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Just tried using a heat gun to set a tight headset bearing race
I was putting a new headset on a steel frame and the lower race would not go on, even with a big hammer and block. Out of ideas, I grabbed my heat gun and warmed the fork crown for about 90 seconds. The race slid right on with just hand pressure, no hammer needed. I let it cool and it's locked on solid. I always thought that trick was just for press-fit bottom brackets. Anyone else use heat for stubborn press fits on frames?
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alicemurphy1mo ago
It's funny how often we reach for force first. I see it all the time, people trying to muscle through a problem when a little patience and the right method works better. It's not just bike repair, it's like trying to open a stuck jar lid. Running it under hot water is the answer, not just a stronger grip. We forget that materials change with temperature, and working with that fact is smarter than fighting it.
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Actually, that heat trick is pretty standard for any steel press-fit (headsets, bottom brackets, even some old seatposts). The key is heating the frame, not the part, so it expands just enough. Hannah320, a hammer still has its place, but heat is way cleaner and you avoid the risk of bending something. Just don't overdo it and cook the paint.
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