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| Dividing head |
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| mattinker:
VT and PekkaNF, I cannot for the life of me remember why I did it that way! The bolts in question have flat heads. Looking at the tool again, having all three heads on the same side would have made it more difficult to use. As you can see, I cut a screwdriver slot in the adjusting screw. I don't think I thought about it at the time, but I used M6 bolts, these have a 1mm thread. 1 turn = 1 mm I don't remember what the Gingery on looked like, I lost the lathe book when I moved here. A useful little tool, I don't think it was responsible for my mistake!! Thanks for your comments, regards, Matthew |
| vtsteam:
Now that you mention it Matt, I started to wonder how mine worked with three bolt heads together like that! Dug around and found a photo -- turns out it was only two bolts. Those and a piece of bent strap, and a piece of square keystock, per Gingery. Two screws and you've got a gauge capable of easily adjusting a boring cutter by a thousandth of an inch. Or less if you have shim stock that thin. Always so simple. Here's the pic: |
| mattinker:
VT, two bolts. I don't know why I added the third. I also added lock nuts, I suppose I was afraid it might unscrew when taking out the feeler gauge! Thanks for your thoughts, regards, Matthew |
| vtsteam:
Lock nuts definitely good idea -- on mine they are on top, out of the picture against the bolt heads. They would be screwed down against the block of key stock when making an adjustment. I like yours just as well -- it shows the same principle can be used in lots of ways -- and your memory of the book was really sharp. Enough to work out an equivalent tool with what was on hand. I think that's the real value of those books -- gives you a feel for solutions to problems with very simple materials and means, by intuition. Gingery kick started people into their own capability. He did for me anyway. |
| mattinker:
Hi, you give my memory far too much credit! I made the gauge over ten years ago. I got into casting through Gingery although I didn't build the series, I made lots of pulleys, sacrificial face plates, machine handles, various parts and a dividing head using a 100/1 worm gear it's big and cumbersome and 100 to 1 is not very practical. I think this gear type dividing head is far more suited to my temperament. regards, Matthew |
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