Crankshaft Balancing 1

Part 1 of crankshaft being balanced

[@bobawatsit]

what is the rational of using bob weights on an in plane crank of any number of cylinders, if the weights of the reciprocating/piston weights are identical

[@jimmydean9006]

What is the name of that machine the actual tool like in general and that specific model. Is it just called "balancer"?

[@cozzm0AU]

Check the Engine Parts Balancing video, it explains bob weight calculation.

[@YouTubeChannel2000]

Please provide the link of the video which describes how to calculate the bob weights.

[@natashagoushey9149]

Is your machines belt position considered a variable in measurement? It seems close to one side of the crank. (front side.) Would a belt positioned in the center of crank be more accurate? Or do the machine crank supports eliminate that variable?

[@UniqueZed]

It does not matter where the belt is positioned.

[@brianheiden6623]

Quality build for sure.

[@V-ValveSupercharged]

I also need to balance my V6 as well

[@danielhoffman2299]

Is there a standard formula for calculation the bob-weights ?

[@eaglebolek712]

100% rotating weight/mass (big rod end with bearing) +50% reciprocating weight/mass (piston with wrist pin, wrist pin locks, and small rod end)

[@1magnit]

@@eaglebolek712 Only when it's a 90 degree block. When it's a 60 deg block it's about 44% reciprocating. It's half of the sine of the bank angle.

[@1magnit]

The bobweights need to be concentric otherwise inaccurate. The extra weights hanging off the ends are added as vectors otherwise but still inaccurate.

[@fordescort1800]

so how do you calculate how far in the drill goes and how do you calculate how much weight in meterial it will remove?

[@UniqueZed]

From experience and checking after drilling then drill and check and so on.

[@bobawatsit]

Ah, I see it is a V engine, then use bob weights, but you set TDC on No1 throw by EYE ?? then go and set your bob weight with a level F.... Me

[@fordescort1800]

what does that BIG red button do on the computor thing? i would love to press that

[@jorgemartinez8373]

Thats the faster button

[@wolfy9005]

Usually emergency stop

[@aullalaloba]

very good but bored

[@richardture4261]

Kill the background noise or put a mike on....can't hear what your saying at times....besides the background noise is annoying.