Help understanding precision measurements?

[silverrat]

Planning on replacing the sunroof glass on my car soon.

Can someone please help me interpret this measurement from the service manual?

 

[zrxkawboy]

2+0.5/-1 mm means that a range of 1mm - 2.5mm is acceptable.

 

[stevejones]

Yep, it means the seal should be proud of the metal slightly all the way around the perimeter...

 

[Vern_in_IL]

Or easier said in the non-metric world:

1.75 mm +/- .75mm

 

[ZeeOSix]

Another way to say it is the top of the rubber seal around the glass should stick up above the roof panel surface between 1.0 and 2.5 mm.

 

[stevejones]

On second thought given the "precision" nature of the thread title, the dimension really means this: Ideally, get the seal 2mm above the metal. If it isn't; it's OK to be at 2.5 to 1.0 mm above. But we'd really like 2mm nominal.

 

[Yah-Tah-Hey]

+.10 to +.04. I read that as the gap can be as much as .10 or as little as .04 and .08 is preferred.

 

[silverrat]

Thank you all for the responses