buying single crank arms?

"Small Black Dog" <[email hidden]> skrev i en meddelelse
"]news:[email hidden]...

Quoted message said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that the
pedal thread inside my XT drive-side crank

was

Quoted message said:

stripped. I unscrewed the pedal with some difficulty and got greeted with some thread-shaped
shavings :\ I re-installed the pedal having to chase my own threads as it were, I dont have much
hope for it lasting very long.

Buy a used one, i have never seen a store selling a single arm. But why bother, a complete XT
crankset costs 79dollars, cheap cheap...

Peter Dk

"Small Black Dog" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that the
pedal thread inside my XT drive-side crank was stripped. I unscrewed the pedal with some
difficulty and got greeted with some thread-shaped shavings :\ I re-installed the pedal having to
chase my own threads as it were, I dont have much hope for it lasting very long.

A helicoil, tap, & a big drill bit shouldn't cost too much. Or you could have the LBS install the
helicoil and save the cost of the tap & drill bit. Fortunately it's drive side, which has right-hand
threads. Dunno about helicoils & taps for the other side.

"Small Black Dog" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that the
pedal thread inside my XT drive-side crank

was

Quoted message said:

stripped. I unscrewed the pedal with some difficulty and got greeted with some thread-shaped
shavings :\ I re-installed the pedal having to chase my own threads as it were, I dont have much
hope for it lasting very long.

Small Black Dog

<psssst>

Duuuuuude look at the shape. You could modify the extra and make a really cool pipe.

I like you Cinder Girl! 🙂

--
- Zilla Cary, NC (Remove XSPAM)

"Cinder Girl" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Small Black Dog" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that
the pedal thread inside my XT drive-side crank

was

Quoted message said:

stripped. I unscrewed the pedal with some difficulty and got greeted

with

Quoted message said:

Quoted message said:

some thread-shaped shavings :\ I re-installed the pedal having to chase

my

Quoted message said:

Quoted message said:

own threads as it were, I dont have much hope for it lasting very long.

Small Black Dog

<psssst>

Duuuuuude look at the shape. You could modify the extra and make a really cool pipe.

"Zilla" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I like you Cinder Girl! 🙂

--
- Zilla Cary, NC (Remove XSPAM)

"Cinder Girl" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Small Black Dog" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that
the pedal thread inside my XT drive-side

crank

Quoted message said:

Quoted message said:

was

Quoted message said:

stripped. I unscrewed the pedal with some difficulty and got greeted

with

Quoted message said:

Quoted message said:

some thread-shaped shavings :\ I re-installed the pedal having to

chase

Quoted message said:

my

Quoted message said:

Quoted message said:

own threads as it were, I dont have much hope for it lasting very

long.

Quoted message said:

Quoted message said:

Quoted message said:

Small Black Dog

<psssst>

Duuuuuude look at the shape. You could modify the extra and make a

really

Quoted message said:

Quoted message said:

cool pipe.

Just make sure it isn't a fancy smancy magnesium one... yowch!

Jon Bond

Small Black Dog said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that the
pedal thread inside my XT drive-side crank was stripped. I unscrewed the pedal with some
difficulty and got greeted with some thread-shaped shavings :\ I re-installed the pedal having to
chase my own threads as it were, I dont have much hope for it lasting very long.

Small Black Dog

In the future just remember: Righty tighty, lefty loosey........... No more stripped crank-arms
! Yea.....

~Travis

#include <Runyon>
--
travis57 at megalink dot net

travis5765.homelinux.net, Primary Administrator TF Custom Electronics, Owner/Founder/Developer
(current project: Automotive exhaust flame-thrower)

David <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Small Black Dog" <[email hidden]> wrote in message

"]news:[email hidden]...

Quoted message said:

Quoted message said:

Is it possible to buy single crank arms? On a recent pedal-regreasing adventure I noticed that
the pedal thread inside my XT drive-side crank

was

Quoted message said:

Quoted message said:

stripped. I unscrewed the pedal with some difficulty and got greeted

with

Quoted message said:

Quoted message said:

some thread-shaped shavings :\ I re-installed the pedal having to chase

my

Quoted message said:

Quoted message said:

own threads as it were, I dont have much hope for it lasting very long.

A helicoil, tap, & a big drill bit shouldn't cost too much. Or you could

have the LBS install

Quoted message said:

the helicoil and save the cost of the tap & drill bit. Fortunately it's

drive side, which has

Quoted message said:

right-hand threads. Dunno about helicoils & taps for the other side.

It's easy - for left hand threads, just put the coil in from the other side.

HTH!

Shaun aRe - Wisdom of the ancients in a young body.

Shaun Rimmer said:

It's easy - for left hand threads, just put the coil in from the other side.

Good Day,

I am fairly new to the group, but have been reading the past two months worth of posts (fairly good
news-server). Lots of good information in this newsgroup.

I will have to say that I do not know what a "helicoil" is, so I am lost on that part......

I just want to say that I do not think that putting a right hand tap in the back side and then
cleaning the threads will produce left hand threads. Sort of like a nut on a bolt, no matter which
side you try to put it onto the bolt, it is still right hand threads. You will need a left hand
thread tap to produce the left hand threads. (I have seen engineers argue this fact, and actually
flip a nut over a dozen times before they came to the conclusion you have to have a left hand
threaded nut for a left hand threaded bolt....)

Just my $.02 worth....

Gazmuth

"Lord Gazmuth" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Shaun Rimmer said:

It's easy - for left hand threads, just put the coil in from the other side.

Good Day,

I am fairly new to the group, but have been reading the past two months worth of posts (fairly
good news-server). Lots of good information in this newsgroup.

I will have to say that I do not know what a "helicoil" is, so I am lost on that part......

A quick websearch would clear it up. Or you could go to www.helicoil.com.

Quoted message said:

(I have seen engineers argue this fact, and actually flip a nut over a dozen times before they
came to the conclusion you have to have a left hand threaded nut for a left hand threaded
bolt....)

You've seen this? Are you kidding? Shaun was.

David said:

Quoted message said:

(I have seen engineers argue this fact, and actually flip a nut over a dozen times before they
came to the conclusion you have to have a left hand threaded nut for a left hand threaded
bolt....)

You've seen this? Are you kidding? Shaun was.

Oh yes!!!

I work in an oil refinery, and actually watched an engineer work for about 15 minutes trying to put
a right handed nut on a left handed threaded bolt. He kept flipping it over and over, and then
actually went to the free bin and got another nut and tried it numerous times....

After not succeeding, he then actually called up a machinist who told him that you needed a left
handed tap to make it work... he would not believe the machinist, so he then called his supervisor.
That engineer is no longer working for the company....

Then I watched another engineer do pretty much the same thing after arguing that all you had to do
was flip the nut over. Needless to say, he called the warehouse, and they told him they would order
the correct nut. He was redfaced, but is still working for the company. A little wiser (but
redfaced).

In the industry I work in, you do have several applications on pumps and compressors that use left
handed bolts and nuts, and so if you are not familiar with the machinery, then you may bust a part
trying to get it off the machine.

And yes, after I spelled "helicoil" into Google, (without spelling mistakes) and after I posted, I
found what it was.... but I do appreciate your information. I should have known it was another word
for a "tap and die". (my face is red now)

Gazmuth

"Lord Gazmuth" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I work in an oil refinery, and actually watched an engineer work for about 15 minutes trying to
put a right handed nut on a left handed threaded bolt.

...

Quoted message said:

Then I watched another engineer do pretty much the same thing after arguing that all you had to do
was flip the nut over.

Thanks for the story. Do you know if those guys were PEs (registered professional engineers)?

Quoted message said:

And yes, after I spelled "helicoil" into Google, (without spelling mistakes) and after I posted, I
found what it was.... but I do appreciate your information. I should have known it was another
word for a "tap and die". (my face is red now)

Since the original threads are ruined, you drill & tap the hole a little larger, and screw in a
steel coil (the Helicoil) that replaces the original threads.

David, PE

Lord Gazmuth <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Shaun Rimmer said:

It's easy - for left hand threads, just put the coil in from the other

side.

Quoted message said:

Quoted message said:

Good Day,

I am fairly new to the group, but have been reading the past two months worth of posts (fairly
good news-server). Lots of good information in this newsgroup.

I will have to say that I do not know what a "helicoil" is, so I am lost on that part......

It resembles a coiled spring, but instead of round cross section wire, it's made from square section
wire, set 'diamond' wise. For stripped threads, the hole is drilled and tapped to the size of the
helicoil, then it is 'screwed' in, and locked in place, usually by knocking the ends of the hole
thread with something like a centre-punch.

Hope that helpS!

Quoted message said:

I just want to say that I do not think that putting a right hand tap in the back side

That would make sitting rather unconfortable..........

Quoted message said:

and then cleaning the threads will produce left hand threads. Sort of like a nut on a bolt, no
matter which side you try to put it onto the bolt, it is still right hand threads. You will need a
left hand thread tap to produce the left hand threads. (I have seen engineers argue this fact, and
actually flip a nut over a dozen times before they came to the conclusion you have to have a left
hand threaded nut for a left hand threaded bolt....)

D'oh! That's where I've been going wrong then ',;~}~

Shaun aRe - Sorry, my original comment was supposed to be blatant humour, heheheheh........ ',;~}~