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2-stroke engine bearings

  1. Sep 29, 2010 #1
    I was taking apart a 2-stroke engine for a model aircraft and I'm a little confused about the types of bearings used for the connecting rod and crankshaft. So far, I know of the journal, needle, tapered roller, ball, and angular contact ball bearings.
    Does the connecting rod use a journal bearing or a needle bearing, or a combination? Same with the crankshaft. Which does it utilize?

    Any help is appreciated.
  2. jcsd
  3. Sep 30, 2010 #2
    Most small model airplane engines use a plain bearing for both positions. Easiest way to tell what was used is to look.
  4. Sep 30, 2010 #3


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    That vast array of listed bearings is messing me up. I'm used to 4-stroke engines, where everything is crush-fit bushings. (With the exception of specialty items such as roller rockers, which have needle bearings.)
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