Date   

I have sergent couplers in use on my layout.

Shawn Harrington
 

I would like to find assembly tips and what others are doing.


Re: Couplers

Tim L
 

Steve,

Thanks for that post link back. I stand corrected. I must have missed that post somehow and when Frank had mentioned zinc in another post I took that to mean pure zinc.

Chris,

No sarcasm detected. I think your on the right track looking beyond spun cast so early on in the piece, and I think the shapes of anything but the standard and lower shelf E may preclude them from being spun cast easily anyway.

I think Tom is right, the collective might of the minds here can make the couplers being available again happen, it's just taken us awhile to get some steam up.

As for dies (presumably for diecasting), that's a road I wouldn't go down just yet personally. I'd concentrate on the investment cast types (double shelf E, Type F, SF, H etc) and if you do a good job of them Frank may just live up to his statement and sell the dies to you at a price that you can not refuse.

- Tim

On 12/03/2020 11:01, Chris Costello wrote:
I appreciate the history lesson...that may sound sarcastic but it really isn't meant to be.
I'm actually very skeptical that spin casting will work, and not even because of the strength of the pewter.  For that reason I'm already looking beyond spin casting into dies or investment casting...which may help with the existing business anyways.
Keep the information coming...our goal is to make sure we can offer a quality product at a reasonable price.
Chris


Re: Couplers

Chris Costello
 

I appreciate the history lesson...that may sound sarcastic but it really isn't meant to be.  

I'm actually very skeptical that spin casting will work, and not even because of the strength of the pewter.  For that reason I'm already looking beyond spin casting into dies or investment casting...which may help with the existing business anyways. 

Keep the information coming...our goal is to make sure we can offer a quality product at a reasonable price.

Chris

Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: "Tom Colasurdo via Groups.Io" <t_colasurdo@...>
Date: 3/11/20 7:41 PM (GMT-05:00)
To: "SergentEngineering@groups.io" <sergentengineering@groups.io>, SergentEngineering@groups.io
Subject: Re: [Sergent Engineering] Couplers

Should have mention Frank and I were only discussing the material utilized in the latest versions of his couplers ... not the original couplers.  I defer to anyone with that knowledge ...

V/r,
Tom C.



On Wednesday, March 11, 2020, 07:29:57 PM EDT, Tom Colasurdo via Groups.Io <t_colasurdo@...> wrote:


Thank you Steve ... this Group has been so friendly and helpful that I don't want to see any strife created ... we all have the same goal of keeping Frank's amazing couplers available for those that choose to utilize on their models.  Sharing our collective knowledge and experiences of these couplers will certainly help move this effort forward ... even if we have different portions or conflicting information ... all part of the journey.

I stand by that post ... if necessary I can dig out and post the complete e-mail; but rest assured, all I did was parrot the information I received by copying and pasting (least amount of effort) from the e-mail I received from Frank.

That being said, I have no problem with exploring suitable materials ... I'm just hoping we solve the problem at hand - making Frank's amazing couplers available again in a material that meets the needs of those of us that operate our models.

Have a great day.

V/r,
Tom C.


On Wednesday, March 11, 2020, 01:43:54 PM EDT, Steve Wintner via Groups.Io <steve_wintner@...> wrote:


https://groups.io/g/SergentEngineering/message/1962


Frank uses a Zinc alloy, per that post.

Steve


On Wed, Mar 11, 2020 at 6:32, Tim L
<tim@...> wrote:
Franks original couplers were cast in pewter. No bad reflection on Frank
as it's how he started and you have to start somewhere but the couplers
were just ...a pain to work with and the strength of the parts dubious
and I gave up on them in pretty short order (I still have a fresh
unopened pack of them, do we have a Sergent museum anywhere?). I came
back to them once Frank had started doing them diecast and investment
cast in zinc (Frank uses pure zinc from memory, not zamac which is an
alloy of zinc and aluminium).

I'm not trying to discourage you from trying to do them spun cast in
pewter, just giving you the history that we've been there before so you
can make a better informed judgement on your business planning.

- Tim

On 11/03/2020 21:41, Chris wrote:
> I figured I should add in here since I am the other one "talking to a
> company"...I shared with Andrew but figured we are far enough along I
> can share a bit more publicly...although I won't say what company yet,
> my brother and I are in the process of buying another company.  They
> currently do most of their work with spin casting, which I fear is not
> going to be dimensionally stable enough or produce a clean enough cast,
> but I am going to try it once we get things set up (mid to late April). 
> If we can get the parts casting reliably and consistent, then we will go
> that route, however we are looking at getting in to investment casting
> as well.  The success (or failure) with spin casting the couplers will
> drive how quickly we get into investment casting, however we have talked
> and we would really like to add sergent compatible couplers to our
> catalog so it will be one of the first new products we work on releasing.
>
> Anything we produce will either be done in the pewter that is currently
> being used in the spin casting process or zamak (which I seem to
> remember is what Frank is currently using).
>
> Chris Costello




Re: Couplers

Chris Costello
 

I appreciate the history lesson...that may sound sarcastic but it really isn't meant to be.  

I'm actually very skeptical that spin casting will work, and not even because of the strength of the pewter.  For that reason I'm already looking beyond spin casting into dies or investment casting...which may help with the existing business anyways. 

Keep the information coming...our goal is to make sure we can offer a quality product at a reasonable price.

Chris

Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: "Tom Colasurdo via Groups.Io" <t_colasurdo@...>
Date: 3/11/20 7:41 PM (GMT-05:00)
To: "SergentEngineering@groups.io" <sergentengineering@groups.io>, SergentEngineering@groups.io
Subject: Re: [Sergent Engineering] Couplers

Should have mention Frank and I were only discussing the material utilized in the latest versions of his couplers ... not the original couplers.  I defer to anyone with that knowledge ...

V/r,
Tom C.



On Wednesday, March 11, 2020, 07:29:57 PM EDT, Tom Colasurdo via Groups.Io <t_colasurdo@...> wrote:


Thank you Steve ... this Group has been so friendly and helpful that I don't want to see any strife created ... we all have the same goal of keeping Frank's amazing couplers available for those that choose to utilize on their models.  Sharing our collective knowledge and experiences of these couplers will certainly help move this effort forward ... even if we have different portions or conflicting information ... all part of the journey.

I stand by that post ... if necessary I can dig out and post the complete e-mail; but rest assured, all I did was parrot the information I received by copying and pasting (least amount of effort) from the e-mail I received from Frank.

That being said, I have no problem with exploring suitable materials ... I'm just hoping we solve the problem at hand - making Frank's amazing couplers available again in a material that meets the needs of those of us that operate our models.

Have a great day.

V/r,
Tom C.


On Wednesday, March 11, 2020, 01:43:54 PM EDT, Steve Wintner via Groups.Io <steve_wintner@...> wrote:


https://groups.io/g/SergentEngineering/message/1962


Frank uses a Zinc alloy, per that post.

Steve


On Wed, Mar 11, 2020 at 6:32, Tim L
<tim@...> wrote:
Franks original couplers were cast in pewter. No bad reflection on Frank
as it's how he started and you have to start somewhere but the couplers
were just ...a pain to work with and the strength of the parts dubious
and I gave up on them in pretty short order (I still have a fresh
unopened pack of them, do we have a Sergent museum anywhere?). I came
back to them once Frank had started doing them diecast and investment
cast in zinc (Frank uses pure zinc from memory, not zamac which is an
alloy of zinc and aluminium).

I'm not trying to discourage you from trying to do them spun cast in
pewter, just giving you the history that we've been there before so you
can make a better informed judgement on your business planning.

- Tim

On 11/03/2020 21:41, Chris wrote:
> I figured I should add in here since I am the other one "talking to a
> company"...I shared with Andrew but figured we are far enough along I
> can share a bit more publicly...although I won't say what company yet,
> my brother and I are in the process of buying another company.  They
> currently do most of their work with spin casting, which I fear is not
> going to be dimensionally stable enough or produce a clean enough cast,
> but I am going to try it once we get things set up (mid to late April). 
> If we can get the parts casting reliably and consistent, then we will go
> that route, however we are looking at getting in to investment casting
> as well.  The success (or failure) with spin casting the couplers will
> drive how quickly we get into investment casting, however we have talked
> and we would really like to add sergent compatible couplers to our
> catalog so it will be one of the first new products we work on releasing.
>
> Anything we produce will either be done in the pewter that is currently
> being used in the spin casting process or zamak (which I seem to
> remember is what Frank is currently using).
>
> Chris Costello




Re: Couplers

Tom Colasurdo
 

Should have mention Frank and I were only discussing the material utilized in the latest versions of his couplers ... not the original couplers.  I defer to anyone with that knowledge ...

V/r,
Tom C.



On Wednesday, March 11, 2020, 07:29:57 PM EDT, Tom Colasurdo via Groups.Io <t_colasurdo@...> wrote:


Thank you Steve ... this Group has been so friendly and helpful that I don't want to see any strife created ... we all have the same goal of keeping Frank's amazing couplers available for those that choose to utilize on their models.  Sharing our collective knowledge and experiences of these couplers will certainly help move this effort forward ... even if we have different portions or conflicting information ... all part of the journey.

I stand by that post ... if necessary I can dig out and post the complete e-mail; but rest assured, all I did was parrot the information I received by copying and pasting (least amount of effort) from the e-mail I received from Frank.

That being said, I have no problem with exploring suitable materials ... I'm just hoping we solve the problem at hand - making Frank's amazing couplers available again in a material that meets the needs of those of us that operate our models.

Have a great day.

V/r,
Tom C.


On Wednesday, March 11, 2020, 01:43:54 PM EDT, Steve Wintner via Groups.Io <steve_wintner@...> wrote:


https://groups.io/g/SergentEngineering/message/1962


Frank uses a Zinc alloy, per that post.

Steve


On Wed, Mar 11, 2020 at 6:32, Tim L
<tim@...> wrote:
Franks original couplers were cast in pewter. No bad reflection on Frank
as it's how he started and you have to start somewhere but the couplers
were just ...a pain to work with and the strength of the parts dubious
and I gave up on them in pretty short order (I still have a fresh
unopened pack of them, do we have a Sergent museum anywhere?). I came
back to them once Frank had started doing them diecast and investment
cast in zinc (Frank uses pure zinc from memory, not zamac which is an
alloy of zinc and aluminium).

I'm not trying to discourage you from trying to do them spun cast in
pewter, just giving you the history that we've been there before so you
can make a better informed judgement on your business planning.

- Tim

On 11/03/2020 21:41, Chris wrote:
> I figured I should add in here since I am the other one "talking to a
> company"...I shared with Andrew but figured we are far enough along I
> can share a bit more publicly...although I won't say what company yet,
> my brother and I are in the process of buying another company.  They
> currently do most of their work with spin casting, which I fear is not
> going to be dimensionally stable enough or produce a clean enough cast,
> but I am going to try it once we get things set up (mid to late April). 
> If we can get the parts casting reliably and consistent, then we will go
> that route, however we are looking at getting in to investment casting
> as well.  The success (or failure) with spin casting the couplers will
> drive how quickly we get into investment casting, however we have talked
> and we would really like to add sergent compatible couplers to our
> catalog so it will be one of the first new products we work on releasing.
>
> Anything we produce will either be done in the pewter that is currently
> being used in the spin casting process or zamak (which I seem to
> remember is what Frank is currently using).
>
> Chris Costello




Re: Couplers

Tom Colasurdo
 

Thank you Steve ... this Group has been so friendly and helpful that I don't want to see any strife created ... we all have the same goal of keeping Frank's amazing couplers available for those that choose to utilize on their models.  Sharing our collective knowledge and experiences of these couplers will certainly help move this effort forward ... even if we have different portions or conflicting information ... all part of the journey.

I stand by that post ... if necessary I can dig out and post the complete e-mail; but rest assured, all I did was parrot the information I received by copying and pasting (least amount of effort) from the e-mail I received from Frank.

That being said, I have no problem with exploring suitable materials ... I'm just hoping we solve the problem at hand - making Frank's amazing couplers available again in a material that meets the needs of those of us that operate our models.

Have a great day.

V/r,
Tom C.


On Wednesday, March 11, 2020, 01:43:54 PM EDT, Steve Wintner via Groups.Io <steve_wintner@...> wrote:


https://groups.io/g/SergentEngineering/message/1962


Frank uses a Zinc alloy, per that post.

Steve


On Wed, Mar 11, 2020 at 6:32, Tim L
<tim@...> wrote:
Franks original couplers were cast in pewter. No bad reflection on Frank
as it's how he started and you have to start somewhere but the couplers
were just ...a pain to work with and the strength of the parts dubious
and I gave up on them in pretty short order (I still have a fresh
unopened pack of them, do we have a Sergent museum anywhere?). I came
back to them once Frank had started doing them diecast and investment
cast in zinc (Frank uses pure zinc from memory, not zamac which is an
alloy of zinc and aluminium).

I'm not trying to discourage you from trying to do them spun cast in
pewter, just giving you the history that we've been there before so you
can make a better informed judgement on your business planning.

- Tim

On 11/03/2020 21:41, Chris wrote:
> I figured I should add in here since I am the other one "talking to a
> company"...I shared with Andrew but figured we are far enough along I
> can share a bit more publicly...although I won't say what company yet,
> my brother and I are in the process of buying another company.  They
> currently do most of their work with spin casting, which I fear is not
> going to be dimensionally stable enough or produce a clean enough cast,
> but I am going to try it once we get things set up (mid to late April). 
> If we can get the parts casting reliably and consistent, then we will go
> that route, however we are looking at getting in to investment casting
> as well.  The success (or failure) with spin casting the couplers will
> drive how quickly we get into investment casting, however we have talked
> and we would really like to add sergent compatible couplers to our
> catalog so it will be one of the first new products we work on releasing.
>
> Anything we produce will either be done in the pewter that is currently
> being used in the spin casting process or zamak (which I seem to
> remember is what Frank is currently using).
>
> Chris Costello




Re: Couplers

Steve Wintner
 

https://groups.io/g/SergentEngineering/message/1962


Frank uses a Zinc alloy, per that post.

Steve


On Wed, Mar 11, 2020 at 6:32, Tim L
<tim@...> wrote:
Franks original couplers were cast in pewter. No bad reflection on Frank
as it's how he started and you have to start somewhere but the couplers
were just ...a pain to work with and the strength of the parts dubious
and I gave up on them in pretty short order (I still have a fresh
unopened pack of them, do we have a Sergent museum anywhere?). I came
back to them once Frank had started doing them diecast and investment
cast in zinc (Frank uses pure zinc from memory, not zamac which is an
alloy of zinc and aluminium).

I'm not trying to discourage you from trying to do them spun cast in
pewter, just giving you the history that we've been there before so you
can make a better informed judgement on your business planning.

- Tim

On 11/03/2020 21:41, Chris wrote:
> I figured I should add in here since I am the other one "talking to a
> company"...I shared with Andrew but figured we are far enough along I
> can share a bit more publicly...although I won't say what company yet,
> my brother and I are in the process of buying another company.  They
> currently do most of their work with spin casting, which I fear is not
> going to be dimensionally stable enough or produce a clean enough cast,
> but I am going to try it once we get things set up (mid to late April). 
> If we can get the parts casting reliably and consistent, then we will go
> that route, however we are looking at getting in to investment casting
> as well.  The success (or failure) with spin casting the couplers will
> drive how quickly we get into investment casting, however we have talked
> and we would really like to add sergent compatible couplers to our
> catalog so it will be one of the first new products we work on releasing.
>
> Anything we produce will either be done in the pewter that is currently
> being used in the spin casting process or zamak (which I seem to
> remember is what Frank is currently using).
>
> Chris Costello




Re: Couplers

Tim L
 

Franks original couplers were cast in pewter. No bad reflection on Frank as it's how he started and you have to start somewhere but the couplers were just ...a pain to work with and the strength of the parts dubious and I gave up on them in pretty short order (I still have a fresh unopened pack of them, do we have a Sergent museum anywhere?). I came back to them once Frank had started doing them diecast and investment cast in zinc (Frank uses pure zinc from memory, not zamac which is an alloy of zinc and aluminium).

I'm not trying to discourage you from trying to do them spun cast in pewter, just giving you the history that we've been there before so you can make a better informed judgement on your business planning.

- Tim

On 11/03/2020 21:41, Chris wrote:
I figured I should add in here since I am the other one "talking to a company"...I shared with Andrew but figured we are far enough along I can share a bit more publicly...although I won't say what company yet, my brother and I are in the process of buying another company.  They currently do most of their work with spin casting, which I fear is not going to be dimensionally stable enough or produce a clean enough cast, but I am going to try it once we get things set up (mid to late April). If we can get the parts casting reliably and consistent, then we will go that route, however we are looking at getting in to investment casting as well.  The success (or failure) with spin casting the couplers will drive how quickly we get into investment casting, however we have talked and we would really like to add sergent compatible couplers to our catalog so it will be one of the first new products we work on releasing.
Anything we produce will either be done in the pewter that is currently being used in the spin casting process or zamak (which I seem to remember is what Frank is currently using).
Chris Costello


Re: Couplers

Todd Fisher
 

Chris, 

Awesome to hear! Thanks for sharing that info with us. Hopefully it will all workout well regardless of which process you have to use to make the couplers. 

On Wed, Mar 11, 2020, 9:05 AM James Wall <nsc39dash8@...> wrote:
Chris,

This is great news as I am still in need of F and some H couplers.  I hope you can continue the entire line at some point.

James Wall
Rural Hall, NC


Re: Couplers

James Wall
 

Chris,

This is great news as I am still in need of F and some H couplers.  I hope you can continue the entire line at some point.

James Wall
Rural Hall, NC


Re: Couplers

Chris Costello
 

I figured I should add in here since I am the other one "talking to a company"...I shared with Andrew but figured we are far enough along I can share a bit more publicly...although I won't say what company yet, my brother and I are in the process of buying another company.  They currently do most of their work with spin casting, which I fear is not going to be dimensionally stable enough or produce a clean enough cast, but I am going to try it once we get things set up (mid to late April).  If we can get the parts casting reliably and consistent, then we will go that route, however we are looking at getting in to investment casting as well.  The success (or failure) with spin casting the couplers will drive how quickly we get into investment casting, however we have talked and we would really like to add sergent compatible couplers to our catalog so it will be one of the first new products we work on releasing.

Anything we produce will either be done in the pewter that is currently being used in the spin casting process or zamak (which I seem to remember is what Frank is currently using).

Chris Costello 



Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: Tim L <tim@...>
Date: 3/11/20 12:28 AM (GMT-05:00)
To: SergentEngineering@groups.io
Subject: Re: [Sergent Engineering] Couplers

That looks good Andrew.

On the dimensions being slightly out, do remember that Frank said that
the parts are done for the 3d printer he had (something about a hole
being slightly oblong so the castings come out correctly). The drawings
would probably need to be tweeked slightly for the printer you/the
casting company use and the material (brass vs zinc) the couplers are
cast in (shrinkage rate etc).

On that note zinc would likely be a cheaper material than brass as well.

Following with interest.

- Tim


On 11/03/2020 14:35, Andrew via Groups.Io wrote:
> I have been in contact with Precision Scale myself, although I need to
> touch base again as my last email didn't get a response. On the Facebook
> group Christopher Costello has mentioned there may be a manufacturer
> that is going to pick up the line, but he does not want to reveal who
> that company is yet.
>
> I have found a company that will investment cast these couplers and my
> first test of couplers came in yesterday. Some of the dimensions are
> slightly off, so to assemble I had to drill the knuckle slightly. The
> parts are currently too expensive to be viable, but I am exploring
> options on how to make it cheaper. The coupler has operated flawlessly
> since I assembled the pair, so that is good! Here is a photo showing the
> coupler installed in a ST coil car with a Sergent knuckle.
>
> Inline image
>
> Andrew




Re: Couplers

Todd Fisher
 

Andrew, 

That is awesome hopefully the bugs can be worked out to where they will end up being flawless after production. I too sent an email to precision scale with no response as did several others who were on that comment thread on FB. Those tightlocks look awesome on the coil car, not sure how prototypical you like to be but coil cars do typically use a long shank coupler as they have cushioning devices on them. I definitely need a bunch of type Fs for my RD4 coal train I'm going to model so hopefully that will happen soon too 

On Wed, Mar 11, 2020, 12:27 AM Tim L <tim@...> wrote:
That looks good Andrew.

On the dimensions being slightly out, do remember that Frank said that
the parts are done for the 3d printer he had (something about a hole
being slightly oblong so the castings come out correctly). The drawings
would probably need to be tweeked slightly for the printer you/the
casting company use and the material (brass vs zinc) the couplers are
cast in (shrinkage rate etc).

On that note zinc would likely be a cheaper material than brass as well.

Following with interest.

- Tim


On 11/03/2020 14:35, Andrew via Groups.Io wrote:
> I have been in contact with Precision Scale myself, although I need to
> touch base again as my last email didn't get a response. On the Facebook
> group Christopher Costello has mentioned there may be a manufacturer
> that is going to pick up the line, but he does not want to reveal who
> that company is yet.
>
> I have found a company that will investment cast these couplers and my
> first test of couplers came in yesterday. Some of the dimensions are
> slightly off, so to assemble I had to drill the knuckle slightly. The
> parts are currently too expensive to be viable, but I am exploring
> options on how to make it cheaper. The coupler has operated flawlessly
> since I assembled the pair, so that is good! Here is a photo showing the
> coupler installed in a ST coil car with a Sergent knuckle.
>
> Inline image
>
> Andrew




Re: Couplers

Tim L
 

That looks good Andrew.

On the dimensions being slightly out, do remember that Frank said that the parts are done for the 3d printer he had (something about a hole being slightly oblong so the castings come out correctly). The drawings would probably need to be tweeked slightly for the printer you/the casting company use and the material (brass vs zinc) the couplers are cast in (shrinkage rate etc).

On that note zinc would likely be a cheaper material than brass as well.

Following with interest.

- Tim

On 11/03/2020 14:35, Andrew via Groups.Io wrote:
I have been in contact with Precision Scale myself, although I need to touch base again as my last email didn't get a response. On the Facebook group Christopher Costello has mentioned there may be a manufacturer that is going to pick up the line, but he does not want to reveal who that company is yet.
I have found a company that will investment cast these couplers and my first test of couplers came in yesterday. Some of the dimensions are slightly off, so to assemble I had to drill the knuckle slightly. The parts are currently too expensive to be viable, but I am exploring options on how to make it cheaper. The coupler has operated flawlessly since I assembled the pair, so that is good! Here is a photo showing the coupler installed in a ST coil car with a Sergent knuckle.
Inline image
Andrew


Re: Couplers

Andrew DeKruif
 

I have been in contact with Precision Scale myself, although I need to touch base again as my last email didn't get a response. On the Facebook group Christopher Costello has mentioned there may be a manufacturer that is going to pick up the line, but he does not want to reveal who that company is yet.

I have found a company that will investment cast these couplers and my first test of couplers came in yesterday. Some of the dimensions are slightly off, so to assemble I had to drill the knuckle slightly. The parts are currently too expensive to be viable, but I am exploring options on how to make it cheaper. The coupler has operated flawlessly since I assembled the pair, so that is good! Here is a photo showing the coupler installed in a ST coil car with a Sergent knuckle.

Inline image

Andrew
 


On Tuesday, March 10, 2020, 01:57:27 PM CDT, Todd Fisher <tftrainman1@...> wrote:


Andrew, Frank sometimes may not get emails in his regular folder you may have to send another or see if you can grab his attention on here. I know Frank's had alot of personal life going on and is ready to retire from this aspect of things so hopefully we can find someone to produce these very soon. Heard precision scale was potentially looking at picking them up 


On Tue, Mar 10, 2020, 2:50 PM Andrew via Groups.Io <a15andrew15=yahoo.com@groups.io> wrote:
I had a chance to test the strength of the 3D printed type H couplers I made and the four I tested all fail right around 35 Oz (2.1875 Lbs). For reference, pulling the dead weight of a scaletrains SD40-2 takes 2.8 oz, so you should be able to pull the dead weight of 12 locomotives before the couplers fail. I also got out five Athearn blue box cars with plastic wheels and tested to see how much force is required to pull them. The force required is low enough that my meter didn't register!

The next step is to try a different resin mixture to see if that increases the strength. I am also working with Formlabs to determine the strength of some of their resins to see if it would work to make the couplers.

On another note, has anyone been able to contact Frank recently? I inquired a couple weeks ago about the possibility of buying knuckles and balls from him as separate items as but never heard back.


Re: Couplers

Todd Fisher
 

Andrew, Frank sometimes may not get emails in his regular folder you may have to send another or see if you can grab his attention on here. I know Frank's had alot of personal life going on and is ready to retire from this aspect of things so hopefully we can find someone to produce these very soon. Heard precision scale was potentially looking at picking them up 


On Tue, Mar 10, 2020, 2:50 PM Andrew via Groups.Io <a15andrew15=yahoo.com@groups.io> wrote:
I had a chance to test the strength of the 3D printed type H couplers I made and the four I tested all fail right around 35 Oz (2.1875 Lbs). For reference, pulling the dead weight of a scaletrains SD40-2 takes 2.8 oz, so you should be able to pull the dead weight of 12 locomotives before the couplers fail. I also got out five Athearn blue box cars with plastic wheels and tested to see how much force is required to pull them. The force required is low enough that my meter didn't register!

The next step is to try a different resin mixture to see if that increases the strength. I am also working with Formlabs to determine the strength of some of their resins to see if it would work to make the couplers.

On another note, has anyone been able to contact Frank recently? I inquired a couple weeks ago about the possibility of buying knuckles and balls from him as separate items as but never heard back.


Re: Couplers

Andrew DeKruif
 

I had a chance to test the strength of the 3D printed type H couplers I made and the four I tested all fail right around 35 Oz (2.1875 Lbs). For reference, pulling the dead weight of a scaletrains SD40-2 takes 2.8 oz, so you should be able to pull the dead weight of 12 locomotives before the couplers fail. I also got out five Athearn blue box cars with plastic wheels and tested to see how much force is required to pull them. The force required is low enough that my meter didn't register!

The next step is to try a different resin mixture to see if that increases the strength. I am also working with Formlabs to determine the strength of some of their resins to see if it would work to make the couplers.

On another note, has anyone been able to contact Frank recently? I inquired a couple weeks ago about the possibility of buying knuckles and balls from him as separate items as but never heard back.


Re: Joining Group

George Sebastian Coleman
 

Hi Brian, I’m using HO Sergents on my On3 layout as stand ins for link and pins because the head size is almost the same, so visually a good match. And simplified operation. Like L&Ps operation means being able to reach and see to couple. 


On Mar 9, 2020, at 7:39 PM, va_musher via Groups.Io <va_musher@...> wrote:


I'm a O scale narrow gauge modeler (On3, On2 and On30) wanting to learn more about the use of sergent couplers, their use and compatibility with other brands.

Some of my modeling efforts can be seen here: Modeling Narrow Gauge




Thanks for your consideration,

Brian


Re: Joining Group

Mike Conder
 

Nice stuff Brian!

Mike Conder

On Mon, Mar 9, 2020 at 5:39 PM va_musher via Groups.Io <va_musher=yahoo.com@groups.io> wrote:
I'm a O scale narrow gauge modeler (On3, On2 and On30) wanting to learn more about the use of sergent couplers, their use and compatibility with other brands.

Some of my modeling efforts can be seen here: Modeling Narrow Gauge




Thanks for your consideration,

Brian


Joining Group

va_musher
 

I'm a O scale narrow gauge modeler (On3, On2 and On30) wanting to learn more about the use of sergent couplers, their use and compatibility with other brands.

Some of my modeling efforts can be seen here: Modeling Narrow Gauge




Thanks for your consideration,

Brian


Group membership info

Kevin Rammelsberg
 


Hi, I’m a ho scale model railroader who would like to Join your group to learn more about your products, etc. Also I’m thinking of buying your products for my military veteran model railroad group I’m starting up.

Kevin Rammelsberg
Iraq Veteran (2009-2010)

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