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Re: Reverse tumbler Mod for a 9A
开云体育You want the one of a 10L the first one on your listNick On 2023-02-15 7:51 p.m., mike allen
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Re: ER Collet nut
But it does work as that is how I have been threading Metric since making the 4 stud gears I needed. Its important to note that when reaching the end of the thread on each pass you STOP the lathe, then dissengage the half nutsand return to the beginning of the next cut, now note; ?just return the carriage slowly untill you can re-engage the half nuts to the marked position from your first cut. And then repeat this procedure untill completing to your desired fit. ?I must impress though, that you should select a spindle speed that allows the spindle to stop fairly quickly or. having a VFD with breaking set light(as I have) allows a fairly quick stop without threat of losing the chuck ;) BTW I have 1947 9A and a 1986 10K underdrive - with a Hitachi VFD
On Wednesday, February 15, 2023 at 09:18:51 AM PST, m. allan noah <kitno455@...> wrote:
Too bad it isn't true. allan On Wed, Feb 15, 2023 at 11:53 AM Andrei <calciu1@...> wrote:
-- "well, I stand up next to a mountain- and I chop it down with the edge of my hand"
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Re: ER Collet nut
开云体育??? ??? Thanks Nick , if one of those tumblers falls into my lap I'll be reachin out to ya . ??? ??? thanks ??? ??? animal On 2/15/2023 4:20 PM, Nick Jonkman
wrote:
Yes and I also installed the reverse tumbler from a 10 " many years ago. I think they were running around $75.00 then, but I love it. |
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Re: ER Collet nut
开云体育Yes and I also installed the reverse tumbler from a 10 " many years ago. I think they were running around $75.00 then, but I love it.By the way I made a drill guide bushing to do the job which I have loaned out when needed. I believe I did get it back as well as the pattern for the plate if anyone needs it. On 2023-02-15 7:14 p.m., mike allen
wrote:
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Re: ER Collet nut
开云体育??? ??? Yep , that makes sense , right now I? don't have a reversing switch on my treadmill motor . That's on top of my more important sh** to do list . I'd also like to get a reverse tumbler off a 10" lathe so you don't have to use a wrench to reverse the lead screw .? But geeze people think those things are made out of gold ! I'm not a miner . Ive got a bunch of experimenting when I get my lathe moved over to the new shop . ??? ??? thanks ??? ??? animal On 2/15/2023 4:06 PM, Nick Jonkman
wrote:
I also power reverse the spindle. |
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Re: ER Collet nut
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Re: Metric threading on a 9A ?
开云体育HiI have a set of metric threading? gears for my 9A and the few times I have used them I did not change the banjo. They came with a chart showing the position of the gears on the 9A banjo. They coordinated with the quick change gear box. Nick On 2023-02-15 1:12 p.m., mike allen
wrote:
??? ??? A bud gave me a set of the metric threading gears for my lathe |
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Re: Metric threading on 10L ?
You're absolutely correct. I just pulled the gear cover and verified that the gears in my gear train have a smaller DP than this printed conversion gear.
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And a rereading of the papers that were shipped with the grear found a pitch chart for the double-tumbler QCGB only. I'll send a note to the ebay seller, asking him to make this distinction clear in his item description. On Wed, 15 Feb 2023, m. allan noah wrote:
The single tumbler is not compatible with those gears without a bunch of work. They do not have a banjo that allows the gears to be moved or --
Rick Green |
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Re: Metric threading on 10L ?
m. allan noah
The single tumbler is not compatible with those gears without a bunch of work. They do not have a banjo that allows the gears to be moved or replaced. IIRC, the existing gears are also a different pitch (18DP maybe?) allan On Wed, Feb 15, 2023 at 3:02 PM Richard Green <rtg@...> wrote: Mine is a 1943 production single- tumbler unit.? (Pull-knob and top lever as -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand" |
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Re: Metric threading on 10L ?
On Wed, 15 Feb 2023, mike allen wrote:
??? ??? I forgot this was in the files section . See if this helpsThanks for the link. All those charts appear to be for 9in lathes without QCGB. Still looking. -- Rick Green We, the People of the United States of America, reject the U.S. Supreme Court's Citizens United ruling, and move to amend our Constitution to firmly establish that money is not speech, and that human beings, not corporations, are persons entitled to constitutional rights. |
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Re: Metric threading on 10L ?
Mine is a 1943 production single- tumbler unit. (Pull-knob and top lever as well)
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The gear I purchased is the half-sized one which supposedly fits within the gear cover and can be left in 'permanently', although there is no claimed means for switching it in and out of the gear train as needed. On Wed, 15 Feb 2023, m. allan noah wrote:
Do you have a double tumbler, or single tumbler gearbox? --
Rick Green |
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Re: Metric threading on 10L ?
m. allan noah
Do you have a double tumbler, or single tumbler gearbox? allan On Wed, Feb 15, 2023 at 1:58 PM Richard Green <rtg@...> wrote: I purchased on ebay a 3D printed compound gear that is supposed to enable metric -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand" |
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Re: Metric threading on 10L ?
I forgot this was in the files section . See if this helps
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/g/SouthBendLathe/files/Techinfo/Metric%20Threading ??? ??? animal On 2/15/2023 10:58 AM, Richard Green wrote:
I purchased on ebay a 3D printed compound gear that is supposed to |
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Re: ER Collet nut
Don’t make this harder than it has to be. No hand cranking needed. Just run slow, when you get to the last thread or so, shut the power off. The spindle will coast to a rest. Crank out of cut. Run lathe in reverse to beginning. Dial the crossslide back in to new depth of cut. Rinse and repeat. No need to touch the half nut if you have a decent size relief.
If you need to cut to a narrow relief, follow the video that was posted earlier. This video: ? I believe with the method posted in the video, you need to get back to the same number, on the same rotation of the dial. If the dial goes around twice, you must reverse it twice. Pay attention. |
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Metric threading on 10L ?
I purchased on ebay a 3D printed compound gear that is supposed to enable metric threading on my Heavy 10.
The gear appears to be printed well, and is equipped with a bronze bushing center for reduced wear and longer life. What I didn't get, however, is any instructions. Can someone give me guidance on how to integrate it into the geartrain, and point me to a spreadsheet or PDF of a new threading/feed chart after the modification? -- Rick Green |
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Re: Metric threading on a 9A ?
开云体育??? ??? Good deal ??? ??? thanks ??? ??? animal On 2/15/2023 10:20 AM, Phillip Rankin
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Re: Metric threading on a 9A ?
???? ??? A bud gave me a set of the metric threading gears for my lathe . I keep thinking I? have seen on some lathes you need a different banjo to use these gears . DO you use the stock banjo on the 9A ? Greetings Mike;? If the gears were for a Southbend 9a,b,or c they will work on the banjo that you have. Phillip R. On Wed, Feb 15, 2023 at 12:13 PM mike allen <animal@...> wrote: ???? ??? A bud gave me a set of the metric threading gears for my lathe |
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Re: ER Collet nut
开云体育
I think you got it right, with one caveat: Abom79 was power reversing the spindle
From: [email protected] <[email protected]> on behalf of mike allen <animal@...>
Sent: Wednesday, February 15, 2023 1:07 PM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] ER Collet nut ?
On 2/15/2023 10:03 AM, mike a wrote:
??? ??? My thought is to ??? ??? 1 . Make your pass ??? ??? 2. Back the tool out .???? ??? ??? 3. Power the lathe off leaving the halfnut engaged . ?? ???? 4 . Use the hand crank to move the carriage to original starting point? . ??? ??? 5. Rinse , repeat . ??? ??? but I could also just be pounding sand
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