Quoted message said:Quoted message said:On Thu, 15 Jun 2006 17:22:25 GMT, Jasper Janssen <[email hidden]>
Quoted message said:On Wed, 14 Jun 2006 11:48:01 -0600, [email hidden] wrote:
>On 14 Jun 2006 05:55:00 -0700, [email hidden] wrote:
>
>>Hi,
>>
>>Someone at www.oldroads.com asked recently who or what HR Pattern
>>is/was as seen on a number of hubs.
>>
>>Lo and behold I was cleaning the front hub of my BSA the other day and
>>the legend "hr pattern" did appear.
>>
>>Anyone know what this is?
>>
>>A manufacturer?
>>
>>A Standard?
>Possibly intended for a half-radial spoke pattern?
>
>http://www.sheldonbrown.com/wheelbuild.html#half-radial
On old roadsters? I don't buy that. Halfradial doesn't really become even
an option until fairly recently, with hugely dished rear wheels.
Jasper
Dear Jasper,
The original post mentioned that the same HR was found on a BSA
motorcycle front wheel, while Sheldon's article mentions that the
pattern was used on Ford Model A's.
Cheers,
Carl Fogel
Looking further, I found "HR pattern"
. . . in British railway lamp auctions, probably an abbreviation for
some famous railway (GWR is Great Western Railway to the railroad
folk)
. . . in some kind of sheet metal statistics, but I couldn't find what
it meant ("hot-rolled" led nowhere)
. . . and in all sorts of useless heart-rate links.
HR might also stand for "half-round pattern" (the profile of a hub),
for "Hub Rear Pattern" on the bicycle (but obviously not the front
wheel of the BSA--unless BSA was being cavalier), or some company's
name ("Holmes-Rathbone pattern"😉.
Here's the inquiry that the original poster refers to:
"Can anyone ID the hubs that are stamped "HR Pattern, Made in England.
I keep running across them."
--Warren
"Nope."
"But a couple of days after first reading this, I looked at the front
hub of my "BSA" guess what I found?"
--Chris Holmes
http://oldroads.com/d_eng_ra.asp?OQID=20465&QuestionNum=20465&RID=0
"Half-radial pattern" doesn't sound too likely to me, either, but
neither do the other possibilities. I'm still puzzled.
Cheers,
Carl Fogel
The "HR pattern, made in England" on the bike and BSA hubs might
somehow relate to what's called the BSA threading of 1.370" and 24 tpi
for hubs:
"Miche Hubs and cog-carriers use Italien threading which is 35mm*24tpi
(1.378 inch), while Shimano, Formula, Suzue, Phil, etc. use BSA
threading 1.370"*24tpi - which translates to 34.798mm*24tpi. Also, and
i hope i'm using the correct english terms here, the thread angle on a
BSA thread is 60 degrees, radius 0.17mm, while on ITA it's 55deg and
0.14mm."
"These differences are tiny, and as you said, an italian threaded cog
(Miche or Campy) will thread on a regular BSA hub, but as you can see
the italian thread diameter is slightly larger than BSA. This reduces
the contact area, and could very well increase the risk of a stripped
hub."
http://www.fixedgeargallery.com/reviews/hubreview/miche
CF