Rounded Stem Bolt on PX10LE
08-21-20, 07:31 PM
#1
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Thread Starter
Rounded Stem Bolt on PX10LE
In the past, even when decent, the stem bolts are always difficult to move on some of the old Peugeot bikes I've worked on. This one is rounded. I've tried to put rubber between the hex and the bolt. Speed out and an Irwin extractor set didn't work. I'm not sure how to proceed. Thanks!
08-21-20, 07:38 PM
#2
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In the past, even when decent, the stem bolts are always difficult to move on some of the old Peugeot bikes I've worked on. This one is rounded. I've tried to put rubber between the hex and the bolt. Speed out and an Irwin extractor set didn't work. I'm not sure how to proceed. Thanks!
08-21-20, 07:49 PM
#4
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I wish my old UO-8 bolt had a rounded head! I hit my sternum on it hard! back in a distant millennium. I forgot to look but I am pretty sure you could select the wrench size from my chest.
Oh, you mean those recessed allen key bolts? Where round is bad?
Meziac, I spared you . No pics.
Oh, you mean those recessed allen key bolts? Where round is bad?
Meziac, I spared you . No pics.
08-21-20, 08:31 PM
#5
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I wish my old UO-8 bolt had a rounded head! I hit my sternum on it hard! back in a distant millennium. I forgot to look but I am pretty sure you could select the wrench size from my chest.
Oh, you mean those recessed allen key bolts? Where round is bad?
Meziac, I spared you . No pics.
Oh, you mean those recessed allen key bolts? Where round is bad?
Meziac, I spared you . No pics.
I would rather have a rounded out allen that can be worked with another size hex or Torx/splined extractor tapped inplace if necessary.
Never had anything I couldn't get out some way like this, as always, patience is key.
Last edited by merziac; 08-21-20 at 08:39 PM.
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08-21-20, 08:52 PM
#6
Senior Member
If it's a "conventional" bolt, not allen, try some other brands of extractor similar to the Irwin. Myself, I've had best results with the Irwin product. Sometimes you have to try the closest smaller size of the "other" standard (i.e. if it's a metric bolt, try an SAE extractor, or vice-versa). I've even had some good luck with the Harbor Freight product. My only disappointment was with the Sears Craftsman; I had one bolt on a belt tensioner on my Saturn that actually damaged the Craftsman tool, so I returned it.
08-22-20, 12:19 AM
#7
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You'll need to use a small, quality, sharp drill bit to deepen the center of the hole by 1/8", then progressively increase the drill bit size to 5/16". This should remove the bolt head and allow you to impact the bolt downward using a 5/16" drift and hammer.
Hopefully then you can find a new suitable socket-heat bolt replacement from another stem. May have to re-tap the threads in the expander plug to match a different country's bolt threading(?).
Start by shooting penetrent into the lower end opening of the steerer tube.
Hopefully then you can find a new suitable socket-heat bolt replacement from another stem. May have to re-tap the threads in the expander plug to match a different country's bolt threading(?).
Start by shooting penetrent into the lower end opening of the steerer tube.
08-23-20, 12:37 PM
#9
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Thread Starter
First pic is the bolt with a hole drilled into it. Second are the extractors I have. The original hex size was too big for any of my torx, but I will try to put one in the new smaller area.
08-23-20, 12:40 PM
#10
Member
Thread Starter
You'll need to use a small, quality, sharp drill bit to deepen the center of the hole by 1/8", then progressively increase the drill bit size to 5/16". This should remove the bolt head and allow you to impact the bolt downward using a 5/16" drift and hammer.
Hopefully then you can find a new suitable socket-heat bolt replacement from another stem. May have to re-tap the threads in the expander plug to match a different country's bolt threading(?).
Start by shooting penetrent into the lower end opening of the steerer tube.
Hopefully then you can find a new suitable socket-heat bolt replacement from another stem. May have to re-tap the threads in the expander plug to match a different country's bolt threading(?).
Start by shooting penetrent into the lower end opening of the steerer tube.
08-23-20, 02:49 PM
#11
Senior Member
It _should_ send the expander away from the main body of the stem, un-sticking it. Once the bolt head is gone, a moderate upward mallet blow on the underside if the stem might have the same effect.
