Standard Diameter Tolerances

Grade	Finish	Diameter Range	Tolerances
A2-D2-S7-01-H13 A6, H13,420,CPM 10V, CPM 9V	THRU 4”-DCF OVER 4"-RT	1/4" TO U 1/2" 1 1/2' TO U 3 1/16" 3 1/16" TO U 4 1/16" 4 1/16" TO U 6 1/16" 6 1/16" TO U 10" 10" TO U 14" 14" & OVER	+0.010"/.15" +0.020"/.35" +0.040"/.070" +0.060"/.125" +0.090/.135" +.100"/.150" +.0125'/.225'

Bars 2” in diameter and under will have a surface finish of 80 rms or better and bars over 2” diameter a surface finish of 125 rms or better.

Grade	Finish	Diameter Range	Tolerances
4140HR*HT.	Hot Finish (on size)	>5/8" THRU 7/8" 7/8" THRU 1" >1" THRU 1 1/8" >1 1/8" THRU 1 1/4" >1 1/4" THRU 1 3/8" 1 3/8" THRU 1 1/2" >1 1/2" THRU 2" >2" THRU 2 1/12" >2 1/2" THRU 3 1/2" 3 1/2" THRU 4 1/2" >4 1/2" THRU 5 1/2" >5 1/2" THRU 6 1/2" >6 1/2" THRU 8 1/2" >8 1/2" THRU 9 1/2" >9 1/2"	-.008"/+.008" -.009"/+.009" -.010"/+.010" -.011"/+.011" -.012"/+.012" -.014"/+.014" -.0156"/+.0156" -.000"/.0312" -.000"/.0469" -.000"/+.0625" -.000"/+.0781" -.000"/.125" -.000"/.156" -.000"/.1875" +.1875"/.250"
Precision Drill Rod		.124" AND SMALLER .125" THRU .499" .500 THRU 3.000"	+/-.0003 +/-.0005 +/-.001"