Tolerance on Drawn Rounds, Squares & Hexagons

Nominal Dimension Tolerance Class to ISO 268-2
mm h6 h7 h8 h9 h10 h11 h12
>1 to <3 0.006 0.010 0.014 0.025 0.040 0.060 0.100
>3 to <6 0.008 0.012 0.018 0.030 0.048 0.075 0.120
>6 to <10 0.009 0.015 0.022 0.036 0.058 0.090 0.150
>10 to <18 0.011 0.018 0.027 0.043 0.070 0.110 0.180
>18 to <30 0.013 0.021 0.033 0.052 0.084 0.130 0.210
>30 to <50 0.016 0.025 0.039 0.062 0.100 0.160 0.250
>50 to <80 0.019 0.030 0.046 0.074 0.120 0.190 0.300
>80 to <120 0.022 0.035 0.054 0.087 0.140 0.220 0.350
>120 to <180 0.025 0.040 0.063 0.100 0.160 0.250 0.400
>180 to <200 0.029 0.046 0.072 0.115 0.185 0.290 0.460

 

Notes

  • All Values are +0/-n
  • Standard production Drawn Rounds are h10
  • Standard production Drawn Hexagons <=80mm is h11, >80 is h12
  • Drawn roundbars in Quenched & Tempered condition are h11

 

Tolerance on Drawn Flats

Width Deviation ISO 286-2 Class
mm mm mm
<=18 +0.000 -0.110 h11
>18 <=30 +0.000 -0.130 h11
>30 <=50 +0.000 -0.160 h11
>50 <=80 +0.000 -0.190 h11
>80 <=100 +0.000 -0.220 h11
>100 <=150 +0.500 -0.500 –
>150 <=200 +1.000 -1.000 –
>200 <=300 +2.000 -2.000 –
>300 <=400 +2.500 -2.500 –

 

Thickness Deviation ISO 286-2 Class
mm mm mm
>3 <=6 +0.000 -0.075 h11
>6 <=10 +0.000 -0.090 h11
>10 <=18 +0.000 -0.110 h11
>18 <=30 +0.000 -0.130 h11
>30 <=50 +0.000 -0.160 h11
>50 <=60 +0.000 -0.190 h11
>60 <=80 +0.000 -0.300 h12
>80 <=100 +0.000 -0.350 h12