Fun, Learning, Friendship and Mutual Respect START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 250 Class Electric Helicopters


250 Class Electric Helicopters 250 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


Reply
 
LinkBack Thread Tools Display Modes
Old 03-15-2009, 07:13 PM   #1 (permalink)
Registered Users
 
My HF Map location
Join Date: Jun 2006
Default Mixing arm bearings

I was checking over the 250 this evening and I noticed the upper mixing arms were pretty hard to move. I took one side off, put it back and it was 100% better. I tried the other side and the inner bearing was already in pieces. The outer ring is still stuck in the arm. This is about 30 flights no crashes. Can I buy the bearings or do I have to buy the arms as a set? Has anyone else had this problem.
ckoelliker is offline        Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-15-2009, 07:42 PM   #2 (permalink)
Registered Users
 

Join Date: Mar 2008
Default

Just changed my mixing arm bearings,align 681X ,4 to a pack.Mine had so much slop I couldnt track the blades anymore.I had the bearings from 2 original tail grips (same bearing).You need 4 bearings total for the 2 mixing arms.I think there like 5 bucks.The mixing arms are like 12 bucks,dont know if they include the bearings with the arms?
gixxerjeff is offline        Reply With Quote Quick reply to this message
Old 03-15-2009, 08:06 PM   #3 (permalink)
Registered Users
Thread Starter Thread Starter
 
My HF Map location
Join Date: Jun 2006
Default

Thanks, I will look into it. How many flights before you switched them out?
ckoelliker is offline        Reply With Quote Quick reply to this message
Old 03-15-2009, 08:17 PM   #4 (permalink)
Registered Users
 
Posts: 3,679
 
My HF Map location
Join Date: Jul 2008
Default

I'm with you on slop in the bearings (as everyone else is too)...can't get the blades to track right on. still having fun though.
__________________
Former owner of T-Rex: 250, 450 V2, 500ESP V-Bar, 550 DFC 3GX, 600ESP V-Bar, 700E 3G
Shef is offline        Reply With Quote Quick reply to this message
Old 03-15-2009, 08:36 PM   #5 (permalink)
Registered Users
 
Posts: 8,891
 
My HF Map location
Join Date: Feb 2008
Default

I just rebuilt mine with the Gaui bearings, it has helped with the slop, I am on my third set of bearings, 100 flights a set...
__________________
No Plankers were injured in the making of this post!
TOY BOX contents Mcp x, 450 Pro VBar, 500 VBar, 12S 600CF VBar... Mikado Logo 6003D VBar Proudly flying KBDD, MKS, Castle, Scorpion and some planks too
snjbird is offline        Reply With Quote Quick reply to this message
Old 03-15-2009, 09:00 PM   #6 (permalink)
Registered Users
 
Posts: 3,679
 
My HF Map location
Join Date: Jul 2008
Default

SNJ - do you have a link to the Gaui bearings you used? It really peeves me to see the wobble in the mixing arms. Did you replace the bearings for both upper and lower mixing arms?
__________________
Former owner of T-Rex: 250, 450 V2, 500ESP V-Bar, 550 DFC 3GX, 600ESP V-Bar, 700E 3G
Shef is offline        Reply With Quote Quick reply to this message
Old 03-15-2009, 11:25 PM   #7 (permalink)
Registered Users
 
Posts: 838
 

Join Date: Jun 2008
Default

My mixer arm bearings only last 25 flights before getting loose. I might buy some boca ceramics.
cbrian4 is online now        Reply With Quote Quick reply to this message
Old 03-15-2009, 11:39 PM   #8 (permalink)
Registered Users
 
Posts: 1,610
 
My HF Map location
Join Date: Sep 2007
Default

sanding down the washer that sits between the 2 bearings will help. this puts a pre-load on the bearings, and tightens the whole assembly.

the washer doesn't require alot of sanding. it only takes about 5 minutes. you can tell by putting it back together and feeling the slop. once you get the slop out, the bearings last alot longer

just don't sand them down to the point that it puts the bearings in a bind

to put this into perspective, we're talking about 1/1000... maybe 1.5/1000. I used an emery board....
__________________
If, at first, you don't succeed, then skydiving is probably a bad idea for you.
george0079 is offline        Reply With Quote Quick reply to this message
Old 03-16-2009, 02:47 AM   #9 (permalink)
Registered Users
 
Posts: 838
 

Join Date: Jun 2008
Default

I already did the sanding washers but the bearings still loosened up, they're just cheap, crappy bearings.
cbrian4 is online now        Reply With Quote Quick reply to this message
Old 03-16-2009, 08:44 AM   #10 (permalink)
Registered Users
 
Posts: 8,891
 
My HF Map location
Join Date: Feb 2008
Default

Ready heli had the ones I used... they only had 2 sets and I have not been fast enough to get more every time they are back in stock, I miss them... I just did the uppers the lowers do not have nearly as much play! I'll look and see if I can get the number for ya Shef.
__________________
No Plankers were injured in the making of this post!
TOY BOX contents Mcp x, 450 Pro VBar, 500 VBar, 12S 600CF VBar... Mikado Logo 6003D VBar Proudly flying KBDD, MKS, Castle, Scorpion and some planks too
snjbird is offline        Reply With Quote Quick reply to this message
Old 03-16-2009, 11:53 AM   #11 (permalink)
Registered Users
 

Join Date: Mar 2008
Default

Quote:
Originally Posted by snjbird View Post
Ready heli had the ones I used... they only had 2 sets and I have not been fast enough to get more every time they are back in stock, I miss them... I just did the uppers the lowers do not have nearly as much play! I'll look and see if I can get the number for ya Shef.
yeah,I think the upper mixing arms get the workout stress from pitching the main blades.The lower (washout) arms kinda take care of the flybar and cage = less torque,so the bearings last longer.
gixxerjeff is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 12:04 PM   #12 (permalink)
Registered Users
 

Join Date: Feb 2008
Default

I notice that when I grab the longer pitch links (not the short ones that go to the blade grips) and pull, the upper mixing arm moves back and forth. is this what you guys are talking about? I dont have any problem with them being hard to move tho..
specialk is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 02:33 PM   #13 (permalink)
Registered Users
 

Join Date: Mar 2008
Default

Quote:
Originally Posted by specialk View Post
I notice that when I grab the longer pitch links (not the short ones that go to the blade grips) and pull, the upper mixing arm moves back and forth. is this what you guys are talking about? I dont have any problem with them being hard to move tho..
The mixing arms should just pivot on there screws,like a seesaw,I had an actual wobble like the screw was coming out,but it wasnt.It was the bearing being worn out.
gixxerjeff is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 02:53 PM   #14 (permalink)
Registered Users
 
Posts: 3,679
 
My HF Map location
Join Date: Jul 2008
Default

all my mixing arms wobble like crazy...hopefully the Gaui bearings will arrive at my doorstep tomorrow
__________________
Former owner of T-Rex: 250, 450 V2, 500ESP V-Bar, 550 DFC 3GX, 600ESP V-Bar, 700E 3G
Shef is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 04:16 PM   #15 (permalink)
Registered Users
 

Join Date: Feb 2008
Default

can someone please post gaui bearing part numbers?
specialk is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 04:21 PM   #16 (permalink)
Registered Users
 
Posts: 3,679
 
My HF Map location
Join Date: Jul 2008
Default

I hope it's these b/c I ordered 4 sets of them:
http://www.readyheli.com/203250_Bear...0_p/203250.htm
__________________
Former owner of T-Rex: 250, 450 V2, 500ESP V-Bar, 550 DFC 3GX, 600ESP V-Bar, 700E 3G
Shef is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 05:33 PM   #17 (permalink)
Registered Users
 
Posts: 904
 
My HF Map location
Join Date: Jan 2009
Default

they are out of stock
__________________
T-rex 250 Super Combo w/ hs-65mg's
Blade cp pro: spectrum receiver, BL main, DD tail, Gyro
www.bladecpupgrades.co.nr
Blade cx2
E-flite 4-site
helidude3 is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 06:22 PM   #18 (permalink)
Registered Users
 

Join Date: Mar 2008
Default

Quote:
Originally Posted by Shef View Post
I hope it's these b/c I ordered 4 sets of them:
http://www.readyheli.com/203250_Bear...0_p/203250.htm
Damm,they dont even give you the actual size?the OEM align bearing is 1.5 x4 x1.2 mm.
gixxerjeff is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 06:27 PM   #19 (permalink)
Registered Users
 
Posts: 230
 
My HF Map location
Join Date: Dec 2006
Default

Terrible bearings for these arms....

I ask Eyal from ReadyHeli to deliver BOCA's (non ceramic). He could deliver them for 16dollars 4pieces.
(thats what he told me....):

quote:
======================================
you will pay $15.99 for (4) bearings?

if so i can order you as many as you want.

Thank you for allowing us to serve your heli needs.
======================================

Afterwards I ask to put them on their site....no reaction till now.

Z
__________________
| mCPX [email protected] | [email protected] | [email protected] || FunJet [email protected] | SwiffieII || FF10 || 720i DUO3 | ALC8500
Z900 is offline        Reply With Quote Quick reply to this message
Old 03-17-2009, 06:45 PM   #20 (permalink)
Registered Users
Thread Starter Thread Starter
 
My HF Map location
Join Date: Jun 2006
Default

helidirect has them in stock.
ckoelliker is offline        Reply With Quote Quick reply to this message
Reply




Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Location
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On




Copyright © Website Acquisitions Inc. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

SEO by vBSEO 3.6.1