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-   -   brake boss miters to CL (http://www.bikeforums.net/framebuilders/713199-brake-boss-miters-cl.html)

stanridgespeed 02-12-11 07:29 PM

brake boss miters to CL
 
hello gents, a couple questions: I'm planning on working with bosses. 3/4, 5/8 and 1 inch. are for which applications respectively? I'm planning on ordering from paragon. building the fork with 28/20. the rear stays are nothing special/same ol' same ol' .

what would be the downside of brazing bosses on for "future" use.. if they're ss with screw out studs shouldn't matter right? other than looks.... ?

does anyone have any photos of boss jigs you've made?

thanks fellas,
adam

Live Wire 02-12-11 08:29 PM

Unused bosses are kinda ugly, but that an "eye of the beholder" thing.
The 3/4 and 1" bosses are for forks and the 5/8 are for seatstays.
It's best to get the unmitered bosses for a fork. Because, if you're building with a cast fork crown, 80mm usually falls just outside of the blade centers...meaning you'll have to file the bosses to fit and too much filing on the mitered bosses will make them too short for the studs to fit.
My first boss jig was a flat piece of steel (a guide from a chainsaw file actually) with a slot and I bolted the bosses to that.
Then I found an even simpler and slicker solution from Dave Kirk:
http://www.velocipedesalon.com/forum...-tools-cb2-jpg
yeah, he rocks.
Thanks for this one Dave!

fietsbob 02-12-11 09:19 PM

For a jig , i made a strip of flat bar , drilled a bunch of holes in it, the last 2 I turned into a slot, so the width is adjustable ..
It, being flat, kept the bosses parallel to each other,
when I brazed them on the tubes were sitting horizontal.

sannerbikes700 02-12-11 10:25 PM

+1 for the strip with a hole and slot. I've got a Henry James brake boss jig, and really never use it, because the strip does the trick.

Live Wire did you post a link for Dave Kirk's solution? I'm not seeing it.

Live Wire 02-13-11 09:26 AM

Quote:

Originally Posted by sannerbikes700 (Post 12217017)
+1 for the strip with a hole and slot. I've got a Henry James brake boss jig, and really never use it, because the strip does the trick.

Live Wire did you post a link for Dave Kirk's solution? I'm not seeing it.

No link, it's the picture I posted of the jig made out of square tubing. With a nice slip fit and holes the right diameter that just barely fit the posts, that jig is a lot easier and faster to use than the flat strip and bolt kind.
I had an HJ jig too, very nicely made and useful as an alignment checker, but I sold it because my homemade jig worked so well.

Scooper 02-13-11 09:58 AM

Quote:

Originally Posted by Live Wire (Post 12218054)
No link, it's the picture I posted of the jig made out of square tubing. With a nice slip fit and holes the right diameter that just barely fit the posts, that jig is a lot easier and faster to use than the flat strip and bolt kind.
I had an HJ jig too, very nicely made and useful as an alignment checker, but I sold it because my homemade jig worked so well.

It's a "red X" for me, and when I copy and paste the "properties URL" http://www.velocipedesalon.com/forum...-tools-cb2-jpg I get a Velocipede Salon web page with this message:

You are not logged in or you do not have permission to access this page. This could be due to one of several reasons:

1.You are not logged in. Fill in the form at the bottom of this page and try again.
2.You may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
3.If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.


I guess you have to be a logged on Velocipede Salon member to see it.

stanridgespeed 02-13-11 11:34 AM

thanks gents. i saw the photo, i'm also a member of the other forum..maybe why i can see?

Has anyone used the paragon bosses? Is there a downside to using bosses in conjunction with short reach caliper? will there be issues? These questions may seem elementary, sorry.

Ive been tasked with this and dont want to destroy margin with return shipping, wasted labor..etc. thanks guys!

unterhausen 02-13-11 02:21 PM

yes, you have to be logged in to that forum to see pictures. Seems to me that a caliper is going to be awfully close to any boss.

Live Wire 02-13-11 07:46 PM

1 Attachment(s)
OK, I thought if I could see the pic everybody could...oops.
No idea why it did that but for everyone else I got one of the "in progress" frames in the shop and shot a pic for ya:
http://bikeforums.net/attachment.php...hmentid=189863

Dave Kirk 02-13-11 07:52 PM

Quote:

Originally Posted by Live Wire (Post 12220535)
OK, I thought if I could see the pic everybody could...oops.
No idea why it did that but for everyone else I got one of the "in progress" frames in the shop and shot a pic for ya:
http://bikeforums.net/attachment.php...hmentid=189863

Nice work - simple is good.

dave

stanridgespeed 02-15-11 08:08 PM

thanks everyone! we've nixed the idea of going both routes. Classic case of I want one that does everything.


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