Minnie TE Long term project

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Jasonb:
Comming alonge nicely Joe

Its not quite as simple as setting a rotary table at and angle and milling slots, the slots actually need to follow a helix around the rim, thats why it would be more like cutting a multi start thread. Each of the rear strakes need to be twisted slightly to follow the same helix before being rivited on.

J

Zadig:

--- Quote from: Jasonb on March 21, 2015, 03:50:20 AM ---Comming alonge nicely Joe

Its not quite as simple as setting a rotary table at and angle and milling slots, the slots actually need to follow a helix around the rim, thats why it would be more like cutting a multi start thread. Each of the rear strakes need to be twisted slightly to follow the same helix before being rivited on.

J

--- End quote ---

I don't see how this cannot be done comfortably on such a small scale - keeping any error to an aesthetic minimum.

The helix is hardly discernible on the bigger scales. Twisting is only necessary to bring the strake in line with the rim. If the rim was machined as per the front wheels then the helix is already incorporated. It would only be the sides of the strake that would not follow and I cannot see how this would be noticeable to an extent that would offend the eye.

Zadig:
Now I have thought about it, I can see my error. Ignore my last remarks.

Joe d:
Zadig I enjoyed building the pillar tool, haven't quite finished all the extra bits for it yet. The biggest problem was finding somewhere to bolt it down. It really does make tapping less nerve wracking. I've started reading your thread about your Burrell, wish I had both the room
and the machinery to tackle one that size.

Mexican Jon: I suspect that I learned that trick on one of these fora, essentially a factory-made form tool.

Jason Thanks

Joe

Zadig:
Joe, I thought the pillar tool looked like a bit of quality, I had a vain hope that it was Chinese!

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