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
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mike allen
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#107299
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Re: ER Collet nut
??? ??? 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
By
mike allen
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#107298
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Re: ER Collet nut
??? ??? ??? I believe if you have a hand crank on the outboard spindle
it will work , but I will not be able to test that theory for a couple 3
weeks..
??? ??? animal
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mike allen
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#107297
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Re: ER Collet nut
??? ??? If your threading SLOW that would be a good time to have a
crank on the outboard end of the spindle????? . That will probably be my
MO when I attack this project . I'm hoping to
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mike allen
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#107296
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Re: ER Collet nut
Yup,
You are right. I just re-watched this video from Abom79. He does the metric threading on his imperial lathe, starting at minute 11:40.
He does start at the same number (1 in his case, with the
By
Andrei
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#107295
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Re: ER Collet nut
There are 5/8¡± 3C collets. They are NOT through collets. They will accept work 1¡± deep however.
Jim B,
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Jim_B
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#107294
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Re: ER Collet nut
Too bad it isn't true.
allan
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m. allan noah <kitno455@...>
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#107293
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Re: ER Collet nut
I think what makes my idea work is I have the 10k lathe with the 6k collet allowing me to put on a chuck. I don't think you can do that with other lathes.
--
Bill From Socal
By
William Nelson
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#107292
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Re: ER Collet nut
Well that would have been the tricky part. I would have put in my 5/8" 6k collet. I'm able to put my 3 or 4 jaw chucks over that. Install a 5/8 ground rod in the collet block and tighten well. Insert
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William Nelson
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#107291
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Re: ER Collet nut
Yes, that is the plan, anyway. ?
________________________________
Sent: Wednesday, February 15, 2023 11:49 AM
To: [email protected] <[email protected]>
Subject: Re: [SouthBendLathe]
By
Andrei
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#107290
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Re: ER Collet nut
Are you saying you can just disengage the half nut, hand crank the carriage back, and restart on the same number?
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Rick
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#107289
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Re: ER Collet nut
I thought about this, but how would you indicate it in so as to minimize runout? ?The taper would be facing the chuck, so you couldn¡¯t indicate it on that, maybe on the relief cut?
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Rick
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#107288
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Re: ER Collet nut
The only difference between metric and imperial on using threading dial is that with metric you have to start ON THE SAME mark, every time.
________________________________
Sent: Wednesday, February
By
Andrei
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#107287
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Re: ER Collet nut
I had that idea a while ago as I had some parts to make that would have been easier to leave in the chuck and go back and forth to the lathe and mill. I considered using carbide tooling to thread a
By
William Nelson
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#107286
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Re: ER Collet nut
I made an ER32 collet chuck for my Atlas 618 several years ago and love the ER system.? I turned this one from piece of round stock, threaded the inside for lathe spindle, outside for purchased ER
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Dallas
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#107285
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Re: New member seeking info on my 3 Jaw Chuck
My SB9 was built in 1936; it uses a 1-1/2x8 spindle thread.
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Ken Powell
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#107284
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Re: ER Collet nut
I don't know about the collet chuck drawing, but I provided that threading
info a few years ago. Glad to see someone making use of it.
When threading, I use the same method DJ showed, so I can use a
By
m. allan noah <kitno455@...>
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#107283
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Re: ER Collet nut
Here is a picture of the one for my SB13. Note the relief groove, plenty of room for the spindle to park.
This is a schematic I found on the internet, it is what I used to make mine. I don¡¯t know
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Rick
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#107282
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Re: ER Collet nut
The spindle stops in the relief groove. Therefore, no variation in the thread.
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Rick
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#107281
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Re: ER Collet nut
I¡¯ll concede that he is using the threading dial, but not how one would normally use it. What he is doing seems like a lot more work, for what advantage? I think he is just introducing another
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Rick
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#107280
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