Old Atom Freewhweel - cone RH or LH threads?

Bob said:

I thought these were all RH thread, but it's been a long time and this
one seems awful tight. Were there many freewheels with LH threads on
the cone ?

Yes, all of them AFAIK. I dismantled one once as an intellectual
exercise.

Incidentally, it did all go back together and still works, although I
don't use it any more as I don't have a 5 speed bike. I left one of the
shims out during reassembly, which got rid of most of the wobble.

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

I thought these were all RH thread, but it's been a long time and this
one seems awful tight. Were there many freewheels with LH threads on
the cone ?

Shimano freewheel cones have LH threads. Ditto with freehubs.

One of my precious Dura-Ace 7-speed freewheels was tight a few weeks back.
Normally I treat freewheels as throw-aways, but these are special. I
pulled it apart and added a shim. Good as new.

Bob said:

I thought these were all RH thread, but it's been a long time and this
one seems awful tight. Were there many freewheels with LH threads on
the cone ?

Think about it. What would happen if the cone was threaded the other
way?

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Werehatrack said:

Quoted message said:

I thought these were all RH thread, but it's been a long time and this
one seems awful tight. Were there many freewheels with LH threads on
the cone ?

Think about it. What would happen if the cone was threaded the other
way?

If it's a RH thread then it tightens against the shims until it can't
get any tighter. Not bad if it is set up with the correct spacing. If
it's LH it tends to loosen. Not good. But, results so far seem to
indicate that LH is normal.

Zog The Undeniable said:

Bob said:

I thought these were all RH thread, but it's been a long time and this
one seems awful tight. Were there many freewheels with LH threads on
the cone ?

Yes, all of them AFAIK. I dismantled one once as an intellectual exercise.

All freewheels or all ATOMs? Every Shimano and SunTour I've ever
rebuilt were left-hand thread cones. I'm surprised to hear there are
exceptions to the *left-hand* rule.

Mark

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

Werehatrack said:

Quoted message said:

I thought these were all RH thread, but it's been a long time and this
one seems awful tight. Were there many freewheels with LH threads on
the cone ?

Think about it. What would happen if the cone was threaded the other
way?

If it's a RH thread then it tightens against the shims until it can't
get any tighter. Not bad if it is set up with the correct spacing. If
it's LH it tends to loosen. Not good. But, results so far seem to
indicate that LH is normal.

It depends on which side of the cog the flange is placed.

Everest freewheels, for instance, have a flange in the middle of the body;
the cogs outboard are threaded RH, those inboard are LH. Normal pedalling
action tightens both.

jtaylor said:

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

Werehatrack said:

>I thought these were all RH thread, but it's been a long time and this
>one seems awful tight. Were there many freewheels with LH threads on
>the cone ?

Think about it. What would happen if the cone was threaded the other
way?

If it's a RH thread then it tightens against the shims until it can't
get any tighter. Not bad if it is set up with the correct spacing. If
it's LH it tends to loosen. Not good. But, results so far seem to
indicate that LH is normal.

It depends on which side of the cog the flange is placed.

Everest freewheels, for instance, have a flange in the middle of the body;
the cogs outboard are threaded RH, those inboard are LH. Normal pedalling
action tightens both.

The discussion is not about cogs, but rather about the screw-on
coverplate that holds the bearings in (really a bearing "cone", but it
seems odd to call it that).

I think all coverplates are on the outboard side of the freewheel.

Mark

Bob said:

If it's a RH thread then it tightens against the shims until it can't
get any tighter. Not bad if it is set up with the correct spacing. If
it's LH it tends to loosen. Not good. But, results so far seem to
indicate that LH is normal.

Precession. Just like pedals.

Jasper