logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda

[Solved] WSK 125 - Tips & Techniques for Mounting Bearings on Shaft: Cold-Warm Method & Tools Used

smootny 12057 15
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
| New topic
  • #1 17060756
    smootny

    Level 18  
    Hello.
    When mounting bearings in the WSK engine I use a cold-warm patent.
    1st stage both crankcase warm and bearings cold (both halves),
    2. in the second stage, the cold shaft and the bearing in the crankcase are heated.
    Every time everything goes smoothly. However, I always have a zagwozdko with subsequent bearings on the shaft.
    How to mount them .. Cold - hammer in with some extra spindle so that it grasps both raceways of the bearing and does not damage anything in it. ???
    It is a pity, however, then plugs and cranksets .. 100% will get a smoke.

    I am asking for your opinion (maybe some videos) - how do you mount "second" bearings on the shaft in this engine.

    Greetings.
  • ADVERTISEMENT
  • #2 17060800
    jack63
    Level 43  
    Look for ETZ or Simson service in the network.
    This is all well described. You just need to modify the method to WSK
    Generally, "put everything in one half of the crankcase, and then put the heated other half on top. Then the screws and tapping with a wooden hammer to form.
    You could write a lot. You just have to ... think.
  • #3 17060824
    mladenick
    Level 16  
    I do not know exactly how to mount bearings in this WSCe, if it is self-lubricating it will be hard with the temperature, you can not go crazy better, if it is oil lubricated, you heat it to about 110 ° C, if you do not want to heat, you can drive it, to hammering you use e.g. a copper or brass hammer (so that it is e.g. 30 mm thick and flat from below) and you can hit with a hammer, aluminum is not recommended, it will be too soft.
  • ADVERTISEMENT
  • #6 17063372
    E8600
    Level 41  
    People used to nobody play in the cold / heat just the press. The method with thermal expansion must be used but for large elements, e.g. bearing 20 cm in diameter, otherwise it would not have come in.
    If I understood in some high-speed engine, but the WSKi engine has such vibrations that the screws themselves are unscrewing. Form overgrowth and additionally if you heat up too much aluminum with a gas burner, it will become plasticized (the crystal mesh will change). Heating aluminum above 500 degrees removes dispersion curing; it is very easy to achieve so much with the burner despite the rapid heat dissipation through the aluminum.
  • ADVERTISEMENT
  • #7 17063524
    jack63
    Level 43  
    What quirks are you writing?
    What burner? What press
    And very large bearings are cold assembled with loose and anaerobic adhesive.
    In the factory and decent service, the engines are assembled "warm", because this allows the bearing mounting stress to be released.
    Heating plates and special discs for the inner rings of bearings are used for heating. At home, all you need is an electric cooker and a wedged finger as a temperature meter.
    No burners !!!
    Folding as above is no overgrowth, only normal operation. In the cold, you can only break the engine. And screwing / screwing cold is the pinnacle of Januszowski.
  • ADVERTISEMENT
  • #8 17063545
    wojtek1234321
    Level 36  
    E8600 wrote:
    Heating aluminum above 500 degrees removes dispersion curing; it is very easy to achieve so much with the burner despite the rapid heat dissipation through the aluminum.

    You don't need to heat that much, just heat up 120 - 150 degrees with a heat gun, or crankcase to a preheated oven and it's enough. Such temperatures (or even higher) the engine reaches during operation and nothing happens with aluminum. For this mounted bearings for the freezer for an hour ... and what a pleasure to assemble, the hammer does not need to be used. Known from own practice, repairs of combustion saws, also WSK, Komar, Romet engines. These hammers were used when there was no such tools available (e.g. so-called "electric" heat guns). Now that there is a possibility, why not use it is easier and safer for repaired components, of course, everything with thoughtful sense and in accordance with "art".
  • #9 17063577
    jack63
    Level 43  
    Bearings max 120 oC. Karter up to 160 and nothing bad happens. Just check the temp as you used to control your iron, after a hissing sound applied to a split second of a wedged finger. With a certain dose of accuracy + - 5 oC
  • #10 17063683
    E8600
    Level 41  
    jack63 wrote:
    What quirks are you writing?
    What burner? What press

    I'm writing a burner because I've already seen those who heard something about heating (9 minutes of the film).



    There are many more similar films with a burner (people think that they do better than others because they heat and they actually do worse than if someone skillfully hammers it without heating).

    Large bearings are cooled with liquid nitrogen (due to size and fit tolerance).
    Unfortunately, in large factories it heats only where it is necessary (e.g. shaft bearings) and the rest goes to the press.

    Here a movie for the author if he wants to do better than others.





    jack63 wrote:
    Karter up to 160 and nothing bad happens.

    At this temperature I would be careful with Chinese "shit" engines.
  • #11 17063749
    jack63
    Level 43  
    E8600 wrote:
    At this temperature I would be careful with Chinese "shit" engines.

    And they will melt like soldering .... ???
    In addition, cranksets are not oversaturated, such as rims.
    Most do not speak English, and at the beginning of the film was:
    ... All parts should be ABSOLUTELY CLEAN ...
    What most ... forget about.
  • #12 17063848
    andrzej20001
    Level 43  
    You put it in the oven and the finito ..
  • #13 17063878
    jack63
    Level 43  
    andrzej20001 wrote:
    You put it in the oven and the finito ..

    An oven, or a quarrel with you: what's that stinking here?
    Why risk it for about PLN 50 you can buy an electric stove and use it in the workshop and not in the kitchen.
  • #14 17063903
    andrzej20001
    Level 43  
    jack63 wrote:
    what stinks here?
    ?? eeeeee, the eggs popped out of the pot :) ?
  • #15 17063929
    jack63
    Level 43  
    Were the eggs part of the engine?
    In addition, the heating device must be close to the table on which the motor is being assembled. Especially cranksets cool down very quickly and then sneeze from correct assembly ...
    Therefore, you need to heat them a little higher and ... pegs into the teeth tempo 22 ...
| New topic
Report a violation of the law

Topic summary

The discussion focuses on techniques for mounting bearings in the WSK engine using a cold-warm method. Users share their experiences and methods, emphasizing the importance of heating the crankcase and cooling the bearings for proper assembly. Various tools and techniques are suggested, including the use of a copper or brass hammer for driving bearings, and the recommendation to avoid excessive heating that could damage aluminum components. Some participants advocate for using a heat gun or oven for controlled heating, while others caution against using gas burners due to the risk of overheating. The conversation also touches on the use of adhesives for larger bearings and the necessity of cleanliness during assembly.
Summary generated by the language model.
ADVERTISEMENT