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| Photos of gear cutter form tool. |
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| raynerd:
Hi, I`m sorry for the questions, I`ve got a few things going at the same time - all based on the same engine/build. I`ve cut a few gears now for clocks (wheels) and my last attempt with Stew was succesful. I will continue with this method of wheel cutting when I resume my clock build...when that may be! However, I`m now after cutting a spur gear and I`m really happy now, after much headache, about how I will cut the gear. I`m going to use the calculations in John Stevensons article to make my cutter to get the correct profile. I`m actually all ready to go, I`m just not absolutely clear about how to make the cutter profiling tool. I can see all the measurements, I`m just not clear how to mount the buttons. Again, I can see from John`s article it is using grub screws but I think a picture would be helpful just to clarify! Is the distance between buttons adjustable or does the bore for the buttons just have to be cut accurately so that they are the correct distance apart. Does anyone have a picture of a gear cutter profiling tool? Just to be clear, I`m not asking for the gear cutter itself or even the profile of the cutter, I`m just confused about the tool for holding the pins/buttons to offer upto the gear cutter blank. John article... http://www.metalwebnews.com/howto/gear/gear1.html Any help very much appreciated. Chris |
| Pete.:
I can answer that because it's very simple, and because I just spend two days cutting my own first ever gear. Once you work out the size of the buttons you need, and the distance apart, using the info from that page all you do is take a piece of flat plate and cut a slot in the end just wider than the gear cutter that you are making, and deeper than the tooth depth. Any old scrap plate will do, just make it thick enough so it won't bend. |
| raynerd:
Pete, I thought that was the case but by any chance any photos??? I get the impression the buttons go in at an angle to get the correct front relief? |
| Pete.:
Got no photos becauseI didn't use the button method, but I did a drawing if it helps. White is the mounting plate, blue the buttons and the red line is where you machine the buttons down as mounted on the plate. |
| raynerd:
AHHHHhhhhhhhh!!! :doh: :doh: :doh: Buttons!! Now it all makes sense. So there is only a small width of full diameter (button), the diameter is then taken down to a smaller dia to put through and fasten to the plate. Cheers Pete! |
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