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brettneale
Moderator
Joined: 30 Apr 2005
Posts: 1615
Location: Adelaide, Australia
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 Posted: Mon Jun 26, 2006 3:16 pm Post subject: Lego Dimensions |
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Okay here's the thread for dimensions of Lego bricks. I'll start off with what I have (just off the top of my head which I got from LDraw part models) and post away if you have more to add! Maybe pics will be added later...
Just a note on conventions used - first number indicates a real measured dimension, and dimensions in brackets are taken from LDraw part files (where 2.5LDU = 1mm, divide LDU by 2.5 to get mm).
Dimensions are measured using Vernier Calipers or other fine-tolerance measurement device. Please only add dimensions if they are measured with such a device! No school rulers!
Basic Brick Dimensions
One Lego Unit = 7.88mm (8mm)
Brick height = 9.6mm (9.6mm)
Plate height = 3.18mm (3.2mm)
Stud diameter = 4.5mm (5mm)
Stud Height = 1.86mm (1.6mm)
Hollow Stud Inner Diameter = ?mm (3mm)
Pit Diameter = ?mm (not modelled)
Pit Depth = ?mm (not modelled)
Brick/Plate Wall Thickness = 1.6mm (1.5mm)
Brick Wall Depth = Varies (8.1mm)
Plate Wall Depth = 2.25mm (1.7mm)
Tube Inner Diameter = 5mm (5mm)
Tube Outer Diameter = 6.6mm (6.314mm from trigonometry)
Technic Bricks
Technic Parts
Large Bushing Length = 7.7mm (8mm)
Small Bushing Length = 4mm (4mm)
Two Small Bushes with Teeth, Meshed = 7.1mm
As always, post away if you find any errors.
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Last edited by brettneale on Mon Jun 26, 2006 5:51 pm; edited 3 times in total |
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Robin Huurman
Global: Robin Huurman
Joined: 06 Apr 2006
Posts: 1493
Location: The Netherlands
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pehrlich
Apprentice
Joined: 12 Jun 2006
Posts: 138
Location: GMT -5
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| Posted: Mon Jun 26, 2006 5:25 pm Post subject: |
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Heres some more dimensions to add:
Brick height = 9.6 mm (9.6mm)
Plate height = 3.2mm (3.2mm) - actually 3.18 if you want to be picky. 3.2 is close enough
Brick Wall Depth = ?mm (8.1mm) - looks as if this # varies. 8.5 mm on the 1 x 6 I'm measuring, 8.3mm on the 2x2 inverted slope (what i have sitting around  )
Tube Inner Diameter = 5mm (5mm)
Tube Outer Diameter = 6.6mm (6.314mm from trigonometry) - as a double check, wall thickness is 0.8mm, which confirms the 6.6 reading.
On a side note, of what use is the diameter of the "Hollow tube" between two studs and "pit depth" of a stud? |
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brettneale
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Joined: 30 Apr 2005
Posts: 1615
Location: Adelaide, Australia
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| Posted: Mon Jun 26, 2006 5:46 pm Post subject: |
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Thanks. I'll add them.
| pehrlich wrote: |
| On a side note, of what use is the diameter of the "Hollow tube" between two studs and "pit depth" of a stud? |
Well I was meant to write about the hollow stud inner diameter, which is the same as minifig tool diameters such as lightsaber bars. Things can fit in them snugly, including small tubes which are 3mm diameter (twice wall thickness). As for the pits (the little holes under the studs if people don't know what I'm on about), well I just added them because I model them for realism.
| pehrlich wrote: |
| Tube Outer Diameter = 6.6mm (6.314mm from trigonometry) - as a double check, wall thickness is 0.8mm, which confirms the 6.6 reading. |
As for these, they must flex a small amount to keep the fit nice and snug. I've noticed some of my tubes (really old ones) are starting to get little depressions in them from studs. That probably explains most of the differences between nominal and toleranced dimensions.
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Make it idiot-proof and they'll make a better idiot...
Last edited by brettneale on Mon Jun 26, 2006 5:54 pm; edited 1 time in total |
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DonkeyKong
Experienced builder
Joined: 10 Mar 2006
Posts: 542
Location: Kent - England
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| Posted: Mon Jun 26, 2006 5:51 pm Post subject: |
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Ah cool, now i can use these to make those custom parts i was on about for my Ferrari, thanks. 
Got the plate height and stud sizes and that's all i need.
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pehrlich
Apprentice
Joined: 12 Jun 2006
Posts: 138
Location: GMT -5
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| Posted: Tue Apr 24, 2007 3:08 am Post subject: |
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The Technic Beam is not square in cross section. Heres the dimensions:
Lengthwise across holes in beam: 0.308in (7.84mm)
Crossways to holes in beam: 0.293in (7.46mm)
Ratio: 1:1.05 |
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DonkeyKong
Experienced builder
Joined: 10 Mar 2006
Posts: 542
Location: Kent - England
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| Posted: Tue Mar 10, 2009 6:37 pm Post subject: |
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Is there anyone who has one of the Hailfire Droid Wheels, and whether you can tell me its diameter and thickness (in mm)?
I didn't want to create a topic just for that so I thought this would be the most appropriate place to put it.
Thanks.
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