Building a Redwing

[Twizseven]

Graham. Thanks fir your thoughts. My mate is going to Purbright next week to order a casting and I was planning to go in with him. I would appreciate your foundry details in case we cannot get them done.   Do I need to polish or paint the pattern. Was planning to give very light sanding to remove the odd tiny bits of filament.
Colin

[Alyn Foundry]

Good morning Colin.
Being totally unfamiliar with this material in every way, how does it feel? Obviously a rough finish will be transferred to the sand. Back in the days of my cast Aluminium masters they were just brightly polished, no paint.

From your pictures the surface finish looks pretty good, perhaps a light going over with 1200 grit wet & dry?

   Graham.

[Twizseven]

Drilled centre hole to aid pulling from cope and drag boxes and put in pair of offset location guides.  Was in Walsall yesterday collecting equipment from closed down factory and happened to have the patterns with me so detoured to the foundry and hopefully will have a casting by end of next week.
Colin

[Twizseven]

Collected the casting couple of days ago.
Very pleased with how it came out.
Have included pictures of the inner faces if the patterns with locating dowels.

Colin

[Kim]

That's Excellent, Collin!
Hope it wasn't too expensive?  At least there was no shipping, since you provided the transportation both ways

Kim

[Jasonb]

That looks to have come out very well, almost no fettling required as the joint like is so fine.

[Twizseven]

Kim,
Define expensive.  Casting was £28 plus my fuel and time to collect.

Jason,
Yes the joint line is very smooth.  I wondered how I would align the two halves of the pattern to drill the location spigot holes, then had a brainwave.  I found that I could just fit a garden clothes peg on each of the six spokes.  It was a tight fit but held every thing perfectly in alignment to drill the two locating holes.

I have outdoor electrical cables to run and bricks to lay for next week or so depending on weather so may not get too much time, if any, in workshop.
Colin

[Admiral_dk]

That casting is as close to perfection as I can imagine a casting to be -> Great job Colin 

Per     

[Alyn Foundry]

That casting is as close to perfection as I can imagine a casting to be -> Great job Colin 

Per     

Indeed Per.
When I moved the majority of my patterns over to the Buckley foundry, Roger “ the pattern “ Hughes was insistent upon a meticulous surface finish. He said that “ to get a 100% casting you need a 110% pattern “

Having had a few flywheel castings done at the same foundry I’m certain Colin won’t have any problems with the finished pulley’s.

   Graham.