No the sprockets are not off a bike I bought them from a shop near me here down under
http://bendigobearings.com.au/products/sprockets/ they have all I need Bill From: 'Curt George' via Legacy Ornamental Mills <legacy-ornamental-mills@googlegroups.com> Sent: Monday, May 1, 2023 10:12 PM To: legacy-ornamental-mills@googlegroups.com Subject: Re: range of pitches, two questions Good morning everyone. Bill I have a question on your gears? Where did you find those gears that you used? Are they form a bike? I find "OLD SCHOOL" stuff like chain and gears are today not as easy to find, Most hardware stores no longer carry things like chain and... anymore. C.A.G. On Monday, May 1, 2023 at 06:35:10 AM EDT, cdkr...@gmail.com <mailto:cdkr...@gmail.com> <cdkra...@gmail.com <mailto:cdkra...@gmail.com> > wrote: Thank you all for the suggestions! I, too, like the sprocket set up for the finer ratios. It can offer a really broad range of ratios once set up. Thank you for the reminder, Bill. I'll put that spice in the pot and see what soup tastes like! Has anyone mounted a worm gear configuration attempting to get to the very large ratios? I have only the standard gear set on the REVO if I understand correctly. At $200 a whack, I can afford to dream up alternatives, like the worm gear. DanK On Monday, May 1, 2023 at 12:42:06 AM UTC-4 Curt George wrote: Nice Bill. I very much have always like your chain configuration. Quick, Clean, Easy... Awesome! C.A.G. On Sunday, April 30, 2023 at 11:10:27 PM EDT, <bulk...@mmnet.com.au <mailto:bulk...@mmnet.com.au> > wrote: Or he could make up some sprockets and chain that’s a cheaper way to Get pitches to cut threads Bill From: legacy-orna...@googlegroups.com <mailto:legacy-orna...@googlegroups.com> <legacy-orna...@googlegroups.com <mailto:legacy-orna...@googlegroups.com> > On Behalf Of Tim Ziegler Sent: Monday, May 1, 2023 12:24 PM To: legacy-orna...@googlegroups.com <mailto:legacy-orna...@googlegroups.com> Subject: Re: range of pitches, two questions just got to buy up a few used LOM's and suddenly you have all the parts you need. lol Kind Regards, Timothy J. Ziegler Ziegler WoodWork & Specialty 14171 160th Ave. Foreston MN 56330 320-294-5798 shop 320-630-2243 cell On Sun, Apr 30, 2023 at 8:47 PM cdkr...@gmail.com <mailto:cdkr...@gmail.com> <cdkr...@gmail.com <mailto:cdkr...@gmail.com> > wrote: Before LOMs came on the horizon I dreamed of turning items with a 1/4 turn twist, like table legs, stretchers, canes, etc. More recently I have dreamed of "checkering" a 1-1/4" cylinder for wooden handles. In between there is the possibility of cutting wood threads, internal and external. I've been trying to educate myself on how to discover the ratios needed to make something like this happen on LOM REVO. So the specs I used were a maximum 40" length of twist and all of the 1/4, 1/2, 3/4, 1, 2 .... 10 pitches. For checkering, there are several densities including the most common of 16 -21 lpi and several common angles of intersection ranging from 30° to 90°. Putting this all together in a spread sheet containing the gear charts I've come across and the formulas to calculate what's not charted, I've found that the range of ratios is ENORMOUS! For example, a 40" workpiece with a 1/4 twist takes a net ratio of 640:1 and a 21 LPI pattern at 60° on a 1.213" diameter cylinder takes a .8202 pitch of cut. That's if I've done the math correctly. What this leads to is a lengthy wish list of gear combinations, even if peeled down to more common situations. And I don't have the .25 or 2X, even 4X gear sets. How many banks do I have to rob to get one or more of these if available? I foresee using a nest of double gears. I need to study more about what "Group A", "Group B", and "Group C" means. And how the workpiece pitches were calculated from the gear combos. Any hints? So, realistically, CNC is the "logical" solution, but no one has recently accused me of being logical. Increasing the pitch of the lead screw isn't all that helpful DanK -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To unsubscribe from this group and stop receiving emails from it, send an email to legacy-ornamental...@googlegroups.com <mailto:legacy-ornamental...@googlegroups.com> . To view this discussion on the web visit https://groups.google.com/d/msgid/legacy-ornamental-mills/d32a27a3-dae4-4445-a1b1-75951335a335n%40googlegroups.com <https://groups.google.com/d/msgid/legacy-ornamental-mills/d32a27a3-dae4-4445-a1b1-75951335a335n%40googlegroups.com?utm_medium=email&utm_source=footer> . -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To unsubscribe from this group and stop receiving emails from it, send an email to legacy-ornamental...@googlegroups.com <mailto:legacy-ornamental...@googlegroups.com> . 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