Need a screw

any bike shop, it's a standard part

and incidently that's a bolt

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kington99

Dave

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kington99 said:

and incidently that's a bolt

Apparently not, going by the way my engineer wife keeps correcting me
when I call things bolts...
Apparently if the thread goes all the way up to the head it's a set
screw. If there is a plain shaft with the thread just at the end, it's
a bolt.

Or so I've been told.

But anyway, to stay on topic... yes, they're easy to get from any
decent bike shop.

Rob

Amusing thread title, by the way. Yak yak.

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rob.northcott said:

Amusing thread title, by the way. Yak yak.

Hohohohoho, agreed.

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unicycledood

The.Mars.Volta said:

haha, so young, yet so angry, damn that rap music.

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'Here's a catalog page'
(http://harriscyclery.net/itemdetails.cfm?ID=2473) with what you need.
That is the US name, not necessarily the UK name. I would suggest going
to a bike shop and asking for a self extracting crank bolt with dust
cover and 8mm allen head. They'll have a variety of them for a couple
of bucks US.

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harper

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question: is it your left crank that got unscrewed?

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wobbling bear

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wobbling bear said:

question: is it your left crank that got unscrewed?

Yeah. It dropped off somewhere, the one in the photo is the right screw
with the left crank+pedal.

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Pembar
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harper said:

That is the US name, not necessarily the UK name. I would suggest going
to a bike shop and asking for a self extracting crank bolt with dust
cover and 8mm allen head.

That'll be understood here as well. Everybody calls them bolts anyway,
even if they are technically set screws.

There does seem to be a difference between British and American usage
of "set screw" however. If you Google "set screw", the American
references are for what we would call a "grub screw" (no head).

Just call your thing a crank bolt and you'll be fine.

Rob

Edit: FWIW, I think the one in your picture is a normal allen(or
hex)-headed crank bolt with an integrated plastic dust cap, not a
self-extracting one. The self-extracting ones have a thread on the
(usually metal) dust cap bit that screws into the extractor thread on
the crank, so when you undo the bolt it pushes against the fixed dust
cap and pulls the crank off without having to use a separate puller.
If yours has a thread on the outside of the dust cap bit, it's
self-extracting.

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rob.northcott said:

That'll be understood here as well. Everybody calls them bolts anyway,
even if they are technically set screws.

There does seem to be a difference between British and American usage
of "set screw" however. If you Google "set screw", the American
references are for what we would call a "grub screw" (no head).

Just call your thing a crank bolt and you'll be fine.

Rob

Yeah, I'll need the French translation. lol

I have a set of allen keys, which is what I used to take out the right
screw you see in the picture.

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rob.northcott said:

Edit: FWIW, I think the one in your picture is a normal allen(or
hex)-headed crank bolt with an integrated plastic dust cap, not a
self-extracting one. The self-extracting ones have a thread on the
(usually metal) dust cap bit that screws into the extractor thread on
the crank, so when you undo the bolt it pushes against the fixed dust
cap and pulls the crank off without having to use a separate puller.

You are correct here. I used a normal allen key to remove that
particular screw. I should have taken a more complete picture. I have
no idea how the "self-extracting" ones look like. =/

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Wait, I'm confused now.

"Self-extracting" refers to the tool or the screw/bolt? Cos' the link
harper showed is the exact same thing which I'm lacking on my left
crank.

I went to a unicycle shop where I am and they couldn't find a screw of
the correct length (correct size though). I'll try a bike shop as
suggested.

--
Pembar
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Even better is to take the one you have into the bike shop and say,
"give me one of these." 'Here's one of the standard types.'
(http://tinyurl.com/3nh8n6)

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harper

-Greg Harper

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[censored]. I see it every day. It sucks." - SqueakyOnion
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You can find one on most street corners after 8pm.

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thejdw

I didn't spell it wrong, you just read it wrong!
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Pembar said:

Wait, I'm confused now.

"Self-extracting" refers to the tool or the screw/bolt? Cos' the link
harper showed is the exact same thing which I'm lacking on my left
crank.

A self extracting bolt is one that is designed to pull the crank off as
it is undone, thus negating the need for a crank puller tool. It
comprises a bolt and a seperate threaded ring. The bolt goes in first
as normal, then the ring screws in to the crank. WHen the bolt is
undone, it preses on the inside of the ring, pulling the crank off as
it unscrews.

But the one you pictured isn't self extracting, it just has a black
plastic dust cap.

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kington99

Dave

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Wow, never saw those self-extracting bolts (/set screws) before. They
look like they could be really handy in times when you have to switch
back and forth. Too bad my Coker doesn't use bolts. I almost ordered a
pair from that catalog, but the shipping was $9.50 for the $15 item.
I'll find them somewhere closer...

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johnfoss

John Foss
Email: "jfoss" at "unicycling.com" -- www.unicycling.com
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johnfoss said:

Wow, never saw those self-extracting bolts (/set screws) before. They
look like they could be really handy in times when you have to switch
back and forth.

They were standard issue on the KH/Onza cranks. Two issues with them:

1. the rings come undone and fall out unexpectedly sometime
2.doing up the rings to ensure they dont come lose and fall out
requires a special tool that will fit in the two small holes. A pair of
circlip pliers can be used, but not ideal.

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kington99

Dave

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I went to a few bicycle shops the past week, some had the screw, some
didn't.

BUT

The screw is the wrong length, the ones at the bicycle shops is
longer.

Any ideas? Other than cutting it? (Which is rather difficult where I
am)

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Pembar said:

I went to a few bicycle shops the past week, some had the screw, some
didn't.

BUT

The screw is the wrong length, the ones at the bicycle shops is
longer.

Any ideas? Other than cutting it? (Which is rather difficult where I
am)

were they actually bottoming out in the hub thread, or just longer than
the bolt you have currently?

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kington99

Dave

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