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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › Replacement bearings for Century ?
08-03-2007 02:54 AM  13 years ago
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CX1

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Canada

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Replacement bearings for Century ?
Q1
Has anyone found or used tapered bearings as a replacement for the stock items?

Q2
Is there a heli on the market that uses tapered bearings ?

Q3
If no heli kit exist that uses tapered bearings, Why not?

I included a pic for reference of what I mean

" Team Protoast "
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08-03-2007 03:50 AM  13 years ago
Gearhead

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good question, but I think for 1 they would create more drag..

Jim
Jim
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08-03-2007 02:35 PM  13 years ago
HeliAdict

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Try and find tapered bearings that small..
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08-04-2007 04:53 PM  13 years ago
CX1

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Canada

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Thats the whole point of this topic
why aren't there any tapered bearings used in helicopters ?
Seems to me they would handle thrust loads better than todays bearings.
They use them in automotive applications with succes
" Team Protoast "
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08-04-2007 09:27 PM  13 years ago
Gearhead

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well I'm sure some bearing manufactures makes smaller tapered roller bearings,, but a tapered roller bearing really is not a thrust bearing, it is for side loads, that is why you don't see ball bearings in/on auto wheel axles,,

the radial ball bearings in your model's main blade grips probably don't take that much stress because their proportion to fullsize is much larger, so with that~ if these model manufactures used some super strong exotic metal and made a 2mm diameter spindle then you may see tapered roller bearings in your models main blade grips,, then again maybe not because the thrust bearing still take most of the load and the radial bearings just keeps everything straight and turning smooth,,

so the best place for a tapered bearing in a RC heli would be on the main shaft, so if you knew you were not going to crash for 8 or 10 years then maybe you would benefit from a tapered bearing on the main shaft, but since your going to crash in 3 weeks a cheaper ball bearing will do

Jim
Jim
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08-07-2007 11:11 PM  13 years ago
S Bell

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Nova Scotia Canada

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that is why you don't see ball bearings in/on auto wheel axles
Dude you see them all the time, just not on your car. Angular contact ball bearings carry massive thrust loads and can be found everywhere. These types are often directional. There is alot of educational information out there on wheel bearings.

http://www.p4bearings.com/servlet/t...CFQYjWAodZCv0zw
http://www.tpub.com/content/constru...s/14273_327.htm
http://www.timken.com/industries/su...ts/bearings.asp

The fractured race bearing is very interesting. I think MA was working on angular contact bearing installations for models?

Did you know that the Thunder Tiger 90SE has the largest upper mast bearing (12X28X8mm) of most any model helicopter in that size?

Stephen
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08-07-2007 11:53 PM  13 years ago
Furious Predator

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Kitchener, Ontario, Canada

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why aren't there any tapered bearings used in helicopters
because we use Thrust Bearings
Shawn
Team Leisure-Tech
Team HelixRC
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