v-brake stud threads

numbnutz numbnutz said:

Quoted message said:

I'll bet it's listed in Sutherland's. I couldn't find on the Harris
Cyclery site:
http://www.sheldonbrown.com/cantilever-geometry.html
http://www.sheldonbrown.com/canti-direct.html

That was the first place I looked- then Park tools, then about 100
other sites. No luck yet.

Did you check the archive of the frame builders list at www.phred.org?

numbnutz said:

Sheldon Brown said:

numbnutz said:

Can anyone tell me what thread specs are for v-brake studs?

These are regular M6 threads, like most threads on bicycle brakes (6 x 1 mm)

Sheldon "M6" Brown

I don't mean the bolt that goes into the boss to mount the brake. I
mean the threads on the boss that screws into the bike frame. My
caliper says the threaded part is 7.9mm dia. so I assume it is an 8mm
screw, but I can't tell what the thread pitch is, only that it is
clearly greater than 1 mm.

Hi, Tyler!

OK- that thread's somewhat specific to the bike. The QBP catalog lists
two different thread diameters and two different thread lengths:
http://harriscyclery.net/site/page.cfm?PageID=49&Category=286&Brand=247&type=T
(scroll to the bottom of the page)

It sounds like you've got a 8mm x 1.25mm thread- but there is no
"standard" for this, as far as I know.

Jeff

Quoted message said:

Maybe I'm not calling the part by the right name. I need to know the
thread specs on the post/pivot that screws into the bike frame. The
v-brake then screws into the post/pivot. There are also three little
holes for the brake spring adjuster to drop into. I'd like some idea
of what the proper angle between them is, and how far they should be
from the center of the pivot/post/boss thingy.

Thanks!

I unscrewed one of the bosses/pivots from my old Cannoldale DD50 fork
and took it to the hardware store and guess what I discovered?

The threads are 5/16 x 18 tpi.

I would have expected metric threads because everything else on brake
is metric (or am I just used to dealing with Shimano?).

pfffft!

numbnutz said:

I unscrewed one of the bosses/pivots from my old Cannoldale DD50 fork
and took it to the hardware store and guess what I discovered?

The threads are 5/16 x 18 tpi.

I would have expected metric threads because everything else on brake
is metric (or am I just used to dealing with Shimano?).

pfffft!

What, you're playing with bikes and you're expecting things to be
standardized?? Ack! Thppft...

Jeff

JeffWills said:

numbnutz said:

I unscrewed one of the bosses/pivots from my old Cannoldale DD50 fork
and took it to the hardware store and guess what I discovered?

The threads are 5/16 x 18 tpi.

I would have expected metric threads because everything else on brake
is metric (or am I just used to dealing with Shimano?).

pfffft!

What, you're playing with bikes and you're expecting things to be
standardized?? Ack! Thppft...

205(mm)/50(%)/17(in)

Now who thought up of that one and plastered it all over the world???

--
Phil, Squid-in-Training

numbnutz said:

I unscrewed one of the bosses/pivots from my old Cannoldale DD50 fork
and took it to the hardware store and guess what I discovered?

The threads are 5/16 x 18 tpi.

I would have expected metric threads because everything else on brake
is metric (or am I just used to dealing with Shimano?).

I've had to make some similarly mixed threaded components before. I
can easily buy metric taps, but I can't convince the threading gears on
most lathes to acknowledge the benefits of the metric system. They are
incorrigibly set in their "ways", heh.

Chalo Colina