ER40 Collet Chuck alternative thought.
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High Quality 5" 5C Collet Chuck Closer Lathe Plain Back Use 5C Collet.i have adapter plates for 75 to 100 each<br>
www.ebay.com
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Sent: Tuesday, February 14, 2023 9:47 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] ER40 Collet Chuck alternative thought.
On Feb 14, 2023, at 9:57 AM, Andrei <calciu1@...> wrote:
Sent: Tuesday, February 14, 2023 9:47 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] ER40 Collet Chuck alternative thought.Hi,WRT collet chucks for the lathe. I've been planning to make the attached adapter for a while to suit my single tumbler heavy 10. What is stopping me is my inability to cut metric threads so I can use commercially available collet nuts and/or a lack of faith that I can make a collet nut. The design is based off of a 5C collet adapter. (https://www.ebay.com/itm/185766045549?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=g2V2IIY7Qu2&sssrc=2047675&ssuid=67pz0IenSSi&widget_ver=artemis&media=COPY ) This is the variation where I trust the taper to secure the adapter in the spindle similar to a 5C collet adapter. Alternatively, I could use the 5C collet closer to secure the adapter in the spindle, the threading for that is not shown. I figured that I'd machine the external taper between centers and then insert the adapter into the spindle and machine the internal taper, bore and thread for collet nut.Note that the taper is wrong for the heavy 10 spindle per tooling chart, need to adjust before I make.Any thoughts would be appreciated.Erik S.
Here’s another pathway, suggested by many others as well.
Ten years ago, I had no idea how to cut a metric thread on my SB9A.The internet and a single article in HSM magazine convinced me that I could.I learned and fabricated the ER-40 adapter with the M50 x 1.5 thread required for the clamping nut.It remains the most difficult and most satisfying job I’ve done.Consider taking the plunge.
This is what I did. In the end it wasn’t really difficult, just take your time cutting the threads. Those metric thread are very fine. I made the first one for my SB9A, I made a second one when I got my SB13. I also made some ER40 collet blocks while I had the taper attachment adjusted correctly.
BTW, I am a rank amateur with no training besides high school metal shop 40 years ago. You can do it!
On Feb 14, 2023, at 9:57 AM, Andrei <calciu1@...> wrote:
All you need to do is fit a backing plate to it. No threading.
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of Erik S. via groups.io<eriks750@...>
Sent: Tuesday, February 14, 2023 9:47 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] ER40 Collet Chuck alternative thought.Hi,WRT collet chucks for the lathe. I've been planning to make the attached adapter for a while to suit my single tumbler heavy 10. What is stopping me is my inability to cut metric threads so I can use commercially available collet nuts and/or a lack of faith that I can make a collet nut. The design is based off of a 5C collet adapter. (https://www.ebay.com/itm/185766045549?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=g2V2IIY7Qu2&sssrc=2047675&ssuid=67pz0IenSSi&widget_ver=artemis&media=COPY ) This is the variation where I trust the taper to secure the adapter in the spindle similar to a 5C collet adapter. Alternatively, I could use the 5C collet closer to secure the adapter in the spindle, the threading for that is not shown. I figured that I'd machine the external taper between centers and then insert the adapter into the spindle and machine the internal taper, bore and thread for collet nut.Note that the taper is wrong for the heavy 10 spindle per tooling chart, need to adjust before I make.Any thoughts would be appreciated.Erik S.
On Feb 14, 2023, at 10:53 AM, Rick <vwrick@...> wrote:On Tue, Feb 14, 2023 at 10:13 AM, Jack Dinan wrote:
Here’s another pathway, suggested by many others as well.
Ten years ago, I had no idea how to cut a metric thread on my SB9A.The internet and a single article in HSM magazine convinced me that I could.I learned and fabricated the ER-40 adapter with the M50 x 1.5 thread required for the clamping nut.It remains the most difficult and most satisfying job I’ve done.Consider taking the plunge.
This is what I did. In the end it wasn’t really difficult, just take your time cutting the threads. Those metric thread are very fine. I made the first one for my SB9A, I made a second one when I got my SB13. I also made some ER40 collet blocks while I had the taper attachment adjusted correctly.
BTW, I am a rank amateur with no training besides high school metal shop 40 years ago. You can do it!
<71A9A68C-2513-4AB5-8F38-030359CFD07C.jpeg>
On Feb 14, 2023, at 9:57 AM, Andrei <calciu1@...> wrote:
All you need to do is fit a backing plate to it. No threading.
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of Erik S. via groups.io<eriks750@...>
Sent: Tuesday, February 14, 2023 9:47 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] ER40 Collet Chuck alternative thought.Hi,WRT collet chucks for the lathe. I've been planning to make the attached adapter for a while to suit my single tumbler heavy 10. What is stopping me is my inability to cut metric threads so I can use commercially available collet nuts and/or a lack of faith that I can make a collet nut. The design is based off of a 5C collet adapter. (https://www.ebay.com/itm/185766045549?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=g2V2IIY7Qu2&sssrc=2047675&ssuid=67pz0IenSSi&widget_ver=artemis&media=COPY ) This is the variation where I trust the taper to secure the adapter in the spindle similar to a 5C collet adapter. Alternatively, I could use the 5C collet closer to secure the adapter in the spindle, the threading for that is not shown. I figured that I'd machine the external taper between centers and then insert the adapter into the spindle and machine the internal taper, bore and thread for collet nut.Note that the taper is wrong for the heavy 10 spindle per tooling chart, need to adjust before I make.Any thoughts would be appreciated.Erik S.
What is stopping me is my inability to cut metric threadsMy model 34 can cut metric threads - *now*. I 3D printed two sets of
conversion gears and a thread chase dial, rewired it for power reverse,
and metric threads are no longer a problem.
http://www.delorie.com/photos/southbend-lathe/img_3169.htm
http://www.delorie.com/photos/southbend-lathe/img_3133.html
http://www.delorie.com/photos/southbend-lathe/img_3199.html
http://www.delorie.com/photos/southbend-lathe/img_3200.html
If you're not too agressive, plastic gears are sufficient.
"Erik S. via groups.io" <eriks750=verizon.net@groups.io> writes:
> What is stopping me is my inability to cut metric threads
My model 34 can cut metric threads - *now*. I 3D printed two sets of
conversion gears and a thread chase dial, rewired it for power reverse,
and metric threads are no longer a problem.
http://www.delorie.com/photos/southbend-lathe/img_3169.htm
http://www.delorie.com/photos/southbend-lathe/img_3133.html
http://www.delorie.com/photos/southbend-lathe/img_3199.html
http://www.delorie.com/photos/southbend-lathe/img_3200.html
If you're not too agressive, plastic gears are sufficient.
--
I'm honestly not advertising here but one of the reasons I developed my Electronic Lead Screw back in 2008 was so I could do metric threading on my Heavy 10L single lever gearbox.
Since then there are a number of other projects out there called ELS's but actually just Electronic gearing. They put a high count encoder on the spindle with a toothed belt drive pulley to an inexpensive ($30 or so) 800 line encoder. Then they use the encoder counts with a multiply/divide ratio to drive the stepper motor on the lead screw. For metric threads you leave the half nut attached and run the lathe backwards with the tool retracted to return to the start position.
Mine uses a single pulse per rev with a tiny magnet embedded in the spindle clamp ring under the gearbox cover. A sensor creates that 1 PPR and with a stable spindle speed is more than up to the task of making nice threads. No reversing of spindle required. Instead it stops moving the leadscrew. I get prompted to pull the tool out of the work at the END position and then it will move back to the BEGIN position. I'm then prompted to either put the cross slide back in to a deeper position or told how far to increment the compound after putting the cross slide back at zero.
I have a taper attachment on my 10L so I've never bothered adding the cross slide motor to it. One day… If there is a powered cross slide then the entire threading operation is automatic.
https://groups.io/g/E-Leadscrew
John Dammeyer
Sent: February-14-23 6:47 AM
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] ER40 Collet Chuck alternative thought.
Hi,
WRT collet chucks for the lathe. I've been planning to make the attached adapter for a while to suit my single tumbler heavy 10. What is stopping me is my inability to cut metric threads so I can use commercially available collet nuts and/or a lack of faith that I can make a collet nut. The design is based off of a 5C collet adapter. (https://www.ebay.com/itm/185766045549?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=g2V2IIY7Qu2&sssrc=2047675&ssuid=67pz0IenSSi&widget_ver=artemis&media=COPY ) This is the variation where I trust the taper to secure the adapter in the spindle similar to a 5C collet adapter. Alternatively, I could use the 5C collet closer to secure the adapter in the spindle, the threading for that is not shown. I figured that I'd machine the external taper between centers and then insert the adapter into the spindle and machine the internal taper, bore and thread for collet nut.
Note that the taper is wrong for the heavy 10 spindle per tooling chart, need to adjust before I make.
Any thoughts would be appreciated.
Erik S.