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| Crankshaft balancing | |||
| Post Reply | Engineering Forum | ||
| Posted by: proace ® 07/18/2004, 23:29:50 Author Profile eMail author Edit |
When balancing a crankshaft would I be counterweighting for the crank pin and its distance from center or weight of the crank pin plus connecting rod, wrist pin and piston? Thanks |
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| : Crankshaft balancing -- proace | Post Reply | Top of thread | Engineering Forum |
Posted by: cylinderjockey ®  07/27/2004, 10:24:47 Author Profile eMail author Edit |
You want to counter the piston, rod and pin. On TDC your weights should be down. Hope this helps |
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| : Re: Crankshaft balancing -- cylinderjockey | Post Reply | Top of thread | Engineering Forum |
| Posted by: proace ® 08/09/2004, 22:14:58 Author Profile eMail author Edit |
So to say that if my piston, rod, pin were to weigh ??oz's then the counter weight would weigh the same amount? I wonder this because the counter weight is closer to the center of rotation than the piston and pin.
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| : Re: Crankshaft balancing -- proace | Post Reply | Top of thread | Engineering Forum |
| Posted by: manulal ® 01/17/2005, 01:25:42 Author Profile eMail author Edit |
Not exactly. We are not balancing the weight, but the force. The unbalanced force created by the pin, con rod and piston has to be calculated and it should be balanced by counter weights. The formula being F = M*R*W*W. W = rpm, R = Distance of the centre of mass of the counter weight from the crak shaft centre line. M = mass of counter weight. So the mass of the counter weight varies inversely proportional to the distance from centre line. |
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| Posted by: Alexs ® 10/06/2009, 11:10:16 Author Profile eMail author Edit |
Hello, does any one can provide such service? i have some 26cc motors, and i want to balance the cranks..
Admin: removed email address Modified by Administrator at Tue, Oct 06, 2009, 11:11:56 |
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