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Moving a stand threaded mounting hole on a D7 frame.
Mags 1
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November 14, 2017 - 9:20 pm
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I realised that I wouldn't be able to use this frame until I made centre stand operable, no good trying to do that after a repaint etc with wheels and engine in the frame, time to tackle this job was now, whilst it was so easy to manoeuvre around.
I got out the angle grinder and cleaned up both sides, the threaded hole was fairly clean already, so I let that be.
Here I'm using the brass 'tongue' from an old door lock, brass clamped on with welder earth clamp stops welding wire going out other side of hole, mig wire won't stick to brass of course.
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Makes a good welding table, but I'm mistreating it really, it's a bit too good for this job to be honest. Welding could affect ram and destroy it....
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A good dollop on this side to start.
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Brass had done its job.
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Followed by another good dollop the other side.
Plenty of penetratoion into steel needed here, no half measures.
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Ground both sides fairly flat.
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Repaired side here does look thicker though.
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But how was I to accurately measure position of new hole for mounting bolt?
Screwing in a back brake pivot bolt and a centre stand shouldered bolt into holes on other side of frame gave me good measurements, due mostlt to the heads of said bolts still having central machining marks upon them! Tightenbed bolts up and measured dead centres. Got about 2 inches and 3 sixteenths or something like that, forget now!
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Yes, heads were a dead give away.
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About one and seven sixteenths actually.
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But my eyes let me down with the marking out, I almost gave up after making a mess of it.
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Until another better idea occured to me, why not bolt good side up and use transfer punch to mark correct position through hole of a good straight centre stand, it worked.
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Like this here.
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Punch mark seems a bit off though?
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But spring mounting bracket was hitting same dent in main frame, aha!
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Very glad I've got the new drill press, frame sat level on footrest bracket mount and jammed itself nicely into vice.
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Used a centre type bit, shortness means it can't bend or flex and it makes a good accurate first pilot.
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Hole was a pig, had to use sulphur based lubricant as bits got hot, even good taps were squeaking in drilled holer.
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Started with a second and finished with a bottoming tap.
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I've seen better, but it's straight and clean.
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Bolt goes in nicely too.
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Bracket hitting same dent in frame.
All I need now is some nuts to go with the bolts, as safety anchor points at rear.

Four now on the road and at least several in bits.

Sunny Felixstowe
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November 16, 2017 - 8:29 am
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That's impressive work Mags,I'll know who to come to for frame repairs!

D7/14 hybrid (4 speed with D7 crank etc.) on the road, D10 Bushman awaiting rebuilding.

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