Subject:
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Re: Super Chief will be ready for prime-time: a trick to make it work.
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Newsgroups:
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lugnet.trains, lugnet.lego.direct
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Date:
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Thu, 24 Oct 2002 17:36:54 GMT
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Viewed:
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410 times
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A funny thing that I noticed wrt changes in train wheels happened right
around 1996, specifically in set 2126 (the 4 train cars). It seems that the
center hole is not "true" center or the wheels where not "true" round. I
recall making several 2 axle train cars using these wheels and observe ring
that the cars rocked side to side as they rolled down the track. I recall
inspecting them closely by looking directly over the wheel tread aligning it
with a fixed spot and rotating the wheel. My observations where that the
wheel tread was bobbing up and down relative to the fixed spot; once per
rotation. This effect seems to be more masked when running cars on bogies by
an averaging effect.
I thought I mentioned this back then but can't find the post.
SteveB
PNLTC
In lugnet.trains, Reinhard "Ben" Beneke writes:
> In lugnet.trains, Reinhard "Ben" Beneke writes:
>
> Ok, I have now 12 wheel sets in front of me:
>
>
> ************************+
> 4x from a MISB Metroliner 4558 from ca 1991...1994
> Never run a single meter so far....
>
> Measured for all 4 wheel sets (no bigger difference noticable between sets):
>
> Metal axle lenghth: 44.4 to 44.45 mm
> angle at tip of metal axle measured against length axis: 45°
> Diameter of axle: 1,95 to 2.0 mm
> Diameter of axle where wheels are placed: 1.80 to 1.85 mm
> width of wheelspace in axle: 4.05 mm
> distance between wheels: 33.3 to 33,35 mm
>
> outer wheel diameter: 23,00 to 23.05 mm
>
> bearing effect is supposed to be placed in the tip.
> Nearly no sound while moving wheel set under weight of my long stretched arm.
>
> ************************+
> 4x from a 4563 heavy used, bought on aftermarket out of kids hands.
>
> Measured for all 4 wheel sets (no difference noticable between sets):
>
> Metal axle lenghth: 44.50 to 44.6 mm
> angle at tip of metal axle measured against length axis: 45°
> Diameter of axle: 1,95 to 2.0 mm
> Diameter of axle where wheels are placed: 1.85 mm
> width of wheelspace in axle: 4.05 to 4.1 mm
> distance between wheels: 33.25 to 33,3 mm
>
> outer wheel diameter: 23,00 to 23.1 mm
>
> bearing effect is supposed to be placed in the tip. (much wear in the frame
> counter part to the tip, some little wear at the counterparts above the
> cylindric part of the metal axle between between the wheels, but near to them.
> Some periodic sound (2 times per 1 rotation) while moving wheel set under
> weight of my long stretched arm.
> 1 wheel touches frame at both 10 o'clock and 2 o'clock position: frame got
> worn out at that points.
>
> ************************+
> 4x from limited 10020 Santa Fe - so far unused.
>
> Measured for all 4 wheel sets (no difference noticable between sets):
>
> Metal axle lenghth: 44.45 mm
> angle at tip of metal axle measured against length axis: 45°
> Diameter of axle: 1,95 mm
> Diameter of axle where wheels are placed: 1.8 mm
> width of wheelspace in axle: 4.1 to 4.15 mm
> distance between wheels: 33.30 to 33.35 mm
>
> outer wheel diameter: 23,00 to 23.1 mm
>
> bearing effect is supposed to be placed in crosspieces between the wheels
> (visible wear (shining surface) in the frame counter part to metal axle
> cylindric part.
> At some angle per rotation the sound is less than at most time. (Again while
> moving wheel set under weight of my long stretched arm).
> Partly one, partly both wheels are touching the frame at both 10 o'clock and 2
> o'clock position: frame got (a little) worn out at that points (only a little,
> because the test time has been only 10 times back and forth rolling....)
>
> ************************+
>
> So far no differences to be found. The frame looks more or less the same, BUT
> the wall thickness at the point, where the wheel might touch is
>
> for 4558: 0.9 to 0.95 mm
> for 4563: 0.95
> for 10020: 1.1 to 1.15 mm
>
> I am not sure if this small thickened wall-part may be responsible for all the
> trouble, but it sounds not impossible to me.
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=264039
>
> (or restore the direct link till it gets moderated)
> http://www.brickshelf.com/gallery/Ben/misc/none-quality/wheel_sets_oldandnew.j
> pg
>
>
> Kind Regards,
>
> Ben
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