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Who knows? journal Collar?

Discussion in 'The Hokey Ass Message Board' started by Rustem, Jan 17, 2012.

  1. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    Friends! Who knows? ...? The size of the bearing crankshaft repair size 0.30 "It is necessary to know. Crankshaft ready for honing. It would be grateful to you all.:confused:
     

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  2. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,356

    Hnstray
    Member
    from Quincy, IL

    Not sure I understand your question. But, normally when grinding a crankshaft journal undersize the width of the journal is not affected. The width stays the same, only the diameter is changed.

    Hope this is what you are wanting to know.

    Regards,
    Ray
     
  3. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    I have great wear on the crankshaft in this, you need to grind. What should I do? There is a repair sizes? My size now, without sanding, 1.2511 "between.
    What makes the U.S. the crankshaft if it is necessary to polish stops (side)? Sorry for English.
     
  4. barney rubble
    Joined: Sep 3, 2008
    Posts: 340

    barney rubble
    Member

    I don't fully understand your question either but it woud help to know what kind of motor we are talking about also.
     
  5. barney rubble
    Joined: Sep 3, 2008
    Posts: 340

    barney rubble
    Member

    I see we are having a language problem here but we can get by. I am at work with bearing books I think you are wondering what oversizes are avaliable. I will try to help as long as I can.
     
    Last edited: Jan 17, 2012
  6. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    this size is
     

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  7. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    Crankshaft repaired in the workshop. Now the size main journal 0.30 ". A very bad state of side walls of the crankshaft in place where there is a thrust bearing. This place must be processed. I can buy a set of bearings 0.30 in the USA. What to do with the width of the thrust bearing? There is a repair sizes? What?

    My engine is 235 year 1962
     
    Last edited: Jan 17, 2012
  8. ffr1222k
    Joined: Nov 5, 2009
    Posts: 1,470

    ffr1222k
    ALLIANCE MEMBER

    I may be wrong, but it looks like you are showing a main bearing with the thrust surface. The crankshaft you show dimensions on you indicate a rod bearing.

    I have never heard of the thrust surface being oversized. If that is you concern you should be OK.
     
  9. ffr1222k
    Joined: Nov 5, 2009
    Posts: 1,470

    ffr1222k
    ALLIANCE MEMBER

    Sorry, you posted while I was typing and answered my question.
     
  10. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    This is a main bearing, it serves to reduce, the axial displacement. Axial displacement of crankshaft. What would the crankshaft does not move. Very difficult to translate technical language.
     
  11. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    I need to know the size, width! And there is a dependence on the size of the repair?
     
  12. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    I'm talking about the details
     

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  13. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    I can not in Russia go to the store and try on size. Russia do not sell these cars and part. :)
     
  14. Ruiner
    Joined: May 17, 2004
    Posts: 4,141

    Ruiner
    Member

    Ok, so you're saying that you already had the main bearing journals turned down .030", but the side surfaces are in bad shape and you need to clean the side or thrust surfaces up?...and you need to know what width the .030" main bearing replacements are so you can fix your crank?...Ikm pretty sure the thrust surfaces on undersize main bearings remain the same width, and hopefully someone can give you the stock width to check against the measurement you have...
     
  15. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    yes correct. Since then, 0.10, 0.20, 0.30, 0.40, width does not change? And if the old worn out bearing the lateral surface of what to do?
     
  16. Ruiner
    Joined: May 17, 2004
    Posts: 4,141

    Ruiner
    Member

    By the way, just a shot in the dark here, but I'd say your 1.2511 is the stock size, since 1.25 is a nominal dimension here in the US, and the .0011 thousandths of wear is pretty minimal and if the thrust surfaces are clean I wouldn't worry about running it...
     
  17. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    1.2511 is dirty, very bad surface. It should be handled.
     
  18. Ruiner
    Joined: May 17, 2004
    Posts: 4,141

    Ruiner
    Member

    I see, well if there is someone at the repair shop that does crank welding that is one option, but perhaps we should wait for someone to see if the undersize replacement bearings are wider than stock...typically we order the bearings first and have the machining done to fit the new bearings...
     
  19. mjlangley
    Joined: Dec 11, 2008
    Posts: 196

    mjlangley
    Member
    from SE MI

    I think that you are saying that the thrust surface of the crankshaft is badly worn, and needs to be cut to smooth it, correct?

    If so, replacement bearings would not typically be wider, they would only have a smaller ID, to match a crankshaft ground undersize to repair the surface of it's journals.

    If your crankshaft's thrust surface needs to be cleaned up, it looks like the end play spec. for your 235 is 0.003" - 0.009", taken from this:

    http://www.secondchancegarage.com/public/632.cfm

    So if your crankshaft thrust surface does not clean up at a 0.009" cut, I would say that it needs to be welded and re-ground, or that you need to find another crankshaft....
     
  20. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,240

    Mr48chev
    ALLIANCE MEMBER

    I think you hit right on it MJ. I don't know of any bearing supplier who sells a bearing with a thicker thrust surface.

    Rustem is there a shop there that can weld up the surface and machine it back to specifications? Possibly a machine shop that works on truck engines as that is a common problem on them.
    Usually those are only worn on one side as operating the clutch pushes the crankshaft forward.

    The other option would be to buy a good crankshaft but the cost of purchase, shipping and fees might be a lot more than the cost of the repair.
     
  21. Rustem
    Joined: Dec 18, 2009
    Posts: 316

    Rustem
    Member

    Thank you friends. If the worst happens and I have to buy a crankshaft, tell me where I can do it in the U.S.? Who sells crankshafts for 235?
     

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