I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of the lug, so I can't grab the screw and twist it out. There's no hole on the other side of the seat stay, so I can't access the front of the screw either.
It gets better :-) Thinking myself Joe Handyman, I grab a cordless drill and drill a hole in the center of the screw about 4mm deep. Then I grabbed a 4-40 tap and slowly worked it in. My plan was to reverse the tap, which should back the screw out -- usually the friction of a screw thread is less than a tap that's making new threads... all the while leaving the lug threads undamaged because the tap diameter is less than the lug's.
I hit the drill reverse and slowly applied power and... snap, the tap broke off, leaving the screw and a portion of the tap stuck inside the lug.
"Elliott" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of the lug, so I can't grab the screw and twist it out. There's no hole on
the
Quoted message said:
other side of the seat stay, so I can't access the front of the screw either.
It gets better :-) Thinking myself Joe Handyman, I grab a cordless drill and drill a hole in the center of the screw about 4mm deep. Then I grabbed a 4-40 tap and slowly worked it in. My plan was to reverse the tap, which should back the screw out -- usually the friction of a screw thread is
less
Quoted message said:
than a tap that's making new threads... all the while leaving the lug threads undamaged because the tap diameter is less than the lug's.
I hit the drill reverse and slowly applied power and... snap, the tap
broke
Quoted message said:
off, leaving the screw and a portion of the tap stuck inside the lug.
Now what do I do?
Can the tap/screw remnants be screwed in, so they would fall inside the seat tube? And if the rattling around really bugged you, the bottom bracket could be removed and the offending pieces removed.
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of the lug, so I can't grab the screw and twist it out. There's no hole on the other side of the seat stay, so I can't access the front of the screw either.
It gets better :-) Thinking myself Joe Handyman, I grab a cordless drill and drill a hole in the center of the screw about 4mm deep. Then I grabbed a 4-40 tap and slowly worked it in. My plan was to reverse the tap, which should back the screw out -- usually the friction of a screw thread is less than a tap that's making new threads... all the while leaving the lug threads undamaged because the tap diameter is less than the lug's.
I hit the drill reverse and slowly applied power and... snap, the tap broke off, leaving the screw and a portion of the tap stuck inside the lug.
Now what do I do?
Drive it forward until it drops to the inside and then fish it out of the bottom bracket shell? Or remove the seat and turn the bike over.
Using short pieces of steel piano wire, you could push two or three pieces into the flutes of the tap. Then grab the wires with a monkey wrench or clamp and spin the stud (nee bolt) forward.
I have never been successful backing out a broken-off small tap. Maybe someone else will have a good method. And I avoid using hand-held power tools with small taps- too easy to snap off. A hand-operated tap holder is much safer.
I hit the drill reverse and slowly applied power and... snap, the tap broke
off, leaving the screw and a portion of the tap stuck inside the lug.
Now what do I do?
Try a real screw extrsctor although the broken tap will make that tough. Faiing that, spark erosion but it'lll be expensive and I don't know what it'll do to the paint. Phil Brown
Get a set of "easy-outs". They are aggressive reverse- threaded bits, like a cross between a tap and a drill bit. Try to use a hand tool vs. a drill motor with these as well. Best of luck. -VIGILANTE
"NINPO IKKAN!"
"Elliott" wrote in message "]news:[email hidden]...
Quoted message said:
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of the lug, so I can't grab the screw and twist it out. There's no hole on
the
Quoted message said:
other side of the seat stay, so I can't access the front of the screw either.off, leaving the screw and a portion of the tap stuck inside the
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of the lug, so I can't grab the screw and twist it out. There's no hole on the other side of the seat stay, so I can't access the front of the screw either.
It gets better :-) Thinking myself Joe Handyman, I grab a cordless drill and drill a hole in the center of the screw about 4mm deep. Then I grabbed a 4-40 tap and slowly worked it in. My plan was to reverse the tap, which should back the screw out -- usually the friction of a screw thread is less than a tap that's making new threads... all the while leaving the lug threads undamaged because the tap diameter is less than the lug's.
I hit the drill reverse and slowly applied power and... snap, the tap broke off, leaving the screw and a portion of the tap stuck inside the lug.
Now what do I do?
Can you completely drill it out and re-tap the hole?
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. ... I hit the drill reverse and slowly applied power and... snap, the tap broke off, leaving the screw and a portion of the tap stuck inside the lug.
Quoted message said:
Now what do I do?
4. Take pictures and put them on the web so we can all see and laugh at your predicament.
5. Try a better religion.
6. Have you considered an exorcist for this bike frame ? Sometimes that helps.
------ and the #1 suggestion for what to do with this bikeframe -------
7. Give it to somebody else to fix. Clearly, you and it are not a good match.
"VIGILANTE" <[email hidden]> wrote in :"]news:[email hidden]:
Quoted message said:
Get a set of "easy-outs". They are aggressive reverse- threaded bits, like a cross between a tap and a drill bit. Try to use a hand tool vs. a drill motor with these as well. Best of luck. - VIGILANTE
Quoted message said:
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of the lug, so I can't grab the screw and twist it out. There's no hole on
the
Quoted message said:
other side of the seat stay, so I can't access the front of the screw either.off, leaving the screw and a portion of the tap stuck inside the
lug.
Thanks, haven't used easy-outs before. I'll take your suggestion. Off to the hardware store I go...
[email hidden] (Donald Gillies) wrote in news:c37hpq$7rl$1 @cascade.cs.ubc.ca:
Quoted message said:
Elliott said:
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. ... I hit the drill reverse and slowly applied power and... snap, the tap broke off, leaving the screw and a portion of the tap stuck inside the lug.
Quoted message said:
Now what do I do?
4. Take pictures and put them on the web so we can all see and laugh at your predicament.
3. Try a better religion.
2. Have you considered an exorcist for this bike frame ? Sometimes that helps.
------ and the #1 suggestion for what to do with this bikeframe -------
1. Give it to somebody else to fix. Clearly, you and it are not a good match.
- Don Gillies San Diego, CA
I was hoping for some humorous abuse and I got it... but you know, Dave Letterman comes up with 10 but you only managed 4. You're kinda slacking off there, Don.
I really went and did it now. Was tightening a 5mm Allen cap screw into a seat stay lug and the head of the screw snapped off, leaving the threaded part of the screw embedded inside the lug. It broke off beneath the top of
Quoted message said:
and drill a hole in the center of the screw about 4mm deep. Then I grabbed a 4-40 tap and slowly worked it in. My plan was to reverse the tap, which
Quoted message said:
I hit the drill reverse and slowly applied power and... snap, the tap broke off, leaving the screw and a portion of the tap stuck inside the lug.
Now what do I do?
A Dremel with a diamond-blade cutter might be able to notch it.
I recently stumbled across this stuff which might help: right-right-Open ↗ tool.com/screwgrab.html -- Rick Onanian
