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2.4G Spektrum Radios Spektrum 2.4 Gigahertz Radios and Technology |
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12-01-2007, 08:57 PM | #21 (permalink) |
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Bearings
When installing bearings on mating surfaces,
.5 is a million miles off, I've been lucky in the past with accuracies at .18 to .10 but never .50 or even .25. |
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12-01-2007, 09:14 PM | #22 (permalink) |
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Anyone know where you can buy these bearings (4x7x2mm) in Canada, perhaps online?
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12-01-2007, 11:49 PM | #23 (permalink) |
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Join Date: Mar 2007
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Does anyone know what the X9303 has in this regard? Same setup? All bearings?
John
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Logo 600 3D V-Bar, Jazz 55-10-32, Tango 45-7, 0.7/13T, BLS451/BLS251, JR R921, Maniac623 Logo 500 3D V-Bar, Jive 100+LV, Scorpion HK-4020-1100, 0.7/15T, S9452/S9256, AR7000, RT560 T-Rex 600 CF, Jazz 80-6-18, Neu 1515/2.5D/F/H, 11T, S9451, ds760/S9254, AR7000, Radix600 T-Rex 500 CF, stock ESC/motor/rotors, 13T, HS-5245MG, ds760/S9254, JR R921 |
12-02-2007, 12:42 AM | #24 (permalink) |
Thread Starter
Join Date: Jun 2007
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John,
Just open up the radio and look the gimbals. If one of the both end supporting bearings is silver, then it is full ball bearing. Other wise if it is bronze colored, it is a bronze bushing. I am pretty sure the X9303 and 12X should be quad bearing gimbals for each stick. Garf |
12-02-2007, 12:47 AM | #25 (permalink) | |
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Join Date: Mar 2007
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Quote:
I just don't yet have my X9303 - waiting for it to arrive. If, however, they had bushings, then when I ordered a couple for my DX7, I'd order a couple more for the X9303, and save a bit on postage. Given the prices at that site, it would possibly even be worthwhile to order 10, and help out a few other folks here get them more cheaply. $4 each for 10 vs. $7 each for singles is a big difference. John
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Logo 600 3D V-Bar, Jazz 55-10-32, Tango 45-7, 0.7/13T, BLS451/BLS251, JR R921, Maniac623 Logo 500 3D V-Bar, Jive 100+LV, Scorpion HK-4020-1100, 0.7/15T, S9452/S9256, AR7000, RT560 T-Rex 600 CF, Jazz 80-6-18, Neu 1515/2.5D/F/H, 11T, S9451, ds760/S9254, AR7000, Radix600 T-Rex 500 CF, stock ESC/motor/rotors, 13T, HS-5245MG, ds760/S9254, JR R921 |
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12-02-2007, 01:11 AM | #26 (permalink) |
Team Taco CEO
Join Date: Oct 2006
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Nope, the X9303 don't have bearings but also has a different construction so changing them out will be harder. I won't be changing them out anytime soon as it looks a lot more involve than the DX7. Also I don't think changing them out to bearings on the X9303 will make that much of a different. It use a better quality pot. than the DX7 but also use the pot. as one of the bearing joint. There's also a metal shaft that ride on the bronze bushing with grease. This will differently last a lot longer than the plastic on bronze bushing on the DX7.
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Kevin Don't Taco My Pack, Bro! , Why crash when you can POUND it! |
12-02-2007, 06:32 PM | #27 (permalink) |
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Join Date: Aug 2007
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Heys guys I found these bearing that are 4x7x2 but they are only $3 a piece instead of $7.
http://www.allerc.com/product_info.p...roducts_id=443 I'm thinking something as high quality as the ABEC bearings aren't really needed for this since they won't be under tons of stress. |
12-03-2007, 01:28 AM | #28 (permalink) |
Team Taco VP
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Nice idea and NICE mod!!!!
Thanks for sharing! Bob
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12-03-2007, 10:54 PM | #29 (permalink) |
Join Date: Apr 2007
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This is an interesting mod. However, I try so hard to detect any slop in my tx and couldn't find any. Honestly I don't know what I am missing. But I like the idea of bearings since they seem like a long term investment so to speak. I like my DX7 to be good as new for a long time.
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12-04-2007, 12:22 AM | #30 (permalink) |
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Cool mod!! Yea Baby!!
Thanks for sharing Garf!!
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William James Crazy wife still trying to kill me. |
12-04-2007, 06:47 AM | #31 (permalink) |
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Another great mod is replacing the voltage regulator in the DX6/DX7 with a more efficient one.
http://www.dimensionengineering.com/...ektrum_mod.htm Not to hard to do, and greatly improves run time of the TX. |
12-04-2007, 10:04 AM | #32 (permalink) |
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personally I found that just using a 3s lipo solves that problem, and one is much less likely to screw up the radio board this way... Plenty of posts of people screwing up the solder pads while de-soldering the original regulator.
I did that dim-eng mod to my dx6, but on the dx7 I just put in a 3s hyperion pack. It fits like a glove and lasts for weeks. -Fog
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This heli stuff is a pretty deep Rabbit hole, you just have to decide how deep you are willing to go... |
12-06-2007, 11:36 AM | #33 (permalink) |
HF Support
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Another source for the bearings
Hobby Lobby has part number RCRS1133 which is two 4x7x2 bearings for $4.10 (US). They are currently in stock. They do ship to Canada.
Currently it is the 3rd item down on the page the link takes you to. jrohland |
12-15-2007, 01:40 AM | #34 (permalink) |
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Join Date: Jun 2007
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Thanks Garf for this mod! I just did it, and it's pretty darn cool. I got the bearings here for 3 bucks a piece:
https://www.gravesrc.com/ProductDeta...e=GWSEPSC-24AC It was much more involved than it looks, lots to take apart to get to the bearings. On hind sight, I should have taken detail pics for you guys of each step, but I didn't quite know what I was doing, so took my time figuring it out as I went, and didn't think it was worth taking pics at the time.... and no, I am not gonna take it apart ever again Actually it's not as bad as it sounds, there are a lot of things to be careful of, like Garf said there are many wires, and I was afraid of not putting things back in the right order. It took me a bit longer to do this upgrade than garf, but not by a heck of a lot. And no, M4x7x2.5mm will not work, it has to be M4x7x2, just by looking at it there is no way 2.5 will fit in there. Anyway, at my level this mod won't make me any better. I keep hoping for a mod that is magically going to turn me into a sazbo or something, I'm still waiting for that mod. But I did notice that the sticks do move much smoother, and I had to tighten up the gimbals after the mod, it was just way too smooth and felt like it was slipping off my fingers. The throttle stick felt especially good and smooth I've only tested it on the sim so far, and will see how it goes out in the field tomorrow. Overall, it's a real pain to do, and takes a lot of nerves, careful thinking, and time. But in the end I am very happy to have done it to my dx7, maybe tomorrow I will fly like sazbo.... just maybe.... Thanks again Garf -Crabfu |
12-15-2007, 02:45 PM | #35 (permalink) |
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Join Date: Jun 2007
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ok tried it out on the field today, and had the best flights that I've ever had (which isn't saying much lol). Not sure how much of it was the dx7 bearing mod, since I did do a lot of tweaking with my trex.... but I just felt in total control.... felt so good that I attempted my first tic tocs, successfully!
Thanks again for sharing this Garf! -Crabfu |
12-28-2007, 12:04 AM | #36 (permalink) |
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So on the DX7 you need (4) of these ball bearings to do the upgrade, correct?
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01-04-2008, 11:14 AM | #39 (permalink) | |
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Join Date: May 2004
Location: Northern Vermont
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Quote:
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01-04-2008, 02:05 PM | #40 (permalink) |
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Join Date: May 2004
Location: Northern Vermont
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While waiting for GWS 4x7x2mm bearings, I've put in a very small amount of Triflow oil on the 4 bushings to see if it improves the feel, and it does a bit.
As I was not happy with the throttle gimbal movement smoothness , also took the spring plate on the throttle gimbal and used a small file to remove all the teeth off the plastic ratchet part. I then used 600 grit sandpaper to smooth the surface and dabbed a bit of grease on the surface before re-assembly. That throttle/pitch gimbal is now much smoother. |
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