Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Seized rotor bolts

Search
Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Seized rotor bolts

Thread Tools
 
Search this Thread
 
Old 12-29-23, 12:13 PM
  #26  
sfh
Junior Member
Thread Starter
 
Join Date: Aug 2013
Posts: 113
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
So . .. went one for two. The first seized bolt came right out — drilled a 1/16” pilot. Then used the heat gun and it pulled right out with a 1/8” reverse drill on low speed.

The second bolt . . . Not good, and I think the hub is likely lost. The bolt didn’t budge with the 1/8” reverse bit. I used the 1/8” extractor and got some movement. Then I drilled with a 5/32” reverse bit and took the 5/32” extractor. The bolt split down the middle, and I’m only able to remove half of it. The rest is helplessly crushed in the threads, and I think the extractor has widened the hole too much to recover. Not a great loss if that’s the case. If nothing else, I’ll have a wheel for some shop practice.

before/after . . .


sfh is offline  
Old 12-29-23, 12:42 PM
  #27  
base2 
I am potato.
 
base2's Avatar
 
Join Date: Jun 2015
Location: Pacific Northwest
Posts: 3,116

Bikes: Only precision built, custom high performance elitist machines of the highest caliber. 🍆

Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 1789 Post(s)
Liked 1,630 Times in 934 Posts
There needs to be an unlike button.

You might still be able to install a bolt and use a nut on the backside. But dang, it is kind of hack-ish at this point.

Re-hub the wheel? You have the spokes & rim already.
base2 is offline  
Old 12-29-23, 01:06 PM
  #28  
WizardOfBoz
Generally bewildered
 
WizardOfBoz's Avatar
 
Join Date: Aug 2015
Location: Eastern PA, USA
Posts: 3,037

Bikes: 2014 Trek Domane 6.9, 1999 LeMond Zurich, 1978 Schwinn Superior

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1152 Post(s)
Liked 341 Times in 251 Posts
1) You might be able to run with only 4 bolts. Use antisieze! Torque, accounting for anti-sieze!
2) You might be able to drill out the hole, thread with a size larger, and use an insert (like Helicoil).
WizardOfBoz is offline  
Old 12-29-23, 03:14 PM
  #29  
sfh
Junior Member
Thread Starter
 
Join Date: Aug 2013
Posts: 113
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by WizardOfBoz
1) You might be able to run with only 4 bolts. Use antisieze! Torque, accounting for anti-sieze!
Yes. Anti-sieze purchased and ready. The goal of the project was to remove the brake rotor to put it on another wheel. Certainly will use antisieze on that wheel.

It's been an educational experience for sure, so all is not lost. But really it would have been easier, faster, and cheaper to just buy new rotors!

2) You might be able to drill out the hole, thread with a size larger, and use an insert (like Helicoil).
I'm not sure the hole is still round though. At my work, we have a machine shop with a skilled machinist. I might see if they have a way to do this.
sfh is offline  
Old 12-29-23, 03:17 PM
  #30  
sfh
Junior Member
Thread Starter
 
Join Date: Aug 2013
Posts: 113
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by base2
There needs to be an unlike button.

You might still be able to install a bolt and use a nut on the backside. But dang, it is kind of hack-ish at this point.

Re-hub the wheel? You have the spokes & rim already.

Re-hub is an option, but this is not a high-value wheel. It's a take-off OE from my Surly. There was recently a pair of identical wheels front/rear for sale in my area for $150 in new condition. Chatted the seller, and he had them up for 6 weeks with no inquiries. So if I re-hub it, it's to learn how to re-hub a wheel. I prefer that to a franked-wheel which is what this looks like.

Too bad. That first bolt came undone just they way I'd hoped (given the situation I put myself in).
sfh is offline  
Old 12-29-23, 04:00 PM
  #31  
Chuck M 
Happy With My Bikes
 
Chuck M's Avatar
 
Join Date: Sep 2020
Location: Oklahoma
Posts: 2,187

Bikes: Hi-Ten bike boomers, a Trek Domane and some projects

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 884 Post(s)
Liked 2,308 Times in 1,118 Posts
Originally Posted by sfh
At my work, we have a machine shop with a skilled machinist. I might see if they have a way to do this.
If you can, take him a rotor too so he can easily see just how far off and out of round the hole is.
__________________
"It is the unknown around the corner that turns my wheels." -- Heinz Stücke

Chuck M is offline  
Likes For Chuck M:
Old 12-29-23, 09:25 PM
  #32  
CrimsonEclipse
Senior Member
 
Join Date: Dec 2004
Posts: 1,098
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 559 Post(s)
Liked 648 Times in 381 Posts
On the bright side, you get a new hub!
CrimsonEclipse is offline  
Old 01-12-24, 11:25 PM
  #33  
soyabean
Senior Member
 
soyabean's Avatar
 
Join Date: Feb 2022
Location: GMT-5
Posts: 939
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 540 Post(s)
Liked 416 Times in 274 Posts
Originally Posted by sfh
Then used the heat gun
I unfreeze bolts with a Benzomatic MAPP torch.

It needs to get hot in the thousands of degrees, not hundreds.

Burned paint is better than a pretty scrap.

Then again, not jumping the gun from the very beginning all drill happy is better than burned paint.
soyabean is offline  
Old 01-13-24, 03:13 AM
  #34  
choddo
Senior Member
 
Join Date: Apr 2019
Location: UK
Posts: 1,404
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 682 Post(s)
Liked 453 Times in 338 Posts
Originally Posted by soyabean
I unfreeze bolts with a Benzomatic MAPP torch.

It needs to get hot in the thousands of degrees, not hundreds.

Burned paint is better than a pretty scrap.

Then again, not jumping the gun from the very beginning all drill happy is better than burned paint.
Thousands of degrees and you’ll be more worried about molten steel than burned paint.
choddo is offline  
Old 01-13-24, 09:49 AM
  #35  
soyabean
Senior Member
 
soyabean's Avatar
 
Join Date: Feb 2022
Location: GMT-5
Posts: 939
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 540 Post(s)
Liked 416 Times in 274 Posts
Omg dude, I apply it for just a few seconds. To actually melt it, it would take about a few minutes.

Regardless, I know what I am doing, I do it all the time on the curb finds I flip, and this thread NEVER happens to me.

A hot air gun can remove decals and maybe paint, but otherwise a waste of time on seized fasteners.
soyabean is offline  
Old 01-13-24, 11:10 AM
  #36  
base2 
I am potato.
 
base2's Avatar
 
Join Date: Jun 2015
Location: Pacific Northwest
Posts: 3,116

Bikes: Only precision built, custom high performance elitist machines of the highest caliber. 🍆

Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 1789 Post(s)
Liked 1,630 Times in 934 Posts
Originally Posted by choddo
Thousands of degrees and you’ll be more worried about molten steel than burned paint.
Icarus didn't burn because he flew too close to the sun. He burned because he flew close to the sun for too long.
__________________
I shouldn't have to "make myself more visible;" Drivers should just stop running people over.

Car dependency is a tax.
base2 is offline  
Likes For base2:
Old 01-13-24, 04:24 PM
  #37  
choddo
Senior Member
 
Join Date: Apr 2019
Location: UK
Posts: 1,404
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 682 Post(s)
Liked 453 Times in 338 Posts
Originally Posted by soyabean
Omg dude, I apply it for just a few seconds. To actually melt it, it would take about a few minutes.

Regardless, I know what I am doing, I do it all the time on the curb finds I flip, and this thread NEVER happens to me.

A hot air gun can remove decals and maybe paint, but otherwise a waste of time on seized fasteners.
Oh I’m sure you do. I don’t reckon it gets to (or needs to get to) thousands of degrees though, not even °F.
choddo is offline  
Old 01-14-24, 02:55 PM
  #38  
sfh
Junior Member
Thread Starter
 
Join Date: Aug 2013
Posts: 113
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by soyabean
I unfreeze bolts with a Benzomatic MAPP torch.

It needs to get hot in the thousands of degrees, not hundreds.

Burned paint is better than a pretty scrap.

Then again, not jumping the gun from the very beginning all drill happy is better than burned paint.
Right. Honestly, the whole thing got in motion because I was in a hurry when I first noticed they didn't turn as easily as I wanted. Should have been a lot more cautious then instead of rounding out the first bolt. Stupid. But over and done.

I just did the rear wheel today. Had it properly prepared (maybe over prepared with penetrating oil), and all 6 bolts came out as I'd expect they would. Had my pen torch in reach, but didn't need it.

Thanks all for the comments. New wheels on the bike now, and it's ready to roll.

Last edited by sfh; 01-14-24 at 06:54 PM.
sfh is offline  
Likes For sfh:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.