Originally posted by billwarner9997
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K&J Magnetics - Products
That would work fine, and eliminate the need to double-stack the rotor magnets. Fifty of these goes for $42.50, and would provide you with 10 spare magnets. Naturally, if you use the same group layout, the space between each magnet will increase from 5/8" (at the outside perimeter) to 3/4". Likewise, if you plan to use the polycarbonate wedges between each magnet, as shown in the previous post photo, the wedges must be increased in width similarly.
Here's a tip for installing these on the steel bike wheel rim:
First, it is important that you locate a steel bike rim having a flat surface, so that the magnets adhere properly, so take a straight edge with you when selecting a wheel, to make sure. Some wheels have a crowned convex surface that may not be perceptible without holding a straight edge against the surface. If the straight edge can't be rocked, and doesn't show any light between the edge and the rim surface, then you have a good wheel.
Alternately mark off ten 1/4" divisions, and nine 3/4" divisions (between the 1/4" divisions), at the wheel rim's outside perimeter, using a sharp pointed magic marker pen. Hold a magnet at one end, between your thumb and forefinger, and keeping it a few inches away from the rim, but at the same level. Slowly move it in closer until the bottom of the magnet contacts the rim surface, and then slide it into position. Never attempt to set a magnet straight down onto the rim, as it will slam down when it gets close, and will either pinch your fingers or break, or both. Likewise, when you separate one magnet from another, the best way is to slide them apart. Placing one of the pair, or stack, upon a board edge, while pushing down on the unsupported magnet or magnets will allow for a sliding separation with the least effort.
Rick
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