How to remove a broken bolt

Posts related to the restoration of Barracuda bikes.
Post Reply
User avatar
mixalive
Moderator
Moderator
Posts: 808
Joined: September 23rd, 2010, 12:03 pm
Location: Austin, TX

How to remove a broken bolt

Post by mixalive »

Here is a little instructional on how to remove a broken bolt. You can see the head of the crown pinch bolt is missing on the Marzocchi steerer. You can’t ride around like that.. :shock:
RB01.jpg
RB01.jpg (210.11 KiB) Viewed 6012 times


First, take a center punch and make an indentation in the center of the bolt. This is to help keep the drill bit centered in the next step.
RB02.jpg
RB02.jpg (221.93 KiB) Viewed 6012 times


Drill the bolt initially with a small drill bit.
RB03.jpg
RB03.jpg (227.03 KiB) Viewed 6012 times


Follow up with the recommended drill bit for the bolt extractor.
RB04.jpg
RB04.jpg (229.73 KiB) Viewed 6012 times


I put my bolt extractor in a tap T-handle. Give it a few taps with a hammer into the hole and you are ready for extraction.
RB05.jpg
RB05.jpg (233.13 KiB) Viewed 6012 times


If it doesn’t want to come out, you could apply heat to the extractor. This would tighten up the extractor and loosen up the bolt.
RB07.jpg
RB07.jpg (212 KiB) Viewed 6012 times


And, the broken bolt comes out..
RB08.jpg
RB08.jpg (203.88 KiB) Viewed 6012 times
93 A2R blue/white 14" Craigslist Austin, on the cheap
94 A2M silver/white 14" Cenna's Cycles SA, original owner
94 Cuda Comp purple/white 14" won on Ebay
95 XX Team gold/white 14" Craigslist Memphis

User avatar
Mark
Founder
Founder
Posts: 448
Joined: September 8th, 2010, 4:17 pm
Location: Toronto, ON
Contact:

Re: How to remove a broken bolt

Post by Mark »

Nice write-up!

Post Reply