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topic: 1503Check Rail Chairs
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posted: 20 May 2011 14:10

from:

David R
 
Hatfield Heath - United Kingdom

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It's only taken me 2 years but the first chairs are now available.  Currently only the 1.0mm flangeway version for Scale7 is available but gauge-widened and Overscale (sorry, O fine) ones will follow.  These products are meant to complement the existing C&L and Exactoscale ranges.

100_200849_060000000.jpg100_200849_060000000.jpg
Somewhat enlarged rendering of the CC or S1C chair.

100_200848_240000000.jpg100_200848_240000000.jpg
What you get for your money; total size is 50 x 26 x 4mm.


Note: they are NOT green but 3D-printed in an almost transparent acrylic; the rendered images above are coloured to show the details.

I'm hoping to get some "real" photos of the product uploaded to the Off The Rails shop this weekend. http://www.shapeways.com/model/92016/check_rail_chairs_1_0mm.html for more details.

Regards
David R

posted: 20 May 2011 14:55

from:

Raymond
 
Bexhill-on-sea - United Kingdom

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They look very usefull and I look forward to the 'oversacle' versions for my own railway.

Regards

Raymond

posted: 20 May 2011 16:03

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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Excellent - eventually I'll need loads! (If you've seen my Windmill Street plans you'll understand why!)

I was told that these would be Exactoscale's next 7mm scale chair, but they'd been having loads of problems with the 4mm version, and they wanted to get those right first.
Last edited on 20 May 2011 16:03 by richard_t
posted: 20 May 2011 17:00

from:

David R
 
Hatfield Heath - United Kingdom

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richard_t wrote:
I was told that these would be Exactoscale's next 7mm scale chair, but they'd been having loads of problems with the 4mm version, and they wanted to get those right first.
When the injection moulded versions become available you will then have a choice as my understanding is that the Exactoscale ones will be of GWR design.  However, they are unlikely to be doing the L1CC variants which are somewhere near the top of my to-do-list, along with 100-plus other chairs needed for the two S7 layouts that I'm currently involved with.

Regards
David R

posted: 20 May 2011 21:05

from:

Phil O
 
Plymouth - United Kingdom

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David R wrote:

richard_t wrote:
I was told that these would be Exactoscale's next 7mm scale chair, but they'd been having loads of problems with the 4mm version, and they wanted to get those right first.
When the injection moulded versions become available you will then have a choice as my understanding is that the Exactoscale ones will be of GWR design.  However, they are unlikely to be doing the L1CC variants which are somewhere near the top of my to-do-list, along with 100-plus other chairs needed for the two S7 layouts that I'm currently involved with.

Regards
David R
What about the flare chairs at each end of the check? or is it the intention just to pare a bit off the jaw.



Cheers Phil

posted: 21 May 2011 19:19

from:

David R
 
Hatfield Heath - United Kingdom

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Phil O wrote:
What about the flare chairs at each end of the check? or is it the intention just to pare a bit off the jaw.
Each "sprue" comprises 8 CC, 2 CCR and 2 CCL chairs (a.k.a. S1C, S1CR and S1CL).  These are shown on the 2nd image in the original posting.

It's almost impossible to photograph the transparent acrylic so I had to make up a short section of track and apply some paint.

100_211351_270000000.jpg100_211351_270000000.jpg
The S1 chairs are C&L 3-bolt; the ballast is Slaters "Fine" (the bag is priced 84p so it may have been in my box for a while!); the ash is by C&L with a few bits of greenery by Woodland Scenics.

100_211351_510000000.jpg100_211351_510000000.jpg
From left-to-right: CCR chair and 3 CC chairs.  The CCL chair was out of focus so had to be cropped from this view.

100_211352_260000000.jpg100_211352_260000000.jpg
From left-to-right: CC chair and CCL chair.  You can just see some banding from the 3D-printing process in this enlarged image but the chairs are only approx 11½mm by 4½mm so this is not visible to the unaided eye.

There are also some buffer stops which are suitable for all of the 7mm/ft gauges, fine and scale,
http://www.shapeways.com/shops/otr?section=Buffer+Stops but that's probably another thread!

Regards
David R

posted: 21 May 2011 22:19

from:

Brian McK
 
 

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David,

I'm not up to speed with Shapeways materials and resolution currently attainable. Your renderings of check rail chairs are excellent and the end modelled result looks good - and much better than some early Shapeways production.

With your experience of different items and materials, can you suggest best ways of using this process especially in regard to achieving maximum resolution?

Thanks,
Brian McKenzie

posted: 24 May 2011 13:47

from:

David R
 
Hatfield Heath - United Kingdom

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Brian McK wrote:
... can you suggest best ways of using this process especially in regard to achieving maximum resolution?
Resolution isn't everything: wall-thickness, detail-size, surface-finish, material strength and cost are also important design considerations.  So rather than "maximum resolution" you may need to be considering "adequate resolution" in combination with the other material properties.  A comparison of the Shapeways materials is here: http://www.shapeways.com/materials/material-options

Every page of the Shapeways' web-site has links at the bottom to a number of useful areas.  Start by reading everything (at least once) under the Support heading then browse the Community and Gallery areas to see what everybody else is doing.  There are also a number of threads on RMWeb at the moment. Oh, and you will need to be fairly competent on your chosen 3D drawing/modelling software.

Remember that Shapeways aren't the only players in town.  I did find a company who would 3d-print my check rail chairs in wax, produce a mould and lost wax cast them for me.  Unfortunately the only metals they cast were silver, gold and platinum which made the chairs somewhat expensive -- but at very high resolution!

Regards
David R
http://www.shapeways.com/shops/otr
Last edited on 24 May 2011 13:49 by David R
posted: 31 Oct 2011 15:23

from:

David R
 
Hatfield Heath - United Kingdom

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I am pleased to announce that the 1.75mm check-rail chairs for O-finescale are now available from Off The Rails at http://www.shapeways.com/shops/otr as well as multiple packs of the 1.02mm Scale7 check rail chair.  I am hoping to get the 1.25mm and 1.50mm chairs finished this week (for the 31.X mm gauges and S7 gauge widening).  Please scroll up and see the images posted earlier this year if you've no idea what I'm talking about.

Other turnout chairs are planned but please don't ask for a date, I've got a layout to finish first. 

Although I will need the chairs for the layout so...

Regards
Dave R
Off The Rails http://www.shapeways.com/shops/otr
Last edited on 23 Aug 2014 15:33 by David R
posted: 31 Oct 2011 15:52

from:

Raymond
 
Bexhill-on-sea - United Kingdom

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I am very please to see this, congratulations on what must be a difficult and time consuming job. I imagine you will be getting a great many orders soon including one one from me.

Unless I am mistaken, the 1.50 version should be fine for 31.5mm?
Regards
Raymond

posted: 31 Oct 2011 22:42

from:

David R
 
Hatfield Heath - United Kingdom

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Raymond wrote:
Unless I am mistaken, the 1.50 version should be fine for 31.5mm?
Their primary role was to be for sharp gauge-widened curves in S7 but also be suitable for the 31.Xmm gauges as well.  If you use what seems to be the Slaters' back-to-back dimension of 29.2mm then the 1.25mm check-rail chairs would give you 0.2mm of clearance which isn't much allowance for wheel wobble, moulding pips, slightly misplaced rails or a couple of coats of paint.  Or as happens when I build things, all 4 at once!  The 1.50mm version should increase the clearance to a workable 0.7mm (or 0.5mm at the GOG minimum back-to-back). Perhaps you need a crossing or two from some rail soldered to copperclad sleepers just to try the dimensions out with your wheels.

Regards Dave R
Off The Rails, http://www.shapeways.com/shops/otr 
Last edited on 15 Dec 2011 14:00 by David R
posted: 31 Oct 2011 22:59

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Hi Raymond, David,

The recommended check gauge with the "industry standard" wheelset is 30.0mm.

At 29.2mm B-B that allows an effective flange thickness up to 0.8mm. For older thicker flanges up to 1.2mm thick the B-B can be reduced to 28.8mm minimum (using 31.5mm track gauge).

That means that without any gauge widening:

0-MF 31.5mm track gauge, 1.5mm flangeway gap

0-SF 31.2mm track gauge, 1.2mm flangeway gap (Slater's-type wheels only)

0-XF 31.0mm track gauge, 1.0mm flangeway gap (Slater's-type wheels only)

Generally 0-MF at 31.5mm track gauge is now the preferred option to give good support through V-crossings and still accept a wide range of wheels and reasonable radii.

regards,

Martin.

posted: 1 Nov 2011 08:40

from:

Raymond
 
Bexhill-on-sea - United Kingdom

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Thank you David and Martin for his later reply.  That has settled another question for when I start building track.

Regards

Raymond

posted: 2 Nov 2011 00:36

from:

Ewerthon Mota
 
 

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The company that did offer to you expensive metals is similar to that? http://www.pacificlocomotive.com/

posted: 13 Dec 2011 12:33

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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Hello

I received some of the check rail chairs, and they look very good. Under a lens you can see some of the steps from the process, and a bit of a "wobbly outline" to the base of the chairs. But that's not something you'd see from normal viewing distances.

What glue would you recommend for gluing these chairs to wooden sleepers?

I'm so taken with the process that I'm going to have a go myself - I'm going to start off with the skirted fishplates that don't seem available elsewhere. I just wish the postage (and lets be honest, the whole process) was a tad cheaper!

posted: 13 Dec 2011 14:01

from:

David R
 
Hatfield Heath - United Kingdom

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richard_t wrote:
What glue would you recommend for gluing these chairs to wooden sleepers?

I just used Superglue.  Find a runny variety and let capilliary action draw it underneath the chairs once the rails are held in position with your check-rail-gauges.  If you prefer a little more time for adjustment then try epoxy resin or evostick in "non-impact" mode. 

richard_t wrote:
I just wish the postage (and lets be honest, the whole process) was a tad cheaper!

Compared to the cost of getting plastic moulding tools made it is a tad cheaper!


David R

posted: 13 Dec 2011 14:46

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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Thanks - I don't disagree with the costs compared to moulding tools!

posted: 14 Dec 2011 13:40

from:

David R
 
Hatfield Heath - United Kingdom

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I forgot to mention earlier: you MUST clean the waxy manufacturing coating off before painting or glueing. If you've an ultra-sonic cleaner then give it at least two cleaning cycles, changing the water inbetween. Otherwise hand-hot water with a very small amount of lanolin-free detergent (usually found in a box next to the washing machine!) and a brush.  Then rinse with plain water and keep changing the rinse water until all traces of the wax have disappeared. Regards Dave R, Off The Rails, http://www.shapeways.com/shops/otr
Last edited on 15 Dec 2011 13:58 by David R
posted: 14 Dec 2011 23:03

from:

Alan Turner
 
Dudley - United Kingdom

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David R wrote:

Regards
Dave R, Off The Rails, http://www.shapeways.com/shops/otr


your link returns 404.

 

Alan

posted: 15 Dec 2011 13:57

from:

David R
 
Hatfield Heath - United Kingdom

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Alan Turner wrote:
David R wrote:
Regards Dave R, Off The Rails, http://www.shapeways.com/shops/otr
your link returns 404. Alan
I have just successfully linked to http://www.shapeways.com/shops/otr so I can confirm that Off The Rails shop still works. The problem seems to be that the link returning the 404 error is actually trying to link to .../shops/otrs which has an extra "s" on the end.  I shall try to edit the previous posts to remove this extra character. Thank you for pointing the problem out to me. Regards Dave R Off The Rails http://www.shapeways.com/shops/otr
Last edited on 15 Dec 2011 13:58 by David R
posted: 19 Jan 2012 13:14

from:

David R
 
Hatfield Heath - United Kingdom

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David R wrote on 31st October 2011:
I am hoping to get the 1.25mm and 1.50mm chairs finished this week (for the 31.X mm gauges and S7 gauge widening).  Please scroll up and see the images posted earlier if you've no idea what I'm talking about.
Unfortunately "this week" got stretched to 3 months, but they are now available for those that are interested.  All the available chairs are here http://www.shapeways.com/shops/otr?section=Chairs but please be careful when ordering to ensure that you choose the correct flangeway as many of the products can look very similar on screen.

Regards
Dave R
Off The Rails http://www.shapeways.com/shops/otr


posted: 21 Jan 2012 23:29

from:

GNR(Ireland)
 
Dublin - Ireland

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I have not just got some of the S7 chairs (really good, thanks David), but have joind the Shapeways forum. Really interesting stuff on this site.
Regards,
Derek

posted: 6 Feb 2012 14:20

from:

David R
 
Hatfield Heath - United Kingdom

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This month's new product:

100_060916_000000000.jpg100_060916_000000000.jpg
Based on the LNER NE region designs of 1926 these S1-J chairs would have been used on 12" x 6" timbers either side of fishplated track joints.

7mm scale now available from: http://www.shapeways.com/model/461837/s1_j_joint_chairs.html

Regards David R

posted: 18 Sep 2012 20:37

from:

David R
 
Hatfield Heath - United Kingdom

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The next time somebody asks me why I model Scale7 then I shall direct them to this photo of my LNER 1 in 6 common crossing:
 100_181516_560000000.jpg100_181516_560000000.jpg Yes, there are a few minor constructional blips but these won't there on the next one I build...
 100_181517_380000000.jpg100_181517_380000000.jpg
Track plan by Templot; S1 chairs by C&L; L1 chairs and fish plates by Exactoscale; CCR, CC and CCL chairs by Off The Rails; 6X, 6A, 6B and 6C chairs, knuckle block, wing blocks, cast washers, nuts and bolt heads by me but should be available from Off The Rails within a couple of months once I've made a few minor changes.

No, the crossing chairs won't be available in O Finescale.  And please don't present me with a list of what you want as I'm still near the top of my wish list (120+ chairs still to do at the last count, these four have taken me since last November to get to this stage).
Last edited on 22 Sep 2012 12:31 by David R
posted: 20 Sep 2012 07:39

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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Stunning!

posted: 22 Sep 2012 16:42

from:

David R
 
Hatfield Heath - United Kingdom

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richard_t wrote:
Stunning!

Thank you Richard, it's taken me a long time to get here.  To be fair, the cropped photo does look better than the original model which is only a 6inch square test piece.  Once I've drawn and printed the remainder of the chairs that I need then I can start the layout proper...

Regards David R
Last edited on 22 Sep 2012 16:42 by David R
posted: 17 Feb 2013 17:59

from:

David R
 
Hatfield Heath - United Kingdom

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The latest track items available from Off The Rails are some GER chairs with separate keys.  These were drawn after a local S7 group meeting as some of the members wanted to try them out.  At one stage the chair was to have fixing holes for the spikes and trenails to be inserted: thankfully sanity prevailed.:roll:

100_171246_170000000.jpg100_171246_170000000.jpg


Inserting the keys has been simplified by arranging the sprue so that the key can be fitted before detaching it.

100_171248_300000000.jpg100_171248_300000000.jpg
Sorry about the depth of field.  The rail is an 1/8" tall so shown somewhat larger than full size here.

Now available from http://www.shapeways.com/model/832355 but as the cost is over 20p per chair :shock: I don't expect to see many models of Liverpool Street built with them!

posted: 9 Mar 2013 00:59

from:

Ian Allen
 
Milton Keynes - United Kingdom

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Oh my giddy aunt ! I'm so glad you haven't gone the O-MF route with these products, I'd be having a field day and spending too much of the groups money, especially if they were applicable to the Southern.

Ian

posted: 9 Mar 2013 10:05

from:

David R
 
Hatfield Heath - United Kingdom

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Ian Allen wrote:
Oh my giddy aunt ! I'm so glad you haven't gone the O-MF route with these products, I'd be having a field day and spending too much of the groups money, especially if they were applicable to the Southern.
Ian,

The big three's standard designs all looked fairly similar; it was just the little GWR that carried on doing it's own thing.  So you could use Off The Rails products for a Southern layout...

http://www.shapeways.com/shops/otr?section=Chairs The check-rail chairs are available with a range of flangeways (1.02mm, 1.25mm, 1.50mm and 1.75mm) for the different 7mm scale gauges. The plain chairs can be used for any 7mm gauge  alongside the C&L and Exactoscale offerings. The crossing chairs are a different kettle of fish as non-scale (i.e. non-S7) involves re-designing all the chairs from scratch; but you could use bits of them cosmetically.

Regards
Dave R
Off The Rails http://www.shapeways.com/shops/otr
Last edited on 9 Mar 2013 10:06 by David R
posted: 13 Jul 2014 19:06

from:

David R
 
Hatfield Heath - United Kingdom

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You wait ages for a chair and then 3 come along at once...

Well, only one in this post.  You'll have to wait for the others.
100_131349_560000000.jpg100_131349_560000000.jpg
The 7mm scale LNER P1 slide chair is now available in packs of 20 and 100.  Note the hole in the jaw for the stud bolt (lots of spare stud bolts included on the sprue!) which should be inserted through a hole drilled in the stock rail.
100_131353_300000000.jpg100_131353_300000000.jpg
This is the first in a series of chairs which will eventually comprise all the components needed for a pair of switches.

A couple of photos of the initial test print; my apologies for the (lack of) depth of field:
100_131354_380000000.jpg100_131354_380000000.jpg  100_131354_150000000.jpg100_131354_150000000.jpg

Regards Dave R
Off The Rails
Last edited on 13 Jul 2014 19:09 by David R
posted: 18 Nov 2014 14:12

from:

David R
 
Hatfield Heath - United Kingdom

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Latest addition to the Off The Rails shop:
100_180908_250000000.jpg100_180908_250000000.jpg


100_180908_580000000.jpg100_180908_580000000.jpg
It's a non-functional GWR "slab & bracket" BC7 chair kit (that's a 7A chair for the rest of us). The slab is in two parts which can be trimmed back to suit flangeways from 1.75mm downwards; the holding down saddle (spares included!) may also need some fettling to clear overscale flanges.

100_180909_160000000.jpg100_180909_160000000.jpg
The jaws can also be filed to suit other angles of crossing, just like the no-longer-available whitemetal product from C&L.

Available 3d-printed in acrylic, brass or platinum...

Regards
David R

Last edited on 18 Nov 2014 14:13 by David R


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