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PostPosted: Tue Sep 15, 2020 7:02 pm 
retrobike rider
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Location: Hartlepool - North East
Teaser Pic from Dan Chambers ( danson67) His repairs are now finished (hopefully he will add to this thread) and he has sent off and had the frame and components returned from Acorn Plating


Attachments:
712354AD-4DF5-4500-90EB-2CDD6712733D.jpeg
712354AD-4DF5-4500-90EB-2CDD6712733D.jpeg [ 177.47 KiB | Viewed 262 times ]


Last edited by daveyla on Wed Sep 16, 2020 3:40 pm, edited 1 time in total.
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PostPosted: Tue Sep 15, 2020 7:05 pm 
Old School GrandMaster | Rider
Old School GrandMaster | Rider
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Joined: Thu Nov 26, 2015 7:29 pm
Posts: 7205
Location: peak district
:shock: 8)


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PostPosted: Tue Sep 15, 2020 8:25 pm 
BoTM | rBoTM | rider
BoTM | rBoTM | rider
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Joined: Wed Jan 17, 2018 8:42 pm
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Location: VCC Member 5558 East Riding of Yorkshire
Everyone needs a Dan...


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 Post subject: Re:
PostPosted: Tue Sep 15, 2020 8:33 pm 
retrobike rider
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Location: Hartlepool - North East
Absolutely he’s such a master craftsman and superb engineer as well as being a great guy


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 Post subject: Re:
PostPosted: Wed Sep 16, 2020 11:35 am 
retrobike rider
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Location: Hartlepool - North East
I’ve tried but have been unsuccessful in relation to uploading a video of a fantastic gift I received. A parcel was sent to me all the way from Canada with an awesome selection of goodies. The standout item is the original Royce BB from the Pace when Richard Thackray raced it

My aim from the outset has been to retain as much originality as I possibly can and having the bottom bracket to return to the F1 is a big step in that direction

I am truly blown away with the generosity and support I’ve been given so far and hopefully there will be more exciting updates

If anyone is a member of the Pace owner’s group on FB the video is on the thread there. In terms of the BB it’s started its journey to Royce via Canada and the North East for the engineers there to give it a factory service. I will post a picture of it when it has been returned


Attachments:
F635F55A-954C-4434-8AC3-069FCE9F2833.jpeg
F635F55A-954C-4434-8AC3-069FCE9F2833.jpeg [ 2.01 MiB | Viewed 220 times ]
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PostPosted: Wed Sep 16, 2020 12:00 pm 
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Joined: Wed Oct 03, 2012 5:03 pm
Posts: 345
Location: High Wycombe
I can see from this thread where my X-Lite bar ends are going to end up...


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PostPosted: Wed Sep 16, 2020 12:24 pm 
retrobike rider
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Kell wrote:
I can see from this thread where my X-Lite bar ends are going to end up...


They sure are and will be there on the finished pics


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PostPosted: Wed Sep 16, 2020 3:19 pm 
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Location: High Wycombe
Nice build by the way.


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PostPosted: Sun Sep 20, 2020 9:17 pm 
retrobike rider
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Location: A wretched hive of scum and villainy...
Right then...previously on The Purple Pace build thread we had got as far as cutting out the crack in the headtube/down tube joint... :)

Now making things better:
First tight pass to fill the crotch of the cut out joint. A bit of slag inclusion from the inside of the weld, but not major:
Attachment:
Weld1.jpg
Weld1.jpg [ 275.56 KiB | Viewed 142 times ]

Then finish with a clean second pass (photo after caustic etch):
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Weld2.jpg
Weld2.jpg [ 227.76 KiB | Viewed 142 times ]

On to the three small pierced holes on the downtube.
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Weld5.jpg
Weld5.jpg [ 269.23 KiB | Viewed 142 times ]

Short weld to fill, then to horizontal milling machine to remove back to the original tube surface.
I wasn't happy with the smeared finish from the cutter on a test piece, (bottom right) so had it re-sharpened and tried again (Left and top right).
Attachment:
Mill4.jpg
Mill4.jpg [ 299 KiB | Viewed 142 times ]
Attachment:
Mill2.jpg
Mill2.jpg [ 388.76 KiB | Viewed 142 times ]

Happy with that, but for the small low patch left from the weld pool, but best not weld a 2nd time in the area, so will leave that.
Attachment:
Mill3.jpg
Mill3.jpg [ 285.16 KiB | Viewed 142 times ]

Finish off the caustic anodising strip all over. This cleans off the anodising, first the colour disappears (which is just a dye), followed by the anodising itself.
At this stage all the non-aluminium alloying elements are deposited on the surface, and the result is black, grubby and patchy.
Not to worry...a quick bath in a dilute nitric acid solution lifts this and cleans up much of the surface.
Attachment:
Caustic1.jpg
Caustic1.jpg [ 260.12 KiB | Viewed 142 times ]

This is the area that was welded and milled back. As you can see, the weld pool is showing in the material although the surface is flat:
Attachment:
Caustic2.jpg
Caustic2.jpg [ 250.64 KiB | Viewed 142 times ]


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PostPosted: Sun Sep 20, 2020 9:44 pm 
retrobike rider
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Location: A wretched hive of scum and villainy...
Ream and chamfer both ends of the headtube, but still looking a bit grubby, off on a journey along with some small parts (Bar ends, QR axle ends and seat clamp).
Attachment:
Caustic3.jpg
Caustic3.jpg [ 229.58 KiB | Viewed 138 times ]

With some TLC and a professional nitric acid de-smut at the anodisers (Acorn Anodising of Sandhurst), things are looking much better:
Attachment:
Anodise1.jpg
Anodise1.jpg [ 146.04 KiB | Viewed 138 times ]

Steve at Acorn was not happy with this prep result though, which he thought was still a little patchy:
Attachment:
Anodise2.jpg
Anodise2.jpg [ 109.13 KiB | Viewed 138 times ]

However, the certain remedy was to have the frame physically polished or bead blasted, both of which would have removed metal and probably lost some of the sharpness of the machining etc, so we decided to go ahead anyway and see what the result was.
Once anodised and coloured, it appeared to be a little dull and patchy still, with some colour variance, especially some sort of fringing around some of the welds. Steve wasn't 100% satisfied, and was a bit disappointed too, but without more stripping then polishing or blasting, that was as good as we were going to get. :|
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Anodise5.png
Anodise5.png [ 690.19 KiB | Viewed 138 times ]

Attachment:
Anodise3.jpg
Anodise3.jpg [ 124.75 KiB | Viewed 138 times ]

The small parts looked to be all OK, and a nice match for the original fork crown:
Attachment:
Anodise5.jpg
Anodise5.jpg [ 153.5 KiB | Viewed 138 times ]

So...what to do? :|

...Knowing how thirsty and absorbent fresh anodising can be, I went over the frame with some Wurth Sabesto paint protector, followed by a couple of coats of wax/turpentine polish:
Attachment:
Anodise4.jpg
Anodise4.jpg [ 159.04 KiB | Viewed 138 times ]

Much better. :D
Now on to re-fitting the grease nipple, bottle boss rivnuts and steel thread inserts...


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