Techinal Info

D.H. produces bars and profiles in various sizes, tolerances, dimension and mechanical properties that suits customer’s requirements. D.H. adapts various international standards for producing material in various size tolerances. Click to know more.

TOLERANCES
Permissible Variation in Size of Cold Finished Round Bars
Specified Size, in (mm) Permissible Variation from Specified Size in (mm)
  Over Under
1/16 to 5/16 (1.50 to 8.00) excl. 0.001 (0.03) 0.001 (0.03)
5/16 to 1/2 (8.00 to 13.00) excl. 0.0015 (0.04) 0.0015 (0.04)
1/2 to 1 (13.00 to 25.00) excl. 0.002 (0.05) 0.002 (0.05)
1 to 1 1/2 (25.00 to 38.00) excl. 0.0025 (0.06) 0.0025 (0.06)
1 1/2 to 4 (38.00 to 100.00) excl. 0.003 (0.08) 0.003(0.08)
 
Permissible Variation in Size of Cold Finished Hexagonal and Square Bars
Specified Size, in (mm) Permissible Variation from Specified Size in (mm)
  Over Under
1/8 to 5/16 (2.50 to 8.00) excl. 0   0.002 (0.05)  
5/16 to 1/2 (8.00 to 13.00) excl. 0   0.003 (0.08)  
1/2 to 1 (13.00 to 25.00) incl. 0   0.004 (0.10)  
Over to 2 (25.00 to 50.00) incl. 0   0.006 (0.15)  
Over 2 to 3 (50.00 to 75.00) incl. 0   0.008 (0.20)  
Over 3 (75.00 mm) 0   0.010 (0.25)  
 
DIN TOLERANCE
Size range h7 h8 h9 h10 h11
3.00-6.00 mm 0.00 / -0.012 0.00 / -0.018 0.00 / -0.030 0.00 / -0.048 0.00 / -0.075
6.01-10.00 mm 0.00 / -0.015 0.00 / -0.022 0.00 / -0.036 0.00 / -0.058 0.00 / -0.090
10.01-18.00 mm 0.00 / -0.018 0.00 / -0.027 0.00 / -0.043 0.00 / -0.070 0.00 / -0.110
18.01-30.00 mm 0.00 / -0.021 0.00 / -0.033 0.00 / -0.052 0.00 / -0.084 0.00 / -0.130
30.01-50.00 mm 0.00 / -0.025 0.00 / -0.039 0.00 / -0.062 0.00 / -0.100 0.00 / -0.160
50.01-180.00 mm 0.00 / -0.030 0.00 / -0.046 0.00 / -0.074 0.00 / -0.120 0.00 / -0.190
80.01-120.00 mm 0.00 / -0.035 0.00 / -0.054 0.00 / -0.087 0.00 / -0.140 0.00 / -0.220
120.01-180.00 mm 0.00 / -0.025 0.00 / -0.039 0.00 / -0.062 0.00 / -0.100 0.00 / -0.160
 

COMPANY BROCHURE