Maintenance & Technical > KX500 Original

Bob weight toal for Balancing a crank

<< < (2/2)

Dutch-K5 Fan:
This PDF file is a what I found in englisch, whanna make a simple version so we all can understand it. :-)
Till now we can use this so you don't have to wait on me.

Dutchie

jonny500:
thats gold dust dutchie, many thanks

Dutch-K5 Fan:
Thank you. Give me till the end of next week to post a new topic with "al the secrets".
Want new topic for easy finding with minimun discusion to ceep it simple and clear. Because it's a difficult subject.
Post links in al topics ware crank balance is talked about.

Dutch

81cr450:
Awesome, Thanks Dutch, That seems too easy. I'm not quite sure why he's is splitting the weight on the pin end & the piston , must be RPM related . I thought I'd need the machine to do it but the static versus dynamic does make sense as the width of the crank is so narrow the dynamic doesnt really come in to play. I thought for sure youd use the whole weight of the combined piston pin rod bearings combo. All else fails I figured I could weigh a stock piston & rod & bearings to try to see what the factory did Thanks again.
Look forward to your simplification

RoostDaddy:
Where is everyone sending their cranks to get balanced?

Here's a little caption that I've found,
there are many different balance factors you can use, the most important part is how the cranks are balanced. To do it right it is very time consuming. The crank must be disassembled and put back together with nothing on it. Then after weighing the appropriate parts you create a formula using rotating mass and reciprocating mass to establish what?s called a bob weight. Keep in mind now that all these cranks are different .
After spinning in the balance machine, a specific amount of weight is added or removed at a specific rotation of degrees (different on each crank half). This completes the balance process and the crank must be disassembled and reassembled in the same manner.  Dead balls true!! Crank width perfect!!

Navigation

[0] Message Index

[*] Previous page