Carbon Bar & Chrome Plated Data

Size range (inches) Plus Minus
0.500 - 2.499 0.000 0.0015
2.500 - 3.000 0.000 0.002
3.001 - 4.000 0.000 0.003
4.001 - 6.000 0.000 0.004
6.001 - 8.000 0.000 0.005
8.001 - 10.000 0.000 0.006

Straightness Tolerances

Size range (inches) Length in Feet Maximum Curvature (inches)
Under 0.625 Less than 15 0.188 in any 10 ft. portion of total length
Under 0.625 15 and over 0.313 in any 10 ft. portion of total length
0.625 and larger Less than 15 0.125 in any 10 ft. portion of total length
0.625 and larger 15 and over 0.188 in any 10 ft. portion of total length

Hard-Chrome Plating

Hardness of Chrome RC 68-72
Plate Thickness 0.005 inches min.
Surface Finish RMS 16 max.

Induction Hardening

Case depth 0.50" min., with the exception of 1 1/2 inches from either end of the bar which is neither hardened nor plated
Surface hardness RC 50 min.

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