Used to remove a bearing from a bicycle frame. The 15mm puller was slightly larger than the 15mm puller when fully compressed. I had to grind it down a bit to fit the 15mm bearings, then it pulled them out slightly. I couldn't muster the strength to get my 20mm bearings right out of the frame with a drift. A slide hammer pulled the mandrel from inside the bearing. Once I could run them out with the punch/hammer from the opposite side, I was THEN able to easily pull them out with the extractor/slam hammer. Not sure how this will handle larger jobs, especially bearings that go through heat cycles, but it should work well enough for my bikes/hubs if the pullers hold up.
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