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In lugnet.lego, Mark Bellis wrote:
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I believe that over the years the tolerance has been widened, with the aim of
reducing production cost.
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OK so I just went to my box of childhood LEGO (circa 1970-80) to check this out.
Discounting the CA bricks which have known deterioration problems, I put
together 4 stacks of 10 ABS bricks, 2 red and 2 white. I made sure I picked out
the “best looking” ones to avoid damaged edges etc which may have had an effect.
I noted 2 things:
- Several of the bricks had significantly less “clutch power”, though obviously this could also be from deterioration;
- The stacks ranged from 95.9 to 96.6 mm. It would be interesting to know if the brick tolerance is +/- 0.1 or 0.3 mm, either way they were all inside it. But there was still significant difference even with these old bricks.
So I would invite others who think the tolerance has widened to do similar tests
on older bricks to back up their claim.
ROSCO
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Message has 2 Replies:
 | | Re: Quality issue - update
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| (...) If exact brick size variation tends towards(1) a normal distribution there will be equal numbers of oversized and undersized bricks. Measuring the length of a “stack” of bricks will basically cancel out any error. Scott A (1) I say “tends (...) (20 years ago, 5-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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Message is in Reply To:
| | Re: Quality issue - update
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| (...) For storage I stack my 2x3 plates with 3 studs along one edge overlapping. There is a 3mm difference in height between two stacks of 38 2x3 plates. This is within the tolerance you quoted of 3.2mm +/-0.1mm, since 3mm/38 = 0.0789mm per plate. I (...) (20 years ago, 3-Jul-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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