Stripped crank threads
07-24-18, 10:04 PM
#2
Really Old Senior Member
07-25-18, 04:48 AM
#3
Senior Member
Depending on the style of your crank, you could try a gear puller (probably a three-arm type if your crank is a five-arm type so that there are gaps through which the puller can fit).
There's a discussion of the practicalities you should be aware of before using gear pullers for this purpose in this thread, which I'd recommend you read before starting (especially AEO's post).
There's a discussion of the practicalities you should be aware of before using gear pullers for this purpose in this thread, which I'd recommend you read before starting (especially AEO's post).
07-25-18, 05:59 AM
#4
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,782
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3587 Post(s)
Liked 3,398 Times
in
1,932 Posts
The low budget method is to remove the retaining bolt and ride around the block until the arm falls off on its own. Then walk home to avoid damaging the arm.
Jacobs chuck wedges and gear pullers also work, and there are kits that will cut new threads into a stripped arm. These last tend to be too expensive for one-off jobs, but your LBS my already have such a kit.
Jacobs chuck wedges and gear pullers also work, and there are kits that will cut new threads into a stripped arm. These last tend to be too expensive for one-off jobs, but your LBS my already have such a kit.
07-25-18, 07:17 AM
#5
Senior Member
Join Date: Aug 2015
Posts: 3,292
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1140 Post(s)
Liked 1,736 Times
in
957 Posts
The last time I did that I used pickle fork, 2 prong wedge.
I have also disassembled all that a could, with a loosened the crank bolt when the arm is against the outside of the cup I would smack the bolt with a hammer. It's not good for the bolt but it worked for me at the time.
I have also disassembled all that a could, with a loosened the crank bolt when the arm is against the outside of the cup I would smack the bolt with a hammer. It's not good for the bolt but it worked for me at the time.
07-25-18, 10:07 AM
#6
Friendship is Magic
Join Date: Nov 2010
Location: Sacramento, CA
Posts: 22,984
Bikes: old ones
Mentioned: 304 Post(s)
Tagged: 0 Thread(s)
Quoted: 26400 Post(s)
Liked 10,373 Times
in
7,202 Posts
