47t sprocket & chain replacement; sprocket bolt hole stripped

Sullybiker · 04-06-2017, 10:52 PM

The hub is very soft. I was surprised how easily I could drill out the hole, It was like wood. and the tap cut the metal very easily too. I spent a lot of time cleaning the bolts and chasing out the holes as I think a lot of swarf was in them.

I didn't loctite the old ones, just the helicoil.I did tighten to 35ft.lb very, very carefully and they've been fine.

These things happen on bikes but it's always a pain when you don't have the bits you need available.

04-06-2017, 10:52 PM	#1
Sullybiker Join Date: Dec 2016 Location: Western PA Posts: 363	The hub is very soft. I was surprised how easily I could drill out the hole, It was like wood. and the tap cut the metal very easily too. I spent a lot of time cleaning the bolts and chasing out the holes as I think a lot of swarf was in them. I didn't loctite the old ones, just the helicoil.I did tighten to 35ft.lb very, very carefully and they've been fine. These things happen on bikes but it's always a pain when you don't have the bits you need available.
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