Modern RhB buffer stop
- Thread starter Loco
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Dinas Bryn
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Re: Modern RhB buffer
Hi that looks great I would be interested if you do as I am RhB Les
Keith RhB said:
Hi that looks great I would be interested if you do as I am RhB Les
Loco
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Hi Keith and Les,
Sure, if you want to I can make it available at Shapeways.
I do have a few modifications I`d like to consider making first. This is only a prototype and I am not customed to the production tolerances yet.
1) I had to use a 6 mm drill to open up the gland hole, so the model should be changed accordingly to allow the rod to freely pass through the hole.
2) I had to reduce the diameter of one end of the rod, by clamping the other end in an electrical drill and using a sanding paper. This end has a larger diameter to prevent the rod from tilting when being pushed back and forth inside the hole in the main body (it`s being guided by this end and the hole in the gland at the other end), to push against the spring and also to act as a stopper against the gland preventing the rod from falling out.
3) The main body did fit very good over the rails, there was a slight bend inwards of the body sides which was easy to work with. However, four legs (see position 1 in the dwg) are used as stoppers against sleepers to prevent the buffer unit to be pushed backwards when a loco or wagon is pushed against it, and also to prevent the buffer unit from being pulled up. But there are no stoppers preventing movement forward, so the whole thing can move forward about 15,5 mm which is the distance between two adjacent sleepers. I can add a third set of stoppers prevent this.
4) All four parts should be included in one model with sprues, this will reduce the cost $10-12. I think I can place the sprues at non-visible locations for all parts. The cost for this prototype is about €40, which I think is too expensive.
Also, the over all length of the body is 74 mm and as I had no drawings to work from, only pictures, this might be incorrect. If you or others know the correct length I can easily adjust this.
Sure, if you want to I can make it available at Shapeways.
I do have a few modifications I`d like to consider making first. This is only a prototype and I am not customed to the production tolerances yet.
1) I had to use a 6 mm drill to open up the gland hole, so the model should be changed accordingly to allow the rod to freely pass through the hole.
2) I had to reduce the diameter of one end of the rod, by clamping the other end in an electrical drill and using a sanding paper. This end has a larger diameter to prevent the rod from tilting when being pushed back and forth inside the hole in the main body (it`s being guided by this end and the hole in the gland at the other end), to push against the spring and also to act as a stopper against the gland preventing the rod from falling out.
3) The main body did fit very good over the rails, there was a slight bend inwards of the body sides which was easy to work with. However, four legs (see position 1 in the dwg) are used as stoppers against sleepers to prevent the buffer unit to be pushed backwards when a loco or wagon is pushed against it, and also to prevent the buffer unit from being pulled up. But there are no stoppers preventing movement forward, so the whole thing can move forward about 15,5 mm which is the distance between two adjacent sleepers. I can add a third set of stoppers prevent this.
4) All four parts should be included in one model with sprues, this will reduce the cost $10-12. I think I can place the sprues at non-visible locations for all parts. The cost for this prototype is about €40, which I think is too expensive.
Also, the over all length of the body is 74 mm and as I had no drawings to work from, only pictures, this might be incorrect. If you or others know the correct length I can easily adjust this.
Loco
Registered
Painted prototype:
If you wonder where the gland is, it got lost ???
The material is FD.
An updated version based on a set of excellent pictures from Keith has been made and is available at Shapeways, search for "RhB modern buffer".
The cost is unfortunately high, but that is where 3D printing is today. The parts have no mark-up and the cost is the same I have to pay.
Also, a stop signal which can be attached to the buffer is available, search for "RhB signal".
Loco
If you wonder where the gland is, it got lost ???
The material is FD.
An updated version based on a set of excellent pictures from Keith has been made and is available at Shapeways, search for "RhB modern buffer".
The cost is unfortunately high, but that is where 3D printing is today. The parts have no mark-up and the cost is the same I have to pay.
Also, a stop signal which can be attached to the buffer is available, search for "RhB signal".
Loco
Keith RhB
Registered
Re: Modern RhB buffer
I for one want to thank Loco for all the work he has done. Not only is his workmanship and attention to detail first class, but it's very kind of him to make his designs available on Shapeways at his cost. This kind of action is what really moves this hobby forward in my opinion. It seems a little pricey at first but when you consider the detail and work that goes into it I think it's a fair value--especially for us obsessed RhB fans.
I have ordered the buffer and light unit so I'm really looking forward to it. I think I'll put in an LED and possibly a little function decoder to make the light flash. When I took the pictures of the one in Berguen it wasn't active yet so I'm not sure if it's a steady light or flashing...maybe someone can let us know sometime.
Once again, three cheers for Loco, and here's to looking forward to his next creations in 3D! O0
Keith
I for one want to thank Loco for all the work he has done. Not only is his workmanship and attention to detail first class, but it's very kind of him to make his designs available on Shapeways at his cost. This kind of action is what really moves this hobby forward in my opinion. It seems a little pricey at first but when you consider the detail and work that goes into it I think it's a fair value--especially for us obsessed RhB fans.
I have ordered the buffer and light unit so I'm really looking forward to it. I think I'll put in an LED and possibly a little function decoder to make the light flash. When I took the pictures of the one in Berguen it wasn't active yet so I'm not sure if it's a steady light or flashing...maybe someone can let us know sometime.
Once again, three cheers for Loco, and here's to looking forward to his next creations in 3D! O0
Keith
Loco
Registered
I have found this video from Bergün, but unfortunately the buffer stop is without the signal. The main signal shows red. Bergün is at the very end of the video: https://www.youtube.com/watch?v=K16L8bDf-1o
Keith RhB
Registered
Hi guys,
It took me a while, but I finally finished painting the benches and the buffer. The quality of Loco's design work is obvious when you assemble the parts. For example there are little dowels on the ends of the benches so that the ends fit on perfectly. They are incredibly tiny, yet they slide in so nicely it's amazing. For the buffer stop, you insert a spring, then the plunger, then the flange goes on and holds in the plunger because it has a shoulder on it. Then the little contact cap gets glued on and the plunger goes in and out beautifully. As you can probably tell, I'm really happy with these little items, and although they were a little pricey, the satisfaction you get out of them is worth it in my opinion. O0
It took me a while, but I finally finished painting the benches and the buffer. The quality of Loco's design work is obvious when you assemble the parts. For example there are little dowels on the ends of the benches so that the ends fit on perfectly. They are incredibly tiny, yet they slide in so nicely it's amazing. For the buffer stop, you insert a spring, then the plunger, then the flange goes on and holds in the plunger because it has a shoulder on it. Then the little contact cap gets glued on and the plunger goes in and out beautifully. As you can probably tell, I'm really happy with these little items, and although they were a little pricey, the satisfaction you get out of them is worth it in my opinion. O0
Loco
Registered
The modern RhB buffer stop has been redesigned in order to be able to print it in a cheaper material, the polished White Strong & Flexible (pWSF) material. This material is less than half the price of the Frosted Ultra Detail (FUD) material which the buffer stop was designed for originally as shown in Keith's picture. Link to Shapeways: http://www.shapeways.com/product/F59MBWWWN/rhb-buffer-modern-without-signal?li=search-results-1&optionId=56220813
The picture below shows the buffer stop in the pWSF material. The difference from FUD is that details are rounded off more and the surface is a bit rougher. With a spring inside the buffer stop it works very well and provides a soft stop for the cars being pushed against it. This can be seen in the track plow video in this thread: https://www.gscalecentral.net/index.php?topic=301856.0
The picture below shows the buffer stop in the pWSF material. The difference from FUD is that details are rounded off more and the surface is a bit rougher. With a spring inside the buffer stop it works very well and provides a soft stop for the cars being pushed against it. This can be seen in the track plow video in this thread: https://www.gscalecentral.net/index.php?topic=301856.0
Maybe the manufacturer can help you with a drawing http://www.klosegmbh.de/eng/info_e.html
Greatings Edwin
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