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| Ashlyn Katarzyna:
These are my plans! Drawing only, its too late to start cutting tonite. I'll update it in the next day or so. My $6 chip shield broke last week not bad because it lasted for 2 years, basically it was a piece of plexiglass that I heated and curved 90 degrees, which was secured to the lathe bench with spring clamps and a hook to hold it down along with a piece of cardboard and another clamp. I devised a plan to make my own shield on a budget. I am very confident that it will work as drawn out. I bought a 4 jaw chuck for my lathe so I can secure the rectangular steel block in and bore and counterbore it for the proper bearing support. Could support the front of the pivot with a bushing but I don't think it will be an issue because I don't plan on .0005 tolerance maybe a few thou. The hardest part will be dimpling in the proper location and drilling on center, maybe need to use the mill for stability. Keep in mind this is the shield and pivot mount, not the base and attaching mount, you have to provide that mock up yourself because mini through larger hobby lathes are set up different. I might provide a non-destructive mount for my shield because the Logan is fully restored and original except the paint. What is 660 SAE Bronze like when it gets turned? Does it work harden like Aluminum Bronze does and will turn powdery when it gets cut - similar to cast iron? Opted for steel, that way if I mess up I can fill it with weld and start over. |
| Ashlyn Katarzyna:
I've had a medical emergency that I need to tend to, probably will be out for awhile. |
| spuddevans:
Nice looking plans there :thumbup: --- Quote from: ChadA4MG on February 08, 2012, 02:59:32 PM ---I've had a medical emergency that I need to tend to, probably will be out for awhile. --- End quote --- You just take all the time you need, your health is far more important than machining. I hope everything works out ok for you. Tim |
| Ashlyn Katarzyna:
Well health wise things seem to be on track, CT scan came back good I dont know why it did but its probably that stupid Celiac disease acting up again. Anyways, a few pictures of the processes. I have the first ball detent tacked on, I didn't want to make it too redneck so i did dress up many of the parts prior to welding or press fitting. Color will probably be baked on HT Enamel Silver like the lathe is. I had to use bronze aluminum bushings for the shaft, I couldn't justify buying sintered bronze from the hardware store $6 each and I still had to machine them and a 1.5" bar of bronze aluminum was out of my reach I did have 1 bushing I made on a production run that was perfect and I was able to keep a few slugs and go from there. The shaft is made from an old bench grinder that burned up, I pushed the comm off the shaft and turned it down smooth enough for it function. I also included grooves for retaining rings to keep the shaft locked in place, over all the design is solid and it locks in place in the full up position. A few design changes took place during the initial build. To secure the mechanism to the lathe in a non-destructive manner I will purchase a pair magnetic tool makers block with 250+lbs of pull and turn them on to keep the shield in place. This will be dual purpose as I can use the blocks for milling operations as well, but this will add to the budget of the chip shield by about $72, but I can remove them for cleaning or I can modify/add to the finished product. http://www.shars.com/products/view/1395/5quot_x_2quot_x_2quot_Magnetic_Toolmaker_Block_and_Chuck My initial intent was a budget build, I tend to over build projects by about 200% so many of the things I build will never break under normal or extreme use. This is the backing plate I chose for the mount to the base it is not pictured to have a hole in it yet but I burned up 1 drill and a boring bar on the lathe before I tossed it on the mill for a 1.5" dia hole. The steel is bearing steel so it ate the M2 tool steel up in about 3 minutes. You can't even tell the chuck is moving at 800rpm I guarantee it is even though you can see the model numbers on the jaws :headbang:. Turning the pipe down, it actually is 12" x .750 pipe. I cut the threaded sections off but it could have easily been kept on the ends and use caps with a retainer to hold the shaft in place-intensely complicated and over done-when you see the final the product it is amazingly simple the way I made it. |
| Brass_Machine:
--- Quote from: ChadA4MG on February 16, 2012, 09:31:21 PM ---Well health wise things seem to be on track, CT scan came back good I dont know why it did but its probably that stupid Celiac disease acting up again. --- End quote --- I missed this thread. I am very glad to hear that things will be OK for you. Health things are always frightening. Back to your thread. It looks like you are off to a good start. Will watch this. Eric |
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