3 Fundamentals of press design

446 Solid forming (Forging)
Table 6.2.3: Diameter, length and deflection tolerance of solid forward extruded parts, in mm
D
up to
mm
diameter D
normal narrow
L
up to
mm
tolerances
length
normal narrow
deflection B
normal narrow
25 0.10 0.02 150 0.25 0.20 0.15 0.03
50 0.15 0.08 200 0.75 0.50 0.25 0.05
75 0.20 0.15 300 1.50 1.00 0.35 0.07
100 0.25 0.18 450 2.00 1.50 0.50 0.10
Table 6.2.4: Diameter, concentricity, wall and web thickness tolerance of backward extruded cups,
in mm
tolerances
D
diameter run-out
up to
normal narrow normal narrow
mm
D d D d
25 0.20 0.15 0.10 0.03 0.25 0.10
50 0.30 0.20 0.125 0.035 0.30 0.15
75 0.35 0.30 0.15 0.04 0.35 0.20
100 0.40 0.50 0.175 0.06 0.40 0.25
s, h
up to wall thickness s
tolerances
bottom thickness h
mm normal narrow normal narrow
2 0.10 0.075 0.25 0.15
5 0.15 0.10 0.35 0.20
10 0.25 0.15 0.45 0.30
15 0.35 0.25 0.55 0.40
Table 6.2.5: Diameter, concentricity, wall thickness tolerance in mm of tubular components
produced by ironing
D
diameter
tolerances
run-out s
up to
normal narrow normal narrow up to normal
mm
D d D d
mm
25 0.15 0.10 0.075 0.025 0.25 0.10 1 0.075
50 0.25 0.20 0.10 0.03 0.30 0.15 2 0.075
75 0.30 0.25 0.125 0.35 0.035 0.20 4 0.10
100 0.35 0.30 0.15 0.45 0.045 0.25 6 0.10
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
wall thickness s
narrow
0.035
0.04
0.05
0.07