Name Is Joe
Blade mCP X V1 BL - HP06V2 / Blade 130X - Lynx EOX / Blade 300x - AR7200BX, 2213-3585 / Blade 400 - DS760, 450MX / Trex 500ESP DFC - AR7200BX, 500MX / Trex 550e DFC - AR7200BX, 600MX / X525 Quad / DX8
jabu32 is offline        Reply With Quote
Old 08-29-2013, 07:27 AM   #29
Trexwilly
Registered Users
 
Posts: 4,168
 

Join Date: Feb 2010
Location: USA
Default

The Boca Orange seals cost me a 2221-8V2 and a 3026-1600... The align don't last forever, but I have yet to have one grenade a motor
__________________
Fly... crash... rebuild... repeat... Fly hard my friends!
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by Trexwilly; 08-29-2013 at 08:58 AM..
Trexwilly is online now        Reply With Quote
Old 08-29-2013, 08:46 AM   #30
jabu32
Registered Users
 
Posts: 2,179
 
My HF Map location
Join Date: Jan 2011
Location: Indianapolis, IN
Default

i always thought bocas were the best.
__________________
Hello My Name Is Joe
Blade mCP X V1 BL - HP06V2 / Blade 130X - Lynx EOX / Blade 300x - AR7200BX, 2213-3585 / Blade 400 - DS760, 450MX / Trex 500ESP DFC - AR7200BX, 500MX / Trex 550e DFC - AR7200BX, 600MX / X525 Quad / DX8
jabu32 is offline        Reply With Quote
Old 08-29-2013, 09:01 AM   #31
Trexwilly
Registered Users
 
Posts: 4,168
 

Join Date: Feb 2010
Location: USA
Default

Me too, Other guys swear by the Orange seals, so I tried them, the first failure I thought, must have been a dud, but after the second I swore off them...
__________________
Fly... crash... rebuild... repeat... Fly hard my friends!
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Trexwilly is online now        Reply With Quote
Old 08-29-2013, 09:55 AM   #32
ronm3313
Registered Users
 
Posts: 2,725
 
My HF Map location
Join Date: Jan 2010
Location: Antioch, CA
Default

Here's a You Tube video:
__________________
AMA: 943183, DX8, Tarot 500 ESP DFC/Vbar, Goblin 700/Brain
ronm3313 is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters


500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

Thread Tools
Display Modes

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

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com