Subject:
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Re: Warning: Train Motor Stress Cracking
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Newsgroups:
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lugnet.trains
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Date:
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Sun, 21 Jan 2001 07:42:10 GMT
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Viewed:
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1463 times
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Brian Williams wrote:
> Warning:
>
> At a get together last weekend I again noticed something on one of my
> locomotives that first appeared in 1999: stress cracking of the lower clips
> on the 9v train motor ends. These clips normally retain the bottom of the
> train coupler/buffer element. I, however, used them to attach a 1x4 brick
> in a tender design. The clips failed because they are designed to accept
> the coupler/buffer element which has a slightly thinner wall thickness than
> a standard brick.
>
> In response, I'm taking apart all my locomotives which use this design and
> filing the inside wall of the 1x4 slightly so as to provide a little "play"
> against the motor clips. I strongly recommend that anyone else using the 9v
> train motor in this way do the same.
>
> Stress cracking, as many of you are aware, can be a major problem for some
> ABS Lego elements. Typical cases include minifig arms at the "cuff",
> minifig legs at the "ankle", shutter hinges, and the old 12v 2x8 dark grey
> train track plates where they attach to the rails. What's unusual about the
> 9v train motor clips is that they failed after being assembled for only 4
> years, whereas these other elements typically take 8-10 years for stress
> cracking to appear.
>
> - Brian Williams
LEGO designs use standard bricks into them little clips. I don't see that it's
an issue. Unless they are putting a lot of pressure onto them.
Dean
--
Coin-Op's For Sale!: http://www.akasa.bc.ca/tfm/coin-op.html
Dean's Lego Workshop: http://www.akasa.bc.ca/tfm/lego_wr.html
Vancouver Lego Club: http://www.akasa.bc.ca/vlc
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Message is in Reply To:
 | | Warning: Train Motor Stress Cracking
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| Warning: At a get together last weekend I again noticed something on one of my locomotives that first appeared in 1999: stress cracking of the lower clips on the 9v train motor ends. These clips normally retain the bottom of the train coupler/buffer (...) (26 years ago, 21-Jan-01, to lugnet.trains)
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