Stem binder bolt threading?
11-18-18, 04:32 PM
#1
Senior Member
Thread Starter
Join Date: Apr 2006
Location: Washington County, Vermont, USA
Posts: 3,776
Bikes: 1966 Dawes Double Blue, 1976 Raleigh Gran Sport, 1975 Raleigh Sprite 27, 1980 Univega Viva Sport, 1971 Gitane Tour de France, 1984 Lotus Classique, 1976 Motobecane Grand Record
Mentioned: 77 Post(s)
Tagged: 0 Thread(s)
Quoted: 764 Post(s)
Liked 656 Times
in
348 Posts
Stem binder bolt threading?
Does anyone know what the threading on a typical modern-ish stem binder bolt is? I just measured a Nitto Technomic and the unthreaded portion of the bolt seems to be about 7mm, while the major diameter of the threaded portion is about 8mm. Presumably the bolt has rolled threads, since their diameter is greater than that of the shank. Not clear to me whether the threading itself is a standard M8 threading, since I don't have a bolt of that size on hand, or a thread gauge.
I have a reason for wanting to know this but will not bother to explain, partly to save time and partly so no one will try to talk me out of the project I'm contemplating.
I have a reason for wanting to know this but will not bother to explain, partly to save time and partly so no one will try to talk me out of the project I'm contemplating.
__________________
www.redclovercomponents.com
"Progress might have been all right once, but it has gone on too long."
--Ogden Nash
www.redclovercomponents.com
"Progress might have been all right once, but it has gone on too long."
--Ogden Nash
Last edited by jonwvara; 11-18-18 at 05:05 PM.
11-18-18, 05:01 PM
#2
Banned
try & see..
Yes you are describing a rolled thread , spokes are rolled threads..
thread rollers press down, making the groove valleys,
and displacing metal up , in pushing metal up, forming the peaks.
in the case of the stem quill bolt,
The steel was probably next, heat treated, then chrome plated..
Probably M8..
...
thread rollers press down, making the groove valleys,
and displacing metal up , in pushing metal up, forming the peaks.
in the case of the stem quill bolt,
The steel was probably next, heat treated, then chrome plated..
Probably M8..
...
11-19-18, 02:08 PM
#3
Senior Member
Join Date: Nov 2004
Posts: 23,223
Mentioned: 654 Post(s)
Tagged: 1 Thread(s)
Quoted: 4722 Post(s)
Likes: 0
Liked 3,036 Times
in
1,874 Posts
My Technomic's bolt is M8 x 1.25, verified with thread die and thread pitch gauge.
11-19-18, 07:31 PM
#4
Senior Member
Thread Starter
Join Date: Apr 2006
Location: Washington County, Vermont, USA
Posts: 3,776
Bikes: 1966 Dawes Double Blue, 1976 Raleigh Gran Sport, 1975 Raleigh Sprite 27, 1980 Univega Viva Sport, 1971 Gitane Tour de France, 1984 Lotus Classique, 1976 Motobecane Grand Record
Mentioned: 77 Post(s)
Tagged: 0 Thread(s)
Quoted: 764 Post(s)
Liked 656 Times
in
348 Posts
Thanks!
__________________
www.redclovercomponents.com
"Progress might have been all right once, but it has gone on too long."
--Ogden Nash
www.redclovercomponents.com
"Progress might have been all right once, but it has gone on too long."
--Ogden Nash
Thread
Thread Starter
Forum
Replies
Last Post
pisces8113
Bicycle Mechanics
2
03-06-15 10:08 AM
skg
Bicycle Mechanics
14
08-29-10 04:08 PM
