It's pretty simple:
1st mark and measure the exsisting pole pieces at the bottom of the bobbin, I use a fine tip Sharpie. The magnets have to go back in the same way as they were removed in order to keep the polarity the same, this is easy if you cut the magnets 1 at a time as it will show the cutting marks. Use a pair of pliers to grip the magnets, then turn them as you pull up removing it from the bobbin. I leave the pickup together as I do this that way there is no chance of harming the coil. Once you have the magnet out place it in a machinist vise or one of the inexpensive ones from Harbor Freight. Secure the magnet in the vise with the end to be cut off protruding, then use a cutting blade in your drill press.
Set the blade depth to match the cutting line on the magnet, then use your hands on the vise to push the magnet into the rotation of the cutting blade. When finished the magnets can be pushed right back into the bobbin. They will be a nice tight compression fit and won't fall out, just be sure that they go back in polarity correct. If you have access to machinist tools such as a lathe then it makes it pretty simple to chuck the magnets up and use the cutter on the lathe. You can take it a step further and make a new aluminum plate that covers the bottom with only 2 holes in it like the 50s toaster pickups.
iiipopes wrote:...you have to make sure you don't overheat them, as they will lose their gauss and not be rechargeable.
rkbsound wrote:I didn't know short poles were rare...I have one from a '66 sitting in a drawer waiting for a project.
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