Bottom bracket, wrong thread?
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In my Peugeot bike restoration project, I removed the Nervar cottered cranks to be able to service the bottom bracket.
Because removing these cotters was a true pain (I had to drill a pin out :-( ), I decided to replace them with a square tapered bottom bracket and crankset.
The old fixed cup is left hand threaded, which is a good thing as far as I have read. (Since it's a bike from the 80's, I don't think it's using the french *strange
threading..., or does it?)
Here's a picture of the old fixed cup with a thread gauge, it fits the 1mm thread perfectly.
And here's me screwing it in very smoothly.
https://streamable.com/uuv5h
I got a BB-UN55 (68, BC1.37x24 D-NL) sealed bottom bracket replacement. Screwing it in starts fine, but the last 3mm won't screw in.. (Even using a bottom bracket tool, it still doesn't budge...)
https://streamable.com/ipzvb
What could be the issue here? Should I have my bottom bracket tapped? I also checked the bottom bracket thread with the gauge, and perhaps it doesn't line up perfectly... Should I buy another bottom bracket?
Because removing these cotters was a true pain (I had to drill a pin out :-( ), I decided to replace them with a square tapered bottom bracket and crankset.
The old fixed cup is left hand threaded, which is a good thing as far as I have read. (Since it's a bike from the 80's, I don't think it's using the french *strange
threading..., or does it?)
Here's a picture of the old fixed cup with a thread gauge, it fits the 1mm thread perfectly.
And here's me screwing it in very smoothly.
https://streamable.com/uuv5h
I got a BB-UN55 (68, BC1.37x24 D-NL) sealed bottom bracket replacement. Screwing it in starts fine, but the last 3mm won't screw in.. (Even using a bottom bracket tool, it still doesn't budge...)
https://streamable.com/ipzvb
What could be the issue here? Should I have my bottom bracket tapped? I also checked the bottom bracket thread with the gauge, and perhaps it doesn't line up perfectly... Should I buy another bottom bracket?