Engine help - Which way does the bearing go? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 10-08-2004, 07:22 PM   #1
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Engine help - Which way does the bearing go?

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I've received my bearings now I'm going to install them in my YS .45.

I know which way the front one goes in, but I'm not sure about the rear one.

The rear bearing is not symetrical, one side has exposed 'balls' (so to speak) and the other side has a composite-looking shield in front of it.

Which side faces front?

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Old 10-08-2004, 07:49 PM   #2
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I would have to say that the shield would face the front of the engine so that the fuel/oil mixture can get to the bearing in through the back.
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Old 10-08-2004, 09:11 PM   #3
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In my experiance the rear bearings do not have seals. Did you get this from YS or a dealer. If it was mine I would pick the seals out of the rear bearing. With the front bearing I would remove the rear side only and flush the grease out and oil it. Most brgs. that are sealed have grease in them. You want to oil lube them for high speed. On some engines the frt. brg. has both seals also removed which is where you get the so called leak at the prop driver. This to me only confirms that oil is going through and doing its job.
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Old 10-08-2004, 10:22 PM   #4
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I'm sorry, I didn't explain it very well

These are not sealed bearings.

They are the proper bearings, purchased from Boca bearing specifically for the YS .45.

The rear bearing does not have a seal on it, its just not symmetrical and on one side the balls are exposed and on the other they are somewhat, but not completely, covered. I want to situate them in so they get the proper lubrication, but I don't want to guess, because they are VERY difficult to get on and off. Especially for someone who is not an engine guru.

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Old 10-09-2004, 10:49 AM   #5
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it should not matter, if the cage is assymetrical (sounds like thats the case) it wont matter which way it goes.
Andrew Coholic -MAAC #26287L

1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's...
if its got a wing or two and an engine - I like it!
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