Re: Collets for 1922 SB model 37 15" lathe
¿ªÔÆÌåÓýI wish it was 2-1/4x8.? Much more plentiful accessories.? My friend will have to cut 2-1/4x6 threads for me when I need mods done like backplates for my recent chucks I purchased.? Beyond my expertise.? He sent me info on the 3-wire measuring system to verify my threads but haven¡¯t been able to get close to the lathe to remove the chuck and try it.? I¡¯d love an easy way to measure internal threads for this as I have another known chuck with the correct backplate that I could measure. Rick ? From: [email protected] <[email protected]> On Behalf Of Steve Wells
Sent: Sunday, February 12, 2023 1:06 PM To: [email protected] Subject: Re: [SouthBendLathe] Collets for 1922 SB model 37 15" lathe ? It looks like there might be a mistake in the South Bend Spindle spec sheets I have The real end date of the 2-1/4-8tpi spindle in the 15-inch might be 6-22-1922 instead of the listed 12-16-1924. They shortened the spindle nose on the 2-1/4-6 by a ?-inch and that was on 6-22-1922. And I see it is a model 37. So the older date looks correct, with the serial no. The bed serial no. appears to have been stamped in 1920, Interesting! ? Steve ? From: [email protected] <[email protected]> On Behalf Of Rick Swineford ? I have the Grizzly serial number info.? I have attached the file. ?The thread is definitely 2-1/4x6.? I may have a nose insert.? My dad had purchased this back in the 70¡¯s? He had it torn down and he repainted it.? It was previously owned by a gunsmith.? Has tons of tooling that a lot of it we cannot identify.? I have a very good friend who is a machinist by trade and he is not sure what some of it is.? It sat for over 30 years at my dad¡¯s in Ohio.? I moved it to Florida in early 2000¡¯s.? I have done some very minor work with it, but it is currently buried.? I am renovating the shop and putting in storage cabinets.? I have a HF 7x12, a small Atlas (needs the drive section) and another small lathe unidentified with a lever operated tailstock, may have been used for turning starter armatures.? Again, renovating the shop so that I can get to the machines.? Also have an old B&S horizontal mill and an Atlas shaper, it too missing the drive section.? I retired 2 years ago and immediately got shoulder replacement which set me back for about 6 months.? Then family medical issues with pneumonia, RSV then covid, all last year.? Slowly catching up on normal household repairs and getting to the shop.? I have plenty of projects to keep me busy. Rick ? From: [email protected] <[email protected]> On Behalf Of Bill in OKC too via groups.io ? Feel for you, Bro. My first class was in 1973, and only a semester (or maybe a quarter) long. Finally got desperate in 2008, and bought a Harbor Freight 93212 7x10 Mini-Lathe. Same one they carry in the stores now. Not a terrible machine, really, but I was a terrible machinist, and couldn't figure out why. Until my wife got tired of listening to whine, and told me to take another class. Started the class in February, 2015, finished in May of 2022. Should normally take 8-9 months, if you go full-time. Long story short, I was a crappy machinist because I could not accurately measure anything. There is a sense of touch you need to get the caliper or micrometer consistently tight enough to get the correct reading. I lost that sometime between 1973 & 2008. Only took a few hours sitting in class with a set of Jo-blocks and my mikes and calipers, and I had it. I've got more than one lathe, though the 7x10 is now gone, and the one I've spent the most time on lately is an Atlas TH42, which now sports and ER32 collet chuck on it's 1-1/2"x8tpi spindle. MT3 taper.? I traded the 7x10 for a couple of Unimats, an SL1000 and a DB200, which are essentially the same machine. They can be configured as either a lathe or milling machine with minimal accessories. I've made an ER25 collet chuck for one, of them, though I haven't gotten to test it. Also, I made it on the big machines at school. A Clausing Colchester 13, that being the closest thing they had to my smaller machines.? ? As a restoration project, there is a 1941 South Bend Heavy 10L sitting in the back of the shop, too. 2-1/4"-8tpi spindle on it. They have a proprietary insert that adapts to, in the case of mine, an MT3, IIRC. Might be MT4.? I've heard it said that the insert is about a Morse 4.5, but can't swear it's accurate. If you can get measurements of the taper, you can make all the inserts you want! Those inserts are not held in by a drawbar, BTW. I guess they're a self-holding taper just as the normal Morse Tapers are.? ? The tailstock is definitely an MT3, though. Steve Wells' site has a lot of the old catalogs and machine forms, so you might be able to find out more about your machine there. If you have the serial number, you can get a copy of the serial number card from Grizzly. It will at least tell you how it was originally equipped, and when it was shipped to the first owner. Gets you the correct model number, too. Can be useful looking at those forms and catalogs.? ? I've not tried for an ER40 yet, as none of my functional machines can make full use of that size collet. But someday! ? HTH! ? Bill in OKC ? William R. Meyers, MSgt, USAF(Ret.) ? Aphorisms to live by: Good judgement comes from experience Experience comes from bad judgement.? SEMPER GUMBY! Improvise, Adapt, and Overcome. ? ? ? On Saturday, February 11, 2023 at 08:53:28?PM CST, Rick Swineford <terrapinsystems@...> wrote: ? ? Looking for options to add collets to my very old SB 15x8 lathe.? I have seen the recent posts on using a backplate and ebay/amazon ER40 chuck.? Wondering what was the original taper in the tube of my SB model 37?? Is it morse or what I believe is SB propietary?? If morse, then I would need a drawbar and nut for the tube.? As close as I can tell the threads are 2-1/4x6, not 2-1/4x8 like the newer lathes. |
Rick Swineford