Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the March Giveaway: Coming Soon 3/24


Rounded Nut!
#1
Hi guys. I am attempting to replace my bottom bracket but have been stopped at the first hurdle. The allen key nuts on the left crank have been rounded and are impossible to shift. Any handy tips to remove these without going down the butchering with drilling or grinding or heating with a blow torch route?? The crank is fixed by an allen key type nut on either side which splines the crank onto the axle. Sorry no photos available. The bike is an old Scott Fx2 zero which I am attempting with difficulty to restore. Thanks in advance.
  Reply
#2
If there is any part of the bolt head sticking up you could try "mole grips" or "stilsons" (pipe wrench.)
Failing that I think it will be drilling.
Another possible option is to use the next size "imperial" Allen key and force it into the rounded hole.
Just might be enough grip to loosen it?
The original bolt will be metric.!
Ride hard or ride home alone!
  Reply
#3
(12-29-2010, 12:16 PM)cyclerUK Wrote:  If there is any part of the bolt head sticking up you could try "mole grips" or "stilsons" (pipe wrench.)
Failing that I think it will be drilling.
Another possible option is to use the next size "imperial" Allen key and force it into the rounded hole.
Just might be enough grip to loosen it?
The original bolt will be metric.!

Thanks for reply. Unfortunately bolt is countersunk so grips not an option. Drill on charge.

Who said biking was easy.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post

Forum Jump:

[-]
10 Latest Posts
Santini fluted frame
Today 01:52 AM
2010 Specialized Hardrock
03-26-2024 09:16 PM
1990 Specialized Rockhopper How to Fluff...
03-25-2024 07:05 PM
Thread busted on right pedal crank
03-24-2024 08:52 PM
Trek domane tyre
03-24-2024 05:48 PM
Modern rims crack at spoke holes
03-24-2024 05:32 PM
Cup & Cone — Simple & Durable or PITA & ...
03-24-2024 04:53 PM
Falling back
03-24-2024 04:45 PM
Derailluer Hanger Alignment Tool
03-24-2024 02:51 PM
Chain sits on top of chainring when shif...
03-24-2024 02:41 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Painkiller
20 posts
no avatar 2. ReapThaWhirlwind
16 posts
no avatar 3. meamoantonio
15 posts
no avatar 4. GirishH
15 posts
no avatar 5. Jesper
15 posts