Bearings

Are there any plain bearings in a bicycle?

--
joy beeson at comcast dot net
http://wlweather.net/PAGEJOY/
The above message is a Usenet post.
I don't recall having given anyone permission to use it on a Web site.

On 7/21/2015 10:39 AM, Joy Beeson wrote:
Are there any plain bearings in a bicycle?


Did you mean besides chain? That's the most significant example.

Some nylon-sleeved journals on 'wheel goods' (that is to say
one step below a bicycle) for very young children.

Even the bottom end of XMart adult bicycles have ball
bearings for the major load-bearing parts; pedals, hubs,
headset and cranks[1].

There was a guy in Oklahoma, TefSeal, who made a 3/16" PTFE
torus to replace the balls in a worn out Campagnolo Record
headset. Good idea, nicely made, worked well, didn't sell. I
can't readily recall another example.

[1]
Bronze sleeve on steel journals include GranSport/Record/NR,
Svelto and Zeus derailleur bodies, cantilever and linear
brakes, Campagnolo pre-1996 Ergo.

Nylon sleeves on steel or aluminum are extremely common.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On 7/21/2015 1:23 PM, AMuzi wrote:
On 7/21/2015 10:39 AM, Joy Beeson wrote:
Are there any plain bearings in a bicycle?


Did you mean besides chain? That's the most significant example.

Some nylon-sleeved journals on 'wheel goods' (that is to say one step
below a bicycle) for very young children.

Even the bottom end of XMart adult bicycles have ball bearings for the
major load-bearing parts; pedals, hubs, headset and cranks[1].

There was a guy in Oklahoma, TefSeal, who made a 3/16" PTFE torus to
replace the balls in a worn out Campagnolo Record headset. Good idea,
nicely made, worked well, didn't sell. I can't readily recall another
example.

[1]
Bronze sleeve on steel journals include GranSport/Record/NR, Svelto and
Zeus derailleur bodies, cantilever and linear brakes, Campagnolo
pre-1996 Ergo.

Nylon sleeves on steel or aluminum are extremely common.

ISTR some early-1970s bottom line Raleighs coming with plain bearing
pedals. I think that design choice didn't last long.

--
- Frank Krygowski

On Tue, 21 Jul 2015 12:39:51 -0300, Joy Beeson
wrote:

Are there any plain bearings in a bicycle?

Sure. Here's a video advertisement for IGUS, which makes polymer
(plastic) bushings and plain bearing with illustrations as to their
locations on a bicycle:
https://www.youtube.com/watch?v=rWNoXlzqqpQ (1:18)
and the associated web pages:
http://www.igus.eu/wpck/8178/App_iglidur_Mountainbikes
http://www.igus.com/wpck/9797/why_plastic_bearings_outperform_metal
The hinges in folding bicycles are also bushings and plain bearings.

The big advantages are that plastic bushings and bearings can be made
maintenance free and don't have any cavities that can trap water and
filth. They're also cheaper than roller and ball bearings. some
types of bearings simply can't be (easily) built without plastic
bushings, such as the ball pivot on bicycles without steering bars or
rudders. Just about everything else about them is inferior to roller
and ball bearings.

Why do you ask? (I'm being nosey).



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Frank Krygowski writes:

On 7/21/2015 1:23 PM, AMuzi wrote:
On 7/21/2015 10:39 AM, Joy Beeson wrote:
Are there any plain bearings in a bicycle?


Did you mean besides chain? That's the most significant example.

Some nylon-sleeved journals on 'wheel goods' (that is to say one step
below a bicycle) for very young children.

Even the bottom end of XMart adult bicycles have ball bearings for the
major load-bearing parts; pedals, hubs, headset and cranks[1].

There was a guy in Oklahoma, TefSeal, who made a 3/16" PTFE torus to
replace the balls in a worn out Campagnolo Record headset. Good idea,
nicely made, worked well, didn't sell. I can't readily recall another
example.

[1]
Bronze sleeve on steel journals include GranSport/Record/NR, Svelto and
Zeus derailleur bodies, cantilever and linear brakes, Campagnolo
pre-1996 Ergo.

Nylon sleeves on steel or aluminum are extremely common.

ISTR some early-1970s bottom line Raleighs coming with plain bearing
pedals. I think that design choice didn't last long.

Many (most?) rear derailleur jockey wheels revolve on plain bushings.


--

On Tuesday, July 21, 2015 at 6:23:30 PM UTC+1, AMuzi wrote:

Nylon sleeves on steel or aluminum are extremely common.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

I had a Nordic air walker with plain bearings, mild steel to mild steel. I wore it out in a couple of months. It was from a mailorder firm called Oxendales, a piece of utter crap, probably intended for their fat customers who would use it once and then park it in the garage. Having learned my lesson, to replace it I bought a proper York treadmill, which has served very well -- but, Jesus, is it ever huge and heavy, even for a semi-pro model .

The punchline of the story is that, after I trashed the air walker, my physio found out about it and was horrified. Apparently those things are BAD because they bring your heart rate up too fast.

Andre Jute

On Tuesday, July 21, 2015 at 3:00:19 PM UTC-4, Jeff Liebermann wrote:
On Tue, 21 Jul 2015 12:39:51 -0300, Joy Beeson
wrote:

Are there any plain bearings in a bicycle?

Sure. Here's a video advertisement for IGUS, which makes polymer
(plastic) bushings and plain bearing with illustrations as to their
locations on a bicycle:
https://www.youtube.com/watch?v=rWNoXlzqqpQ (1:18)
and the associated web pages:
http://www.igus.eu/wpck/8178/App_iglidur_Mountainbikes
http://www.igus.com/wpck/9797/why_plastic_bearings_outperform_metal
The hinges in folding bicycles are also bushings and plain bearings.

The big advantages are that plastic bushings and bearings can be made
maintenance free and don't have any cavities that can trap water and
filth. They're also cheaper than roller and ball bearings. some
types of bearings simply can't be (easily) built without plastic
bushings, such as the ball pivot on bicycles without steering bars or
rudders. Just about everything else about them is inferior to roller
and ball bearings.

Why do you ask? (I'm being nosey).



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

~~~~~~~~~~~~~~~~~~~~~~~

EQ ?

On Tuesday, July 21, 2015 at 5:50:15 PM UTC-4, Andre Jute wrote:
On Tuesday, July 21, 2015 at 6:23:30 PM UTC+1, AMuzi wrote:

Nylon sleeves on steel or aluminum are extremely common.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

I had a Nordic air walker with plain bearings, mild steel to mild steel. I wore it out in a couple of months. It was from a mailorder firm called Oxendales, a piece of utter crap, probably intended for their fat customers who would use it once and then park it in the garage. Having learned my lesson, to replace it I bought a proper York treadmill, which has served very well -- but, Jesus, is it ever huge and heavy, even for a semi-pro model .

The punchline of the story is that, after I trashed the air walker, my physio found out about it and was horrified. Apparently those things are BAD because they bring your heart rate up too fast.

Andre Jute

q q q q q q q

you could try swimming ?


https://www.google.com/#q=pouring%20...Ayoutube.co m

On Tuesday, July 21, 2015 at 1:23:30 PM UTC-4, AMuzi wrote:
On 7/21/2015 10:39 AM, Joy Beeson wrote:
Are there any plain bearings in a bicycle?


Did you mean besides chain? That's the most significant example.

Some nylon-sleeved journals on 'wheel goods' (that is to say
one step below a bicycle) for very young children.

Even the bottom end of XMart adult bicycles have ball
bearings for the major load-bearing parts; pedals, hubs,
headset and cranks[1].

There was a guy in Oklahoma, TefSeal, who made a 3/16" PTFE
torus to replace the balls in a worn out Campagnolo Record
headset. Good idea, nicely made, worked well, didn't sell. I
can't readily recall another example.

[1]
Bronze sleeve on steel journals include GranSport/Record/NR,
Svelto and Zeus derailleur bodies, cantilever and linear
brakes, Campagnolo pre-1996 Ergo.

Nylon sleeves on steel or aluminum are extremely common.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

00 00 00 000 00 00

can you believe it ? someone gave Nate a bicycle !!!!!!!!!!!!!!!!!!

On 22/07/15 01:39, Joy Beeson wrote:
Are there any plain bearings in a bicycle?


Yes. Jockey wheels use them. There are also plain bearings in brake and
gear levers, brake callipers and deraileur pivots. Clipless pedals
usually include a plain bearing in the clip mechanism.

After market jockey wheels with press fit cartridge ball bearings are
available also.

--
JS