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A Sergent assembly jig for long and short EC87's

Edward Sutorik
 

I recently assembled my first EC87's using Sergent's assembly fixture.


I also wanted to have some of the short and long versions of these, and I preferred using an assembly fixture instead of, well, whatever.


So, I made a variable assembly fixture.


There are photos in the Photos section under "Sergent variable assembly fixture".   There is a photo of it set up with an EC87+130 ready to build, and some assembled couplers above.  And there is another shot of the fixture in pieces.


I attached one of Sergent's assembly fixtures to a strip of Evergreen .250 x .500 with four 0-80 flat head screws.  I then cut the assembly in half with a razor saw.  These two pieces will fit in the base, which is .250 x .500 with a back of .125 x .375 set vertically and glued on.


.040" has to be removed from the gap between the two pieces of the former fixture.  The razor saw I used removes .023", so there's a bit of filing to do.  Ideally, you take off just enough so that the fixture will accept an EC87-040 coupler when the pieces are jammed together.  It probably doesn't really matter, though.  You could probably clamp one side, install the other side loose, and the join them with the EC87-040.  And then clamp the other piece.


I made some spacers to set up the fixture to do both the EC87+100 and the EC87+130.  You can see them in the photo.  Again, you probably don't need them, as you could do your setup the same way as with the EC87-040.


Ed


Edward Sutorik



Re: [SergentEng] Re: Coupler boxes ... more info

Edward Sutorik
 

As my just posted topic of assembling different lengths of the EC87 would imply, there are times a person has to or wants to use the "compatible" shank couplers.  The long shank cushion-style comes to mind.  The narrow couplers only come in one length.  Plus, I'm not going to necessarily be in the mood to change out coupler boxes in a RTR car.

It's my intent to use whatever version of Sergent works for a particular job.

Ed

Edward Sutorik


Re: [SergentEng] Re: Coupler boxes ... more info

John Degnan
 

Molded-on, 'proprietary' draft gear boxes are why Sergent offers a "compatable" shank coupler.  But you have to remember that not all models come with molded-on boxes.  Take Stewart Hobbies/Bowser models, for instance... all they have is a mounting pad for mounting a draft gear box.  I my overly-exhalted opinion, this SHOULD be the industry standard way for ALL models to come.  But getting that to become a standardized (NMRA?) reality will be near impossible.  But it would lessen the cost of design for manufacturers, so I fail to see why they wouldn't welcome the idea with open arms.

Regardless... I'm sure Sergent will eventually offer the "narrow" shank couplers in various lengths, so just give Frank time to get it all done.  I waited almost 4 YEARS (or was it 5?) for the advent of the S scale coupler!

As for me... I would GLADLY swap out ALL molded-on draft gear boxes on every model I have in favor of a scale-sized draft gear box instead... if I just had time to do so.  The reward would be the results!


John Degnan


From: "Edwardsutorik@... [SergentEng]"
To: SergentEng@...
Sent: Saturday, November 18, 2017 4:31:25 PM
Subject: RE: [SergentEng] Re: Coupler boxes ... more info

 

As my just posted topic of assembling different lengths of the EC87 would imply, there are times a person has to or wants to use the "compatible" shank couplers.  The long shank cushion-style comes to mind.  The narrow couplers only come in one length.  Plus, I'm not going to necessarily be in the mood to change out coupler boxes in a RTR car.


It's my intent to use whatever version of Sergent works for a particular job.

Ed

Edward Sutorik



New coupler box update

Jim King
 

My last email stated that I would have some more info re: a new project that John Degnan and I are working on “after Thanksgiving”.  Well, it’s now “after” but we’re not ready to release a new product just yet.  We are still evaluating options that, depending on the selected “best” method, will dictate more design changes.

 

I am willing to add another piece to the tease:  the project is a self-centering device for Frank’s superb narrow shank coupler using a drop-in replacement draft gear box for Accurail users.  No details on what the final springing mechanism will look like because we haven’t tested all options, including sourcing materials.  The goal is simple:  if you desire centering, remove the Accurail boxes now installed on your rolling stock, re-use Frank’s coupler in the new box, add the to-be-finalized spring and reassemble using the same screws and hole locations.  The box and lid will be cast in black urethane to eliminate basic painting … just weather to your liking and that’s it.  Suffice to say that the final product will be a stock item so you won’t have to concern yourself about needing-and-not-being-able-to-get issues again.

 

The next email on this topic will include an isometric, exploded view of the CAD assembly.  I don’t know when that will be … I can only tell you that we are working on several prototypes with much anticipation for a great product that resolves the lack-of-centering issue.  When we’re satisfied it’s the best we can offer using available material in the limited box space dictated by the narrow shank, that’s what I’ll produce.

 

Jim King

(828) 777-5619

www.smokymountainmodelworks.com

 

Coupler boxes?

Michael Graff
 

Hi all!
I have converted almost all of my HOn3 to Sergent couplers.
But, where can I buy the draft gear boxes?
I looked at the Sergent page, but couldn't see any?

Re: Coupler boxes?

Michael Graff
 

I know the Accurail are no more. But is there any way to mount the Sergent now?
I wonder if anyone has a cad file on the Accurail to share?

Re: [SergentEng] Re: Coupler boxes?

Robert Margerum
 

Try accurail but they are probably out of stock


On Dec 6, 2017, at 12:06 PM, michael.graff@... [SergentEng] <SergentEng@...> wrote:

 

I know the Accurail are no more. But is there any way to mount the Sergent now?
I wonder if anyone has a cad file on the Accurail to share?

Re: [SergentEng] Coupler boxes?

Jeff Young
 

Hi Michael,

How many do you need? I bought 25 sets (the minimum quantity) a while back, but only need 10 or so.

Cheers,
Jeff.

Re: [SergentEng] Coupler boxes?

George
 

They are still listed on the Accurail web site.

George Sebastian-Coleman



On Dec 6, 2017, at 12:06 PM, michael.graff@... [SergentEng] <SergentEng@...> wrote:

I know the Accurail are no more. But is there any way to mount the Sergent now?
I wonder if anyone has a cad file on the Accurail to share?

__._,_.

Re: [SergentEng] Coupler boxes?

Mark Lewis
 

This announcement was posted Nov. 17, 2017 on the Sergent Engineering Coupler Users Facebook group page:


"NEW PRODUCT ANNOUNCEMENT : Jim King of Smoky Mountain Model Works (and myself) have come up with a design for a “drop in” replacement for the long-out-of-stock Accurail scale-sized draft gear box that Sergent used to sell with his EN87 couplers... but our new box adds certain details and a special (optional) feature that might make a LOT of users happy. I won’t go into further detail at this time because testing isn’t finished and the CAD files not started, but we do have 2 working prototypes of the new box. Give Jim until just after Thanksgiving to finalize the design, work up pricing and upload a CAD image to Jim's web site. When it’s ready to launch, I’ll update everyone with all the info you’ll need to place your orders".

There has been no further information posted on this, but it sounds promising.

Mark Lewis
Stony Point, NC

Re: [SergentEng] Re: Coupler boxes?

John Degnan
 

A (better and more detailed) replacement for the Accurail box is coming soon from another manufacturer.  Hang in there.



John D

Scaler164@...


On December 6, 2017 at 12:06 PM "michael.graff@... [SergentEng]" <SergentEng@...> wrote:

 

I know the Accurail are no more. But is there any way to mount the Sergent now?
I wonder if anyone has a cad file on the Accurail to share?


 

Re: [SergentEng] Re: Coupler boxes?

Alan Hummel
 

I have a different problem,I believe as I have Intermountain corn syrup tankers from years ago with Accurail draft boxes but I need narrow shank SE couplers to fit these boxes,and am told Kadee style boxes won't fit on these tankers. Any ideas besides get rid of the tankers.



On Wednesday, December 6, 2017 1:00 PM, "ROBERT MARGERUM robmar@... [SergentEng]" wrote:


 
Try accurail but they are probably out of stock


On Dec 6, 2017, at 12:06 PM, michael.graff@... [SergentEng] <SergentEng@...> wrote:

 
I know the Accurail are no more. But is there any way to mount the Sergent now?
I wonder if anyone has a cad file on the Accurail to share?


Re: [SergentEng] Re: Coupler boxes?

jzook@...
 

While we're all anxiously awaiting the arrival of the new draft gear boxes to replace the Accurail version, has anyone tried the Precision Scale draft gearbox, part# 32025.  PSC describes this draft gear box as a replacement to the standard Kadee #714 draft gear box.  I know with a little reaming of the Sharon shank, the Sharons will fit into the Kadee 714 draft gear box.  That makes me think the Sharon will also fit into PSC's draft gear box.

Thoughts always appreciated.

Jon

Re: [SergentEng] Re: Coupler boxes?

John Degnan
 

I'm not sure I follow what you're saying... is the problem the draft gear box or the coupler?  What are you trying to do - install a coupler in the existing gear box or replace the entire gear box?  If the Sergent EN (narrow shank) coupler will fit in the stock gear box... why replace it?  If it won't fit, figure out why, then rectify the issue(s) then install the EN Sergent coupler of your choice.


If you can take and post pictures of the gear box on your model, surely someone here will be able to help you figure out a solution.



John Degnan

Scaler164@...



On December 7, 2017 at 11:48 AM "Alan Hummel ahummel72@... [SergentEng]" <SergentEng@...> wrote:

I have a different problem,I believe as I have Intermountain corn syrup tankers from years ago with Accurail draft boxes but I need narrow shank SE couplers to fit these boxes,and am told Kadee style boxes won't fit on these tankers. Any ideas besides get rid of the tankers.

Re: [SergentEng] Re: Coupler boxes?

Michael Graff
 

I don't have any draft gear boxes...
They aren't included in the car kits nor on the brass locomotives.
I have used the Accurail boxes, but as they aren't available I had to ask if there's another option available.
I have fortunately gotten a bunch of Accurail boxes now from a member here. 

På tors, dec. 2017 klockan 23:04, John Degnan Scaler164@... [SergentEng]
skrev:
 

I'm not sure I follow what you're saying... is the problem the draft gear box or the coupler?  What are you trying to do - install a coupler in the existing gear box or replace the entire gear box?  If the Sergent EN (narrow shank) coupler will fit in the stock gear box... why replace it?  If it won't fit, figure out why, then rectify the issue(s) then install the EN Sergent coupler of your choice.


If you can take and post pictures of the gear box on your model, surely someone here will be able to help you figure out a solution.



John Degnan

Scaler164@...



On December 7, 2017 at 11:48 AM "Alan Hummel ahummel72@... [SergentEng]" wrote:

I have a different problem,I believe as I have Intermountain corn syrup tankers from years ago with Accurail draft boxes but I need narrow shank SE couplers to fit these boxes,and am told Kadee style boxes won't fit on these tankers. Any ideas besides get rid of the tankers.

Re: [SergentEng] Re: Coupler boxes?

John Degnan
 

Ok, I see.  Well... if you need any more, a replacement draft gear box will be available soon.... likely before the end of this month.



John D

Scaler164@...


On December 7, 2017 at 5:50 PM "Michael Graff michael.graff@... [SergentEng]" <SergentEng@...> wrote:

 

I don't have any draft gear boxes...

They aren't included in the car kits nor on the brass locomotives.
I have used the Accurail boxes, but as they aren't available I had to ask if there's another option available.
I have fortunately gotten a bunch of Accurail boxes now from a member here. 
Regards Michael.


På tors, dec. 2017 klockan 23:04, John Degnan Scaler164@... [SergentEng]
<SergentEng@...> skrev:
 

 

I'm not sure I follow what you're saying... is the problem the draft gear box or the coupler?  What are you trying to do - install a coupler in the existing gear box or replace the entire gear box?  If the Sergent EN (narrow shank) coupler will fit in the stock gear box... why replace it?  If it won't fit, figure out why, then rectify the issue(s) then install the EN Sergent coupler of your choice.


If you can take and post pictures of the gear box on your model, surely someone here will be able to help you figure out a solution.



John Degnan

Scaler164@...



On December 7, 2017 at 11:48 AM "Alan Hummel ahummel72@... [SergentEng]" <SergentEng@...> wrote:

I have a different problem,I believe as I have Intermountain corn syrup tankers from years ago with Accurail draft boxes but I need narrow shank SE couplers to fit these boxes,and am told Kadee style boxes won't fit on these tankers. Any ideas besides get rid of the tankers.
 


 

HOn3 coupler height tool.

Michael Graff
 

Hi all, I made this for my own use to check the coupler height on the Sharon Couplers on my HOn3 equipment.
It also has a platform to check if the cars are ready for coupler box installation.
I made it available on Shapeways if anyone want to try it out.
https://www.shapeways.com/product/STH828QS4/hon3-sergent-coupler-gauge?optionId=64296833&li=shop-inventory
Best regards, Michael Graff.

New coupler boxes coming soon

Jim King
 

In early December, I mentioned that I was designing a new coupler box to replace the hard-to-find Accurail box with the added treat of self-centering.  The design cycle was completed just before Christmas and patterns ordered.  If they are “on time”, I should receive them by next Monday.  Once I make the first rubber mold and some test castings, they will be announced as “in production/ready to sell” (assuming no design/pattern changes are required).  These parts will remain in-stock indefinitely so you won’t have to worry about “needing and not having” for future projects.

 

Stay tuned …

 

Jim King

(828) 777-5619

www.smokymountainmodelworks.com

 

Re: New coupler boxes coming soon

Mark Lewis
 

Jim:

Looking forward to the announcement.

Mark Lewis
Stony Point, NC

Re: [SergentEng] New coupler boxes coming soon

Scott Walton
 

Your web page mentions "self-centering". If this means that the coupler automatically returns to the center position, doesn't this do away with one of Sergent;s advantages: the ability to couple on a curve?

Scott Walton

On Wed, Jan 3, 2018 at 2:48 PM, 'Jim King' jimking3@... [SergentEng] <SergentEng@...> wrote:
 

In early December, I mentioned that I was designing a new coupler box to replace the hard-to-find Accurail box with the added treat of self-centering.  The design cycle was completed just before Christmas and patterns ordered.  If they are “on time”, I should receive them by next Monday.  Once I make the first rubber mold and some test castings, they will be announced as “in production/ready to sell” (assuming no design/pattern changes are required).  These parts will remain in-stock indefinitely so you won’t have to worry about “needing and not having” for future projects.

 

Stay tuned …

 

Jim King

(828) 777-5619

www.smokymountainmodelworks.com

 




--
Scott Walton