Screw and Idle gears
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3D-printed gears should work just fine. As long as you don't drop or crash the machine. There is a groups.io group for that purpose (among other) that I happen to own. /g/3D-Printing-for-Metal-Hobbyists/topics From what I've read, ABS or Nylon would be good choices. That's from investigation a couple of years ago, so there may be better choices now. Metal gears from Boston Gear can run upwards of $100 each. Having the gears printed I couldn't tell you what it would cost now, but if you have your own 3D printer and the necessary computer files, you can print them yourself. My printer, with an Atlas TH42 style gear for metric transposition looked to have at least a 24 hour print time for one gear. Looked like it would use about half a roll of ABS filament. At the time, I had about $21-23 in rolls of the ABS filament. I didn't have the files for the South Bend Heavy 10L, though I did have them for my Atlas. You may be able to find them on Thingiverse. I did. If all else fails, you could use 3D printed gears until you can collect the proper steel/iron gears. On the screw, you can get a blank from McMaster-Carr. If your leadscrew needs the keyway the length of the leadscrew, you'll need to find someone to mill it for you. Depends on the size/length you need for your cost. Grainger may have the material, too. I haven't checked on them yet, though I do have one local to me. Seems to me one of the members here can do it, you'd have to talk to him about cost. Guenther Paul is the member I'm talking about, and I know he belongs to several of the other SB lathe groups, just not sure if he's here, too. Bill in OKC William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Thursday, July 15, 2021, 10:11:03 AM CDT, pwoolybul via groups.io <pwoolybul@...> wrote: I bought a South Bend 9c lathe that had been dropped. The screw and idle gears have be broken. Does anyone know were to get one or will a 3d printed gears work as a replacement.? Also if 3d printed gears will work what printing materials should be made of. Any help here would be very helpful. |
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You should have probably mentioned that he needs to know the DP of the gears he wants to make so he knows how big a printer he needs to buy. My Atlas TH42 uses 16DP gears. The 127-tooth gear for cutting metric threads is a bit over 9" across, IIRC. I bought a 3D printer that has a 300mmx300mmx320mm build volume. That was before I got the Heavy 10L. IIRC, it uses 18DP gears, but I haven't actually checked that, since I need to get it restored before that is a real concern for me. Bill in OKC William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Friday, July 16, 2021, 09:40:03 AM CDT, Keith <knedvecki@...> wrote: Do you have a 9 Junior lathe?? Have you checked the s/n and what is your diametral pitch? |
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Sounds like we can all help each other! Too cool! I'm several sorts of mechanic, no sort of expert at anything, but I have fun doing a bunch of stuff. I have, I think, already mentioned my 3d printing group, and there are a couple I'm a member of that might be of interest, too. /g/digitalhobbyist is 3d printing, CNC, ELS of several flavors, and a good bunch of folks. /g/E-Leadscrew is probably the original group for folk interested in a hobbyist electronic leadscrew system, and another bunch of good folks, with some overlap between them. John Dammeyer, the group owner, has an ELS system he designed and sells installed on his SB heavy 10L, though they talk about all sorts of ELS systems. He's working on a newer version of the old one taking advantage of newer processors and encoders and such like components. And it's all open source. William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Friday, July 16, 2021, 10:27:55 AM CDT, pwoolybul via groups.io <pwoolybul@...> wrote: To answer the first question: I don't believe that the lathe is a junior. The second question is that dp is 18. I have already model the gears in cad and have ,stl files for making them. My experience in 3d printing has been for industrial usage.? I do not any experience with the hobby type 3d printers.? I am a retired engineer and have had experience with designing gears for different products in the pass. Thank you all for your help. For as being new to this forum, I am looking forward to learning form you all. |
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The Atomic ELS is, IIRC, a Russian invention. Most of the info is on a site in Russia, I think. I'm a member of the IO group, but never made it to the Russian source. I'm not nearly ready to go there yet, as I'm still learning manual machining. Bill in OKC William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Friday, July 16, 2021, 11:36:28 AM CDT, mike allen <animal@...> wrote: ??? ??? theres this one also , I'm not quit sure where they keep the info , cause I haven't gotten that far myself animal On 7/16/2021 8:39 AM, Bill in OKC too via groups.io wrote: Sounds like we can all help each other! Too cool! I'm several sorts of mechanic, no sort of expert at anything, but I have fun doing a bunch of stuff. I have, I think, already mentioned my 3d printing group, and there are a couple I'm a member of that might be of interest, too. /g/digitalhobbyist is 3d printing, CNC, ELS of several flavors, and a good bunch of folks. /g/E-Leadscrew is probably the original group for folk interested in a hobbyist electronic leadscrew system, and another bunch of good folks, with some overlap between them. John Dammeyer, the group owner, has an ELS system he designed and sells installed on his SB heavy 10L, though they talk about all sorts of ELS systems. He's working on a newer version of the old one taking advantage of newer processors and encoders and such like components. And it's all open source. William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Friday, July 16, 2021, 10:27:55 AM CDT, pwoolybul via groups.io <pwoolybul@...> wrote: To answer the first question: I don't believe that the lathe is a junior. The second question is that dp is 18. I have already model the gears in cad and have ,stl files for making them. My experience in 3d printing has been for industrial usage.? I do not any experience with the hobby type 3d printers.? I am a retired engineer and have had experience with designing gears for different products in the pass. Thank you all for your help. For as being new to this forum, I am looking forward to learning form you all. |
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I can't answer your questions, but there was a 116-tool SB change gear on Ebay just a couple of days ago. Heck, found it again: https://www.ebay.com/itm/393150136206?hash=item5b8992ff8e:g:pkwAAOSwGLZgNQcp William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Friday, July 16, 2021, 12:06:42 PM CDT, david pennington via groups.io <davidwpennington@...> wrote: The gear tooth counts you say you're looking for--116 and 108--strike me as odd. My 9C has the full set of change gears, and the highest tooth count is 80. Do you have the gear cover with its graphics depicting gear arrangements for threading and fine feed? Do you have an intact banjo? I went back to read your original post. You said the lathe was dropped. Just what was damaged? Was it only the change gears? What undamaged gears do you have? (Sorry for all the questions: my goal is to understand your situation, so I can help you get where you want to be.) Obviously, there are other more intriguing options, as Jeff Chadima suggested. Dave David W. Pennington Denver, Colorado 720-442-3744 On Friday, July 16, 2021, 07:17:59 AM MDT, pwoolybul via groups.io <pwoolybul@...> wrote: I would like to thank you all for your help. I tried to fine the gears on Ebay with no luck finding a match for the ones that were on the lathe. The idle gear has a 6 to 1 ratio with the large one being 108 tooth gear and the small gear 18 tooth gear.? I did fine a 5 to 1 gear one Ebay but they want over 100 dollars for it. Did not fine the 116 tooth screw gear either. So it looks like I am finely going to have to buy a 3d printer (any thoughts on what printers that will do the job) and using abs filaments. I do have a Shapeoko 3 router I may try cutting them out of aluminum plate, but I do not know it they would be accurate enough to run smooth enough to not bind up and created a load on the machine. |
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Glad I could help! Bill in OKC William R. Meyers, MSgt, USAF(Ret.) A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. LAZARUS LONG (Robert A. Heinlein) On Friday, July 16, 2021, 01:33:44 PM CDT, pwoolybul via groups.io <pwoolybul@...> wrote: thank you Bill in OKC too I just purchased the the gear on Ebay. The last part that I need now is the Idle gear. All the other parts have been purchased. The damage done were to the following parts: the 2 gears. the handle was broke off the reverse gear mechanism, the banjo, and the 4 screws that hold the lead screw to the lathe bed were sheared off. |
Bill in OKC too
davesmith1800