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Old 07-27-2010, 12:39 AM   #1
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Default thrust bearing

what causes them to blow?

i blew a thrust bearing in my capricorn clutch within a heat.. installed a kyosho to keep me going and blew that aswell?

i took the clutch apart and the balls just went all over the place..

is it; too much end play, not enough end play, too tight?

im gunna buy a new one.. but everyone i looked like 10$ea (plus delivery to aust).. so i want to make sure i dont want to blow another one.

the kyosho thrust bearing does look better than the capricorn thrust bearing though.. anyone know if they are the same size?
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Old 07-27-2010, 01:24 AM   #2
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did you grease it?
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Old 07-27-2010, 02:06 AM   #3
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Quote:
Originally Posted by LiL_JaSoN View Post
what causes them to blow?

i blew a thrust bearing in my capricorn clutch within a heat.. installed a kyosho to keep me going and blew that aswell?

i took the clutch apart and the balls just went all over the place..

is it; too much end play, not enough end play, too tight?

im gunna buy a new one.. but everyone i looked like 10$ea (plus delivery to aust).. so i want to make sure i dont want to blow another one.

the kyosho thrust bearing does look better than the capricorn thrust bearing though.. anyone know if they are the same size?
Too much end play will slam the thrust bearing when the clutch engages. The two washers usually have different inner diameters for front and rear and as previously mentioned, they require regular greasing. I also face the bearing with the open end towards the clutch shoe.
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Old 07-27-2010, 02:39 AM   #4
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Quote:
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Too much end play will slam the thrust bearing when the clutch engages. The two washers usually have different inner diameters for front and rear and as previously mentioned, they require regular greasing. I also face the bearing with the open end towards the clutch shoe.
yes too much end play can cause these problems. End play must be as minimum as 0.10 to 0.20 max. Just to feel there is a gap. Also, having
a clutch gap set to > 0.8-0.9 (too aggressive clutch) can cause these problems. The clutch shoe hits with great force the clutch bell and the
thrust bearing i guess can fail. just my thoughts.
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Old 07-27-2010, 04:14 AM   #5
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defently not the end play. it was ~0.1mm there.

clutch gap was 0.4mm

the inner grooved was face into the bearing (pretty sure the front and rear was correct.. unless i accidently put front on rear, rear on front).. but i dont think that can make a bearing blow within 2 laps..

only possibility is the greasing of the bearing..

pretty much had it all sorted... took it for a spin and noticed it was just slipping.. took it back in the clutchbell must of been 193346098degrees so i let it cooled down and noticed there was abit of play in it. so i took the clutchbell off and balls just went everywhere!.

i dont want to spend another $10 on a thrustbearing.. + 10$ delivery. i already blew 2 in 2 runs.. ill order another 2 kyosho thrust bearing for the capricorn clutch.
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Old 07-27-2010, 04:45 AM   #6
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Quote:
Originally Posted by LiL_JaSoN View Post
defently not the end play. it was ~0.1mm there.

clutch gap was 0.4mm

the inner grooved was face into the bearing (pretty sure the front and rear was correct.. unless i accidently put front on rear, rear on front).. but i dont think that can make a bearing blow within 2 laps..

only possibility is the greasing of the bearing..

pretty much had it all sorted... took it for a spin and noticed it was just slipping.. took it back in the clutchbell must of been 193346098degrees so i let it cooled down and noticed there was abit of play in it. so i took the clutchbell off and balls just went everywhere!.

i dont want to spend another $10 on a thrustbearing.. + 10$ delivery. i already blew 2 in 2 runs.. ill order another 2 kyosho thrust bearing for the capricorn clutch.
.1 might be a little tight, consider the amount of heat and expansion generated.
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Old 07-27-2010, 06:42 AM   #7
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Try this, it works for me!!

http://www.rctech.net/forum/5794230-post883.html
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Old 07-27-2010, 06:56 AM   #8
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Keep them well greased and they last forever, run them dry and fall apart in no time.

I use high temp wheel bearing grease from the auto parts store and haven't had one fail on me in six years.
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Old 07-27-2010, 07:15 AM   #9
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ok, i just noticed the kyosho thrust bearing is 4..8x10.. while serpent, team magic, xray etc are 5x10...

not sure of the capricorn size?

but i used it with the capricorn thrust plates.. thats maybe why.
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Old 07-27-2010, 10:16 AM   #10
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Quote:
Originally Posted by azcau View Post
Yes, very cheap and no chance of errors.

Quote:
Originally Posted by LiL_JaSoN View Post
ok, i just noticed the kyosho thrust bearing is 4..8x10.. while serpent, team magic, xray etc are 5x10...

not sure of the capricorn size?

but i used it with the capricorn thrust plates.. thats maybe why.
Ofcourse you can not mix different brands and sizes parts. The distance and size of the groove can differ between all.
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Old 07-27-2010, 11:06 AM   #11
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Quote:
Originally Posted by blis View Post
.1 might be a little tight, consider the amount of heat and expansion generated.
agreed.

those little bearings will just disintegrate if there is any amount of preload on them.

Also, make sure that you clean the bearing, ball races and clutch housing well to get rid of any old grease and foreign particles that accumulates there. one little piece of debris going thru the races will destroy a bearing fast.


Roelof,

Very interesting mod, with the brass ring! I want to try it out.
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Old 07-27-2010, 11:29 AM   #12
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I've been driving serpents since 08 and have never blown a trust bearing, never.
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Old 07-27-2010, 11:50 AM   #13
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Roelof,

Very interesting mod, with the brass ring! I want to try it out.
I am still waiting for ceramic rings.... something else my sponsor mentioned are DLC coated rings between the 2 steel discs, just to lower the friction running almost as smooth as a bearing.
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Old 07-27-2010, 04:15 PM   #14
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Default TM Thrust bearings

Quote:
Originally Posted by LiL_JaSoN View Post
ok, i just noticed the kyosho thrust bearing is 4..8x10.. while serpent, team magic, xray etc are 5x10...

not sure of the capricorn size?

but i used it with the capricorn thrust plates.. thats maybe why.
Without it sounding like a plug for TM, I use the TM Thrust bearings and find them extremely durable. They cost a little more, but hey it's a little part that plays a huge role.
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Old 07-27-2010, 05:43 PM   #15
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here try these, they are cheap and I havent had any problem with them http://www.avidrc.com/shop/index.php?l=search_list&s[title]=Y&s[short_desc]=Y&s[full_desc]=N&s[sku]=Y&s[match]=all&s[search]=thrust+bearing
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