Cast Aluminum Alloy Cooling Rotors

A customer sent us an aluminum alloy rotor used on a small engine manufactured some years ago. He wanted us to duplicate the rotor, but make one change. As shown in the second image below, there was one rotor fin that was too close to a bolt hole, so he wanted us to move that fin about 2mm to the right. Apparently that tight location made installation a bit of a headache. We moved the rotor as you can see in the first image. We had a batch of 100 of these cast and machined. Here is what this customer said upon receiving two samples for evaluation:

…just received 2 fan rings, PERFECT

First image above: New fin location  Second image: Previous fin location

Old and new side by side

100 new rotors

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