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I need a break from N-B-W

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  • Member since
    March 2002
  • From: Milwaukee WI (Fox Point)
  • 11,439 posts
I need a break from N-B-W
Posted by dknelson on Friday, March 16, 2007 4:32 PM

I'm getting too old for this .... trying to detail a steel support on a stone arch bridge.  My original photos suggested that one panel on the steel support was riveted so I promptly created a small piece of styrene with four evenly spaced rivets. 

But when I took a closer look at the bridge I saw my photos were misleading -- they were not rivets but nuts and washers on a steel rod.    Darn.  Fortunately I had access to the back of that small piece of styrene.

So off to Walthers and I came home with Grandt Line plastic castings for Nut/Bolt/Washer combinations (usually referred to as N-B-Ws or NBWs).

They are tiny!   Fortunately and by coincidence, the dimple on the back of each rivet was a perfect place for the small drill bit (in a pin vice) to start, so my holes are as evenly spaced as my rivets were.  But getting those tiny castings off the sprue -- thank heavens for the Sprue Cutter thingy that looks like a tweezers with sharp edges -- getting a wee amount of glue on the post, and then trying to get that tiny post in the tiny hole -- reminds me of installing the grabirons on a P2K kit.  My 54 year old hand just is not that steady enough any more, even with good light and high magnification (under which I could see just what nice detail is on those Grandt Line N-B-W castings.   Very impressive.  Several of them landed on the floor by the way.   But they come in a pack of 100 for $3). 

Finally I got them in but they did not look right to me.  Then I realized -- the N-B-W head is slightly offset from center on the mounting pin.  I assume this is deliberate.  So it was a matter of moving things around a bit with a toothpick while the cement still had some give in it.

There is no particular lesson to be learned here, other than that the back side of a rivet dimple makes a good starting hold for drilling with a tiny drill bit.  I just needed to calm down and get my hand steady again for the next part of the project. 

Dave Nelson

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