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Old 01-30-2005, 02:53 PM   #46
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Quote:
Originally posted by Hyper1
I'd say go with the boca's
thanx hyper1 i'll take alook at boca web site.
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Old 01-30-2005, 03:19 PM   #47
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Which ones are the good choice:

-Rubber sealed ones
-Stain seal ones

Bye!!!
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Old 01-30-2005, 05:59 PM   #48
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Hugo-Depends what you're using them for. For offroad or on dusty/dirty parking lots, your best bet will be to use rubber shielded bearings. They hold a better seal and will keep the dirt and grime out much better than their stainless steel counterparts. On carpet or on clean surfaces, I'd go with a metal shielded bearing.
If you're the lazy type(like me) I'd recommend using rubber shielded bearings. They require very little maitenence.
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Old 01-30-2005, 09:57 PM   #49
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Default rc4less bearings

they claim that they use abec #7 ceramic bearing, anybody use these bearings????????
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Old 01-30-2005, 10:15 PM   #50
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I cracked one of my 'Acer ceramic bearings' today ...

- JB
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Old 01-30-2005, 10:19 PM   #51
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Quote:
Originally posted by JayBee
I cracked one of my 'Acer ceramic bearings' today ...

- JB
how in the hell did you do that????
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Old 01-30-2005, 10:42 PM   #52
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Quote:
Originally posted by dawgmeat
how in the hell did you do that????
If I could answer that question... you fill in the rest
But I'm pissed ...

- JB
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Old 01-31-2005, 03:02 AM   #53
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Quote:
Originally posted by JayBee
If I could answer that question... you fill in the rest
But I'm pissed ...

- JB
Hey, a friend of mine cracked a ceramic bearing about two years ago.
I don't know which brand it was though.

I was just about to order a set, probably from acer but if this is common I won't be happy.

Has anybody else had this problem?
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Old 01-31-2005, 04:39 AM   #54
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Default Re: rc4less bearings

Quote:
Originally posted by dawgmeat
they claim that they use abec #7 ceramic bearing, anybody use these bearings????????
I've had rc4less bearings in my 12th scale Hyperdrive car for over a year and they are still smooth as glass. Had them in my EVO3SE as well and never had a problem.

Pookykat and JB- cracking a ceramic bearing isn't impossible. It's almost always the outboard hub bearing and it's from multiple hard hits. The outbaord hub bearing takess all the impact when you hit a pipe or board. It wasn't the bearing's fault...
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Old 01-31-2005, 05:56 AM   #55
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YES RC4LESS bearings are the real deal,I've been running them for almost two years now.
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Old 01-31-2005, 06:42 AM   #56
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Yea but for the same price you get Rating of #5 instead of #7....from Acer.
I just bought a set this morning. I had them in my TC3 before I got my Yokomo, super high quality and as long as you took care of them they will last a very long time.
Just my $0.02
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Old 01-31-2005, 06:57 AM   #57
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Well, I believe if money is not a problem, then you guys should try squat precision Gold bearing. They are proven to be better then ceramic bearings. And one thing I dun like ceramic bearings is they will crack especially in Gas Cars.
And I think there is a general misconception, some racers may thing that the higher the Abec rating, the better are the bearings.
But in actual fact, for high speed application like RC cars, Abec 5 is better as you need the gap for lubrication to flow.
Abec 7 bearing should only be used in applications where vibration is an issue.


Just my 2 cents......
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Old 01-31-2005, 08:45 AM   #58
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Nipple, your kinda right, right about the issues but not exactly right about the reasons- typically, the higher the ABEC rating, the more balls the bearing has which means the smaller they are. This is to disperse the load and make the bearing even smoother. Unfortunately, for our application there are varying loads and some times the hard hits damage the smaller balls easier than the larger ones.

As I stated earlier, the out hub bearings almost ALWAYS accept the majority of the crash load and fail. If you can't help hitting the pipes or afford replacing them when you do, then simply install good clean steel bearings in the outer hubs leaving the ceramics throughout the car. That way you have 4 extra ceramics (if you buy a kit) for future usa and it's very cheap to replace the steel ones when you smack a pipe.

I'll even do you a favor and tell you a little secret the pro nitro guys do for that exact reason. Purchase low cost bearings from somewhere like Avid bearings (I know David Joor- he's a cool guy), take the shields off, clean the oil and grease out, squirt or pack Brasso or some other very fine polishing compound in the bearing and then use you dremel with a polishing wheel or something non-abrasive to drive the inner race and spin it (not too fast) for a few minutes. Clean it out and oil it with a good bearing oil (I prefer something a little heavier than normal Trinity purple for nitro apps) and reinstall the shields. It's cheap, smooth as a ceramic and easy to replace. The reason I don't suggest doing the whole car is that the polished bearings have a decreased usable life so just ante up and buy the ceramics for the rest of the car.
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Old 01-31-2005, 10:15 AM   #59
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There are different grading systems for different items.

Precision balls (diff balls and balls that go into bearings) are measured using the ABMA (american bearing manufacturers association, formerly the AFBMA - anti friction bearing manuf. association) grading in which the lower the number, the tighter the tolerances.

Grade 3,5,10,15,25...
Most kits come with grade 25. if you can get grade 3 thats great but its gonna be a pretty penny. - and make sure its plenty hard!

Ball bearings (the construction of the actual bearing) are measured by ABEC (Annular Bearing Engineers Committee) where the higher the number the tighter the tolerances.
Grade 1-3-5-7-9. ... higher number items are for precise non-shock applications. stay with 3 or 5.

Hybrid ceramic bearings are metal casings with ceramic balls.
Full ceramics are all ceramic components.. lighter yes but can you not hit anything? :P
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Old 01-31-2005, 12:33 PM   #60
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ABEC definition

Quote:
Originally posted by Mr. Shookie
Yea but for the same price you get Rating of #5 instead of #7....from Acer.
Abec 7 for Acer ? i read the abec website and didnt found this info.
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