balancing

Best way once Dead Centre is found is to balance it on that point (Static Balance), identify the lowest point and remove a Small amount of material (Probably Drilling is best)

Repeat until balance is good. Worst case...re-cast and start again.

Check the link for Loinel's Lab (from previous post). He has detailed instructions there too.

Regards,
Sapper

Candoitall

A good machine shop or tire shop will be able to balance the fan itself for you. The best way is to have it installed and have a local millwright firm come in and strobe it out. They should be able to do the balancing in as little as 2 hrs.. The reason you want it in place is because, the key might be too short or long. The shaft itself may have a little bit of play or off center. The hub mount might not be true. They will check this all out for you as part of the balancing.

An added note, the money that you spend on a proper balanced fan will pay itself back, in as little as two years, by using less energy to run. Have them do an Amp. draw before and after and then do the math.

$= Delta I x E x hrs x $ per kWhr (the basic, no vars etc.)