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Cast Iron (Dura-Bar) Tolerances

 

Round Bars

 

 

 

 

 

 

 

Round Bar
   Amount Oversized  
Nominal Diameter Size, in. G2 65-45-12 80-55-06 Diameter Tolerance, in.
0.750 to 1.250  + 0.085"  + 0.088"  + 0.088"  +/- 0.017"
1.251 to 2.000  + 0.090"  + 0.095"  + 0.090"  +/- 0.024"
2.001 to 3.000  + 0.110"  + 0.118"   + 0.113"   +/- 0.030"
3.001 to 4.000  + 0.125"  + 0.136"   + 0.131"   +/- 0.038"
4.001 to 5.000  + 0.140"  + 0.154"   + 0.149"   +/- 0.048"
5.001 to 6.000  + 0.155"  + 0.172"   + 0.162"   +/- 0.055"
6.001 to 7.000  + 0.170"  + 0.190"   + 0.180"   +/- 0.062"
7.001 to 8.000  + 0.190"  + 0.213"  + 0.203"   +/- 0.085"
8.001 to 9.000  + 0.216"  + 0.242"   + 0.232"   +/- 0.108"
9.001 to 10.000  + 0.254"  + 0.283"   + 0.273"   +/- 0.129"
10.001 to 11.000  + 0.400"  + 0.432"   + 0.422"   +/- 0.150"
11.001 to 16.000  + 0.582"  + 0.623"  + 0.608"  +/- 0.206"
16.001 to 18.000  + 0.762"  + 0.815"  + 0.795"  +/- 0.262"
18.001 to 20.000  + 0.762"  + 0.819"   + 0.799"   +/- 0.262"
Example (G2) : 4.00” + 0.125” = 4.125” tolerance is +/- 0.038” Max size = 4.163 Min size = 4.087. Finishes to 4.000"