[warfreak]

does any one know if a change in room temperature of +/- 10 F from about 72 F will be enough to make a measurable impact (around .005) on an aluminum part.

part is to be drilled on a fixture with bushings using a k-hole and a pin to center and position on said fixture.

i really dont think that temp is playing no considerable impact as to why holes are out of true position but im a new guy at work so my opinions dont carry that much weight so i was hoping some info regarding this .

[timlkallam]

Alum expands .0000147 per inch for 1 dreg. in tempreture. So if you piece is 12 inchs long 12 x .0000147 x ? dregs.= ?

[warfreak]

so in other words a room temp variance of 70 to 85 degrees is not enough to cause more than .010 in a holes true position right?

[Builder4wd]

It depends on how far apart the holes are. The farther apart, the greater the change, the closer together, the smaller the change.

[timlkallam]

The holes would have to be about 50 inchs apart. To get
.010 change .