Hat and Rehat
Call Me a Cab
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I knew it was an old post. I was just trying to add to the database in case it was suggested to someone that they ought to google their querry. ;-)You’re replying to a post that is over 9 years old...don’t expect a reply.
How did you set the oval? I can see how the circumference wouldn’t be that difficult, but the shape/oval sounds tougher to get right. I’ve seen lathes with duplicator capabilities for making furniture legs etc. CNC machines would be the way to go, but a huge investment that isn’t practical if you’re only making blocks for yourself.
If you’re looking at using your blocks to make hats that others will buy, most customers will want to know the profile of the block. The #52 block is a perennial favorite, but others are needed if you’re going for a different look. I think you might end up money ahead if you bought the commercially made blocks of the profile you’re after (or keep watching the used/vintage market).
You might also see if there is a hatter who will let you do some sort of abbreviated apprenticeship?
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This might be a more complete answer to what you asked me about the oval.
The oval on the block base was pretty easy. I had my oval on paper, then glued it to the bottom of my cube of laminated wood, removing wood until the oval remained. I tried to stay perpendicular to the bottom, creating an oval cylinder, and also being perpendicular to the top. Then I bisected my paper oval on the bottom, front to rear (see the attatched pictures), followed by a series of lines perpendicular to that center line. This block was my third one and I was getting confident (cocky?), so there are 5 lines. My first two had one every 1/2".
Using a square I could now transfer all of my lines fom the bottom to the top (6 on this block) and mage a grid, in theory, aligned with the one on the bottom.
After that I could take A, B and B, C measurements, per my chickenscratch on tbe bottom of the block, with AB = BC, and cary my oval from the bottom to the top, even as it tapered up smaller. The shaping between the top and bottom ovals was all by eye, but the grid makes it pretty easy to sight down and see variations. It made it even easier than I expected. Picturing the symmetry of the entire oval is difficult, but pictiring the cross hatched part compared to the checketed part isnt very difficult at all. Running my palm on the block as I sanded identified high ridges or flat points, and I also had two hats with the crown open to check my progress against.
This block is, presntly, a little more symmetrical front to back than my others, but that will change a little as I break the sides into curves, because one end will start to curve a little lower than the other, and have a wider radius. The black hat in my picture does that on the back, but i have others where the hatter chose to use that as the front of their hat.
You really can get a pretty good block this way.
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