Sturmey Archer dynohub GH6 orientation
John Thurston
electricity! I'd like to put it on my Lenton Sport and remove the
Bosch bottle generator.
I am assuming that, like other front Sturmey hubs, there is a prefered
orientation in the fork to prevent the cones from tightening up.
Before I go and install it backassward, could someone tell me on which
side of the bike the alternator should be?
John Thurston
Juneau, Alaska
A Muzi
news:60f5d391.0209...@posting.google.com...
Good question!
The Raleigh front steel hubs with no locknuts have a right cone "fixed" (or
it should be. . . ) to the stub inside the axle and the adjustable one goes
on the left. That's so the cone loosens against the fork tip (and it cannot
move in that direction) instead of auto-tightening into a faceplant.
GH6 on the other hand _do_ have locknuts so they can work either way. The
catalog photo of my 1953 shows the terminals on the right and a 1949 I
cleaned up came with them on the right. When I sold GH6 Raleighs new (1970s
and early eighties) thay came out of the box on the left and catalogs of
that era show them left.
So. . . I guess either way is OK!
--
Andrew Muzi
http://www.yellowjersey.org
Open every day since 1 April 1971
Bill Putnam
> "John Thurston" <john_t...@my-deja.com> wrote in message
> news:60f5d391.0209...@posting.google.com...
> > John Thurston
> > Juneau, Alaska
>
....> GH6 on the other hand _do_ have locknuts so they can work either
way. The
> catalog photo of my 1953 shows the terminals on the right and a 1949 I
> cleaned up came with them on the right. When I sold GH6 Raleighs new (1970s
> and early eighties) thay came out of the box on the left and catalogs of
> that era show them left.
>
> So. . . I guess either way is OK!
Note that the Sturmey Dynohub requires a bulb of smaller wattage than
the standard 6 Volt 3 Watt generator bulbs. A modern halogen bulb
well suited to the Dynohub can be purchased on line at
http://www.reflectalite.com/index.html
The bulb is their GH107. They accept PayPal, so payment is easy.
Bill Putnam
Jim Adney
Thurston) wrote:
>I am assuming that, like other front Sturmey hubs, there is a prefered
>orientation in the fork to prevent the cones from tightening up.
>Before I go and install it backassward, could someone tell me on which
>side of the bike the alternator should be?
Mount it with the terminals on the left side of the bike.
-
-----------------------------------------------
Jim Adney jad...@vwtype3.org
Madison, Wisconsin USA
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jobst....@stanfordalumni.org
>> I am assuming that, like other front Sturmey hubs, there is a
>> prefered orientation in the fork to prevent the cones from
>> tightening up. Before I go and install it backassward, could
>> someone tell me on which side of the bike the alternator should be?
> Mount it with the terminals on the left side of the bike.
Why? It's an AC device that runs equally well in either direction.
If you are used to having your QR on the left then the dyno should go
on the right... if you get the axle drilled for a standard QR.
Jobst Brandt <jobst....@stanfordalumni.org> Palo Alto CA
Sheldon Brown
>>>prefered orientation in the fork to prevent the cones from
>>>tightening up. Before I go and install it backassward, could
>>>someone tell me on which side of the bike the alternator should be?
Jim Adney prescribed:
>>Mount it with the terminals on the left side of the bike.
Jobst Brandt asked:
> Why? It's an AC device that runs equally well in either direction.
> If you are used to having your QR on the left then the dyno should go
> on the right... if you get the axle drilled for a standard QR.
This is a mechanical issue, not an electrical one.
The standard front hubs on most Nottingham Raleighs were, in fact
directional, due to the lack of cone locknuts.
The right "fixed" cone has no wrench flats, and is screwed down tight
against a shoulder on the axle. The shoulder prevents the cone from
tighening itself further due to wheel rotation.
The left "adjusting" cone does have wrench flats. As long as the left
axle nut is tight, the left cone cannot unscrew itself due to wheel
rotation.
If one of these wheels in installed incorrectly, with the adjusting cone
on the wrong (right) side, it is possible for the adjustable cone to
tighten itself up, causing serious hub damage.
I believe that some earlier model Dyno-Hubs had similiar issues, but
those most commonly encountered use conventional locknuts and don't
really care which way they go in.
Many older British bikes had headlights mounted to special braze-ons on
the right fork blade. I would think it would make most sense for such
an installation to have the armature on the right side so as to avoid
tbe necessity of running wires up and over the fork crown. Thus, I
suspect that the default setting would place the armature on the right side.
Shimano generator hubs have a label with a prominent arrow that
indicates their preferred direction of rotation, but I don't know the
reason for this. They want the terminals on the right.
Sheldon "Orientation Matters" Brown
+-----------------------------------------------+
| A government that robs Peter to pay Paul |
| can always depend upon the support of Paul. |
| --George Bernard Shaw |
+-----------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772, 617-244-1040 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com
Jim Adney
wrote:
>Mount it with the terminals on the left side of the bike.
I'll yield to Andy' better response. If the axle has locknuts mount it
either way.
tubus import en framebouw
>
> Shimano generator hubs have a label with a prominent arrow that
> indicates their preferred direction of rotation, but I don't know the
> reason for this. They want the terminals on the right.
This is usual with current hubdynamo's
reasons: 1) this prevents the hub from unscrewing itself
2) This leaves room on the left side for rollerbrakes, diskbrakes etc
--
Marten
alex wetmore
news:3D93B96D...@sheldonbrown.com:
> indicates their preferred direction of rotation, but I don't know the
> reason for this. They want the terminals on the right.
Shimano generator hubs have the whole generator assembled threaded into the
hub shell. If put into the frame backwards then there is some potential for
it to unscrew itself. They have an specified orientation for the same reason
that cranks and bottom brackets do.
http://www.shimano-europe.com/cycling/phpimages/product/exp_view/HB_NX30.pdf
shows how the hub comes apart. There are huge wrench flats on the right for
disassembling it.
Newer Schmidt SON hubs have the same requirements, although the older ones
didn't care which side they were on.
I prefer left side terminals myself. My light is usually mounted halfway up
the left fork blade and left side terminals result in simpler and shorter
wiring.
alex