Titanium cogs spark when shifting

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

Bet it was the gold "quick link" flashing in the...er, fluorescent light.

Bill "either that or you REALLY spin" S.

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

That would almost make time spent on the hamster wheel worthwile -- almost.
Wonder if Shimano will begin to recommend a frame mounted fire extinguisher
for Dura-Ace use indoors.

Tom

no, i've seen these cogs spark too. i do a bit of night riding in the
winter and i watched a friend mash a shift on a grade. it's not like a
shower of sparks, but definitely a strike.

if it's a shimano chain, it reinforces sheldon's advice about pushing
the rivet in from the left, not the right so the slightly protuberant
broken side of the rivet does not cause any issues, this being one.

S o r n i said:

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

Bet it was the gold "quick link" flashing in the...er, fluorescent light.

Bill "either that or you REALLY spin" S.

tcmedara said:

That would almost make time spent on the hamster wheel worthwile --

almost.

Quoted message said:

Wonder if Shimano will begin to recommend a frame mounted fire

extinguisher

Quoted message said:

for Dura-Ace use indoors.

Yes, but they will insist that only a genuine Shimano fire extinguisher will
work.

Art Harris

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

Quoted message said:

tcmedara said:

That would almost make time spent on the hamster wheel worthwile --

almost.

Quoted message said:

Wonder if Shimano will begin to recommend a frame mounted fire

extinguisher

Quoted message said:

for Dura-Ace use indoors.

Yes, but they will insist that only a genuine Shimano fire extinguisher

will

Quoted message said:

work.

Art Harris

found this on the shimano website.

"Older Shimanoâ fire extinguishers will not be able to put out fires on the
2004 Shimanoâ groupset. To put out fires on the 2004 groupset owners must
buy the 2004 model. A nozzle upgrade kit is available to make the Shimanoâ
2003 extinguisher compatible with 2004 Shimanoâ fires. Shimanoâ 2004 fire
extinguishers are not backwards compatible with older Shimanoâ fires.
Shimanoâ fires can only be put out with genuine Shimanoâ fire extinguishers.
Advanced testing by some of the worlds top cyclists in the tough arena of
the Tour de France means that your Shimanoâ fire extinguisher will work on
the most demanding wind trainer."

Marty

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

Quoted message said:

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

Quoted message said:

tcmedara said:

That would almost make time spent on the hamster wheel worthwile --

almost.

Quoted message said:

Wonder if Shimano will begin to recommend a frame mounted fire

extinguisher

Quoted message said:

for Dura-Ace use indoors.

Yes, but they will insist that only a genuine Shimano fire extinguisher

will

Quoted message said:

work.

Art Harris

found this on the shimano website.

"Older Shimanoâ fire extinguishers will not be able to put out fires on

the

Quoted message said:

2004 Shimanoâ groupset. To put out fires on the 2004 groupset owners must
buy the 2004 model. A nozzle upgrade kit is available to make the Shimanoâ
2003 extinguisher compatible with 2004 Shimanoâ fires. Shimanoâ 2004 fire
extinguishers are not backwards compatible with older Shimanoâ fires.
Shimanoâ fires can only be put out with genuine Shimanoâ fire

extinguishers.

Quoted message said:

Advanced testing by some of the worlds top cyclists in the tough arena of
the Tour de France means that your Shimanoâ fire extinguisher will work on
the most demanding wind trainer."

Marty

When you see the funny "a" with a hat on, that's meant to be a Registered
symbol. It didn't work to well when I cut and pasted it from the Shimano
website.

Regards

Marty

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

Quoted message said:

When you see the funny "a" with a hat on, that's meant to be a Registered
symbol. It didn't work to well when I cut and pasted it from the Shimano
website.

That's because this is not an Official Shimano Approved Newsgroup.

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

That's strange, because titanium is known for not sparking. I've been
told by an engineer that in combustible-gas applications (like working
around jet fuel tanks) many technicians are required to use either brass
or titanium. He had to buy special titanium crowbars for such an
application (he was working with highly combustible chemical batteries).

Could it be hitting anything else on the drivetrain?

Collin ([email hidden]) wrote:
: almost fast wrote:
:> I was watching the shifts on the trainer and noticed a spark when the
:> chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda
:> cool!
:
: That's strange, because titanium is known for not sparking. I've been
: told by an engineer that in combustible-gas applications (like working
: around jet fuel tanks) many technicians are required to use either
: brass or titanium. He had to buy special titanium crowbars for such an
: application (he was working with highly combustible chemical
: batteries).
:
: Could it be hitting anything else on the drivetrain?

FWIW, titanium golf clubs make sparks when they hit grains of sand.

--
http://rec-sport-golf.com/?rc=oinesroald
Please remove the under_scores if sending me mail.

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

Quoted message said:

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

That's strange, because titanium is known for not sparking. I've been
told by an engineer that in combustible-gas applications (like working
around jet fuel tanks) many technicians are required to use either brass
or titanium. He had to buy special titanium crowbars for such an
application (he was working with highly combustible chemical batteries).

Could it be hitting anything else on the drivetrain?

Actually, titanium is known for giving off big, fat sparks when contacted
hard- so much so that people use ti blocks on the bottom of cars as scrape
plates with the intention of getting just that effect, (now, why would one
want big sparks flying off the bottom of their car? Got me on that one...).
On the other hand, I don't think that all the cogs on a stock 9 are ti.

Not correct - the shower of sparks seen when the bottom of a Formula type
sports car rubs on the pavement is from the titanium rub strips used to
protect the carbon fiber tub.

"Collin" <[email hidden]> wrote in message
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Quoted message said:

almost fast said:

That's strange, because titanium is known for not sparking. >

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

Quoted message said:

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

That's strange, because titanium is known for not sparking. I've been
told by an engineer that in combustible-gas applications (like working
around jet fuel tanks) many technicians are required to use either brass
or titanium. He had to buy special titanium crowbars for such an
application (he was working with highly combustible chemical batteries).

Could it be hitting anything else on the drivetrain?

As I cogitate further on this matter (over a cup of columbias finest, of
course), it occurs to me that using ti as a non-sparking tool may have to do
with the temp. and duration of the spark created. So using ti pucks on a
crotchrocket jockeys knees results in a satisfying fireworks display of
low-temp sparks less likely to ignite vapors than that of some other metals.

Too..much..caffeine..must ride now or risk spontaneous self-combustion..

allen said:

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

Quoted message said:

almost fast said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

That's strange, because titanium is known for not sparking. I've been
told by an engineer that in combustible-gas applications (like working
around jet fuel tanks) many technicians are required to use either brass
or titanium. He had to buy special titanium crowbars for such an
application (he was working with highly combustible chemical batteries).

Could it be hitting anything else on the drivetrain?

As I cogitate further on this matter (over a cup of columbias finest, of
course), it occurs to me that using ti as a non-sparking tool may have to do
with the temp. and duration of the spark created. So using ti pucks on a
crotchrocket jockeys knees results in a satisfying fireworks display of
low-temp sparks less likely to ignite vapors than that of some other metals.

Too..much..caffeine..must ride now or risk spontaneous self-combustion..

It seems I never go the full story on this one. Nevertheless, it would
be cool to have sparking cassette - good for those night rides!

almost fast aka Real Slow said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

Well the sparks didn't come from the titanium. Adjustable and fixed
wrenches, screwdrivers, and other tools used around combustible gas
applications are made of titanium to prevent ignition by sparks.

There is an explanation, but titanium sparking is out.

Jobst Brandt
[email hidden]

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

Quoted message said:

almost fast aka Real Slow said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

Well the sparks didn't come from the titanium. Adjustable and fixed
wrenches, screwdrivers, and other tools used around combustible gas
applications are made of titanium to prevent ignition by sparks.

There is an explanation, but titanium sparking is out.

Jobst Brandt
[email hidden]

Well, actually..

http://www.ccohs.ca/oshanswers/safety_haz/hand_tools/nonsparking.html

seems to have a differing opinion..

Otherwise, somebodies a'gittin ripped off buying these...

http://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/18/208

In fact, it seems possible that using ti cogs in conjunction with an
exceptionally rusty chain could result in an massive discharge, capable of
blowing the rider right off the bike.

(O.K., I made that part up.)

Drat, now I know much more than I intended in the first place-more wasted
memory storage..I'll compensate by forgetting to go to work tomorrow.

Allen None said:

Quoted message said:

Quoted message said:

I was watching the shifts on the trainer and noticed a spark when
the chain snapped past a tooth. Cog is titanium (Dura-Ace
9s). Kinda cool!

Quoted message said:

Quoted message said:

Well the sparks didn't come from the titanium. Adjustable and
fixed wrenches, screwdrivers, and other tools used around
combustible gas applications are made of titanium to prevent
ignition by sparks.

Quoted message said:

Quoted message said:

There is an explanation, but titanium sparking is out.

Quoted message said:

Well, actually..

http://www.ccohs.ca/oshanswers/safety_haz/hand_tools/nonsparking.html

Quoted message said:

seems to have a differing opinion...

They don't say much about titanium on that web site. However, since
hydrogen is used at Stanford Linear Accelerator, they have yellow tint
colored titanium wrenches to connect the stainless steel plumbing. I
think these physicists along with those at other physics laboratories
know that there are benefits in anti-spark tools. Striking them
against each other is not the sound of tool steel on tool steel, but
rather a bit dull.

Quoted message said:

Otherwise, somebodies a'gittin ripped off buying these...

Quoted message said:

http://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/18/208

I suspect that the term titanium is in that product name to give it a
lively spin rather than that the devices are actually titanium. On
the other hand, it seems the sparks must be coming from the pavement
rather than the metal if at all.

Quoted message said:

In fact, it seems possible that using ti cogs in conjunction with an
exceptionally rusty chain could result in an massive discharge,
capable of blowing the rider right off the bike.

I think you should take that up with the manufacturers of these tools
and explain the error of their ways. This is not a new technology.

Jobst Brandt
[email hidden]

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

Quoted message said:

Allen None said:

Quoted message said:

> I was watching the shifts on the trainer and noticed a spark when
> the chain snapped past a tooth. Cog is titanium (Dura-Ace
> 9s). Kinda cool!

Quoted message said:

Quoted message said:

Well the sparks didn't come from the titanium. Adjustable and
fixed wrenches, screwdrivers, and other tools used around
combustible gas applications are made of titanium to prevent
ignition by sparks.

Quoted message said:

Quoted message said:

There is an explanation, but titanium sparking is out.

Quoted message said:

Well, actually..

http://www.ccohs.ca/oshanswers/safety_haz/hand_tools/nonsparking.html

Quoted message said:

seems to have a differing opinion...

They don't say much about titanium on that web site.

They say, " "Non-sparking", "spark-resistant" or "spark-proof" tools are
names given to tools made of metals such as brass, bronze, Monel metal
(copper-nickel alloy), copper-aluminum alloys (aluminum bronze),
copper-beryllium alloys (beryllium bronze), and titanium."

And then go on with, " The name "non-sparking" is misleading because these
tools are capable of producing a spark: the term "reduced-sparking tools"
better describes these tools. "

Quoted message said:

Quoted message said:

Otherwise, somebodies a'gittin ripped off buying these...

Quoted message said:

http://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/18/208

I suspect that the term titanium is in that product name to give it a
lively spin rather than that the devices are actually titanium.

A bit o' reading shows these advertised as being " encased in a shroud of
pure Titanium". Thats one nasty piece of false advertising if you're right.
However, a quick web search shows ti used in similar apps, such as sparkers
for low riders, (weird world isn't it?)

On

Quoted message said:

the other hand, it seems the sparks must be coming from the pavement
rather than the metal if at all.

Well, yes. You see, the reason you need reduced sparking tools in a
volatile environment isn't to stop the dread phenomena of spotaneous
sparkage (as a side note: this was a frequent occurence at Dead shows..),
it's to limit the spark that occurs when objects come into contact, ie, ti
cog plus chain, or knee puck and asphalt. Sooo, since we're not talking
about electrical discharge here, whether the ti cog is tossing out tiny
chunks of his chain, or vise-versa, just as the ti-pucks are flinging off
burning little bits of asphalt, sparkage is done happenin'.

Quoted message said:

I think you should take that up with the manufacturers of these tools
and explain the error of their ways. This is not a new technology.

Perhaps they should actually be selling the tools as "reduced spark"
technology. Maybe its the whole new crusade that could really give Nader a
chance at the presidency this time around. Or..maybe not.

Quoted message said:

Allen None said:

Quoted message said:

>I was watching the shifts on the trainer and noticed a spark when
>the chain snapped past a tooth. Cog is titanium (Dura-Ace
>9s). Kinda cool!

Quoted message said:

Quoted message said:

Well the sparks didn't come from the titanium. Adjustable and
fixed wrenches, screwdrivers, and other tools used around
combustible gas applications are made of titanium to prevent
ignition by sparks.

Quoted message said:

Quoted message said:

There is an explanation, but titanium sparking is out.

Quoted message said:

Well, actually..

http://www.ccohs.ca/oshanswers/safety_haz/hand_tools/nonsparking.html

Quoted message said:

seems to have a differing opinion...

They don't say much about titanium on that web site. However, since
hydrogen is used at Stanford Linear Accelerator, they have yellow tint
colored titanium wrenches to connect the stainless steel plumbing. I
think these physicists along with those at other physics laboratories
know that there are benefits in anti-spark tools. Striking them
against each other is not the sound of tool steel on tool steel, but
rather a bit dull.

Quoted message said:

Otherwise, somebodies a'gittin ripped off buying these...

Quoted message said:

http://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/18/208

I suspect that the term titanium is in that product name to give it a
lively spin rather than that the devices are actually titanium. On
the other hand, it seems the sparks must be coming from the pavement
rather than the metal if at all.

Quoted message said:

In fact, it seems possible that using ti cogs in conjunction with an
exceptionally rusty chain could result in an massive discharge,
capable of blowing the rider right off the bike.

I think you should take that up with the manufacturers of these tools
and explain the error of their ways. This is not a new technology.

Jobst Brandt
[email hidden]

Try Googling "titanium sparks" or some similar search phrase.

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

Quoted message said:

almost fast aka Real Slow said:

I was watching the shifts on the trainer and noticed a spark when the
chain snapped past a tooth. Cog is titanium (Dura-Ace 9s). Kinda cool!

Well the sparks didn't come from the titanium. Adjustable and fixed
wrenches, screwdrivers, and other tools used around combustible gas
applications are made of titanium to prevent ignition by sparks.

There is an explanation, but titanium sparking is out.

Jobst Brandt
[email hidden]

We use non-sparking tools for working with hydrogen but they have a bronze
colour. They're definitely much harder and stronger than bronze. Are you
sure the titanium isn't alloyed with something to take the spark out of it?

Marty