Subject: RE: Gen bracket hole depth
Author: Kevin Graf
Date: Nov 5, 2003, 6:05 AM
Post ID: 1715111417
Hey man,
Yeah, she's probably forgotten me by now, sitting there in the corner,
collecting dust.
Did all that already, the dowel is a good fit, I will take another look at
it though, If it's at all shot I will take you up on the dowel. I did fill
the whole area where the bracket sits, came out pretty damn good.
Like I said, I was gonna go with helicoil, decided to try the time-serts,I
was thinking that the gen. mount studs could be bolted into something harder
than aluminum, granted the helicoil would give extra ummph but the time-sert
seemed as though it would disperse the load even more seeing as how the OD
is a bit bigger. we'll find out seeing as though the holes for the timesert
are already drilled. I just need to know a depth. I stopped at .420". I
would go a bit deeper if I could, just not sure if that's a oil channel or
just webbing running along the top of the engine.
Did you, have you gone to the shop breakfast? Chris told me about it but, I
work very late 3-4am on Fri & Sat nights, so I might be hard pressed to get
there.
Kev
-----Original Message-----
From: Jesse Open [mailto:Beaver-@comcast.net]
Sent: Tuesday, November 04, 2003 7:49 PM
To: Loopfram-@topica.com
Subject: RE: Gen braket hole depth
Hello Kevin,
Saw the poor ,sorry bike just the other day . The fellow who owns that
yellow 1974 Ducati 750 is a pretty swell lawyer/biker . He may be able
to refer you .
As for the generator base : there are a number of items that all
contribute to sucess . The little locator dowel must FIT tightly into
the hole in the case and securely into the threads in the generator . I
make up oversize locators and ream the hole for a good fit . The waffled
area the bracket sits upon lacks sufficient area to support the load . I
like to fill the area with metal filled Devcon or similar . Use STUDS so
you can get full thread engagement . Use a large ,hard steel plate
between the bracket and nuts to spread the clamping force . Also of
coarse avoid fine threads in the soft material . The Timeserts are a bit
large on the OD and Helicoils allow thicker walls to remain abit of a
trade off . Also the Helicoils give more flexibility in length .
You can call me if you want come over and use the lathe etc. I'll be
glad to give you a hand out here in Utica .
Kevin Graf wrote:
Hey all, Yup, yup, long time no hear. still fighting the ins. co. over the Ambo. can you believe it? I think it might be time for a letter from our lawyer friend, heard that works. Anyways, Among the other million and one things happening, I have an Eldo engine that had the generator bracket holes blown out. What I did was built a whole platform for the bracket to live on (including filling the old holes) out of that "welding putty". I was gonna just drill, tap & helicoil new ones with studs locktited in. Then I came across some time-serts. For those that don't know, if any. It's basically a hollow metal sleeve, threaded on the O.D. and threaded through the hole in the middle. The O.D. threads on the ones I got are 9/16-13 (or 12, can't remember now). This will screw into the platform,then the bracket will bolt to the middle part of the time-sert with 3/8 studs. I measured the hole depth of the original holes (that were already welded once, then blown out again) this came out to .420" - .430". This seems pretty shallow, of course the tip of the drill bit digs deeper than the outer rim. right now I am at the .420 - .430" at the tip of the drill bit. It looks as though there my be an oil channel running along the top of the engine from rear to front, right down the middle. I cannot confirm this, therefore I don't know if I can drill deeper. I have the top of the supposed oil channel at a depth of .520"(aprox.), if it is an oil channel I would like to leave some meat there, and stop where I'm at, if not, if it's jus part of the webbing I would like to give the generator bracket holes more beef. Any ideas? Thanks, Kev |