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    • March 8, 2018 5:49 AM EST
    • Sure

       

    • March 7, 2018 9:56 PM EST
    • David Maynard said:

      I downloaded a drawing for a wheel gauge from the Saskatoon Model Engineers, and it has the back to back at 39.5mm But since I don't set my wheels tight to the back to back, I set my wheels so the flanges fit in the slots and rotate in the gauge freely, my wheels are probably just a smidge under 40mm back to back. It works for me.

      John Bouck said:
      All track is not a perfect 45mm spacing........

      Actually, none of my (commercially made) track is, its all a bit wider. I have found the same to be true in HO. The NMRA track gauge falls between the rails, because its over-gauge too. I wonder if manufacturers do this on purpose (for whatever reason) of if its just that manufacturing tolerances aren't tight enough to get the gauge spot on.

      David

      Is this drawing something you could post?

      Tom

       

    • March 7, 2018 5:01 PM EST
    • I downloaded a drawing for a wheel gauge from the Saskatoon Model Engineers, and it has the back to back at 39.5mm But since I don't set my wheels tight to the back to back, I set my wheels so the flanges fit in the slots and rotate in the gauge freely, my wheels are probably just a smidge under 40mm back to back. It works for me.

      John Bouck said:
      All track is not a perfect 45mm spacing........

      Actually, none of my (commercially made) track is, its all a bit wider. I have found the same to be true in HO. The NMRA track gauge falls between the rails, because its over-gauge too. I wonder if manufacturers do this on purpose (for whatever reason) of if its just that manufacturing tolerances aren't tight enough to get the gauge spot on.

    • March 7, 2018 3:12 PM EST
    • I'm finding that to be true, now that I'm gauging them properly.  The flange is a bit thicker than an Aristo wheel, but the profile is very different.  I may need to modify the gauge to the minimum specified thickness.  Snow day tomorrow, so I'll futz around with it.

    • March 7, 2018 2:46 PM EST
    • Eric, the 40mm is perfect, so I am curious what gauge do you get on the Kadee wheels after that (measure up to, but not on the fillet)...

       

      I have heard the Kadee wheels have really thick flanges, and it was hard to get correct gauge once the back to back of 40mm was set.

       

      Greg

    • March 7, 2018 10:29 AM EST
    • All track is not a perfect 45mm spacing. I have found this to be true on my layout and friends as well. (Even indoors).

      Aluminum is the worse culprit. Especially on the curves.

      The rail head can tip in or out a little.

      The problem is usually fixed after I run my Train Li dual bender to straighten it up.

      You need a little side to side play on the wheel sets. When I build my rolling stock, I always make sure I have a little slop.

      My 2 cents...............

    • March 6, 2018 10:33 PM EST
    • Eric

      That worked. Thank you.

      Tom

       

       

    • March 6, 2018 10:31 PM EST
    • I am not sure of the file type issue, but I AM sure of the file name. This site DOES NOT like spaces in the file name. Looking at the file name there are 2 spaces in the file name. I am also not sure about the extra characters after the file extension .STL. 

    • March 6, 2018 10:22 PM EST
    • Tom:

       

      I had the same problem. I fiddled about a bit and found that if you paste this url into a browser (well at least if you use Chrome), it will download the file:

       

      http://largescalecentral.com/public/ynforum_attach/37/41/02/23cf8_a655.stl?c=4ab3&fc=%27Wheel%20Gauge%20v1.stl%27

       

      Not sure why it isn't working correctly as is.

       

      EDITED: to say that you can just click on that link above and it should download. Magic!

    • March 6, 2018 10:18 PM EST
    • Eric Reuter said:

      Here is a 3D printed tool for gauging wheels.  It's exactly 40 mm wide.  

       

       

      STL file attached.

      Eric

      When I try to download the STL file, I get a page not found error. Is it me or is there something wrong?

      Tom

       

    • March 6, 2018 9:16 PM EST
    • Michael: I understood what you meant.  I'm just not sure how to accomplish it if the axle length isn't predictable, since the distance between the end of the axle and face of the wheel when it's in gauge would be manufacturer specific. 

    • March 6, 2018 9:03 PM EST
    • To clarify - the wheels can still be in gauge but maybe not centered on the axle. 

       

      For the Rooster: Some of us are proactive and want to get it done before a derailment happens and the cars fall and hit the dirt/cement. And.............switches are bitches. 

    • March 6, 2018 8:57 PM EST
    • Michael Kirrene said:

      I'd like to see one gauge block that gauges not only the distance between the insides of the wheel flanges but also gauge the distance between the outside of the wheels and the ends of the axle on both sides. You know, verify that the wheels are centered equidistant on the axle in addition to verifying the distance between the wheels all in one shot? Is that doable, or is 'eyeing' it good enough? I have quite a few Bachmann 92421 31 mm metal wheel sets that I need to check! 

      Interesting idea.  NMRA doesn't have a standard for overall axle length, and I don't know they're all the same (I haven't compared various brands).  Any shape is possible, but I don't know how you'd center it for an arbitrary axle length.

      I'll PM you about sending one.  

    • March 6, 2018 8:52 PM EST
    • Who checks wheel spacing until a derailment?

      I don't

      Nice work Eric

    • March 6, 2018 8:39 PM EST
    • I'd like to see one gauge block that gauges not only the distance between the insides of the wheel flanges but also gauge the distance between the outside of the wheels and the ends of the axle on both sides. You know, verify that the wheels are centered equidistant on the axle in addition to verifying the distance between the wheels all in one shot? Is that doable, or is 'eyeing' it good enough? I have quite a few Bachmann 92421 31 mm metal wheel sets that I need to check! 

       

      Meanwhile, please put me on the list of those who would like to have this tool. Thanks, Eric!

    • March 6, 2018 7:35 PM EST
    • Good point.  The issue I have is that the back-to-back dimension needs to be gauged to fit in the flangeways on my Code 250 switches.  I'm pulling them open, and then pressing them back against this gauge.  

    • March 6, 2018 7:14 PM EST
    • Don't forget the gauge on the outside of the wheel flange.  If the wheels happen to have a thick flange and you set the back to back then the wheels may not fit properly between the rails.  

    • March 6, 2018 6:33 PM EST
    • Jim Rowson said:

      What are the units in the STL file? Millimeters?

       I expect so.  I didn't specify otherwise, and the design was in millimeters.  

    • March 6, 2018 5:59 PM EST
    • I'd be happy to pay for materials time and shipping if you let me know how much.

       

      What are the units in the STL file? Millimeters?