5360 Enterprise Blvd., Bethel Park, PA 15102 USA
P: +1 (412) 833-1662 • F: +1 (412) 835-6474
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Formulas

Wire Drawing Formulas

D = wire diameter
Dl = beginning wire diameter
Ds = ending wire diameter
AR = reduction in area
N = number of dies
Df = finished diameter of the die
Bl = bearing length
A = die angle
Back A = back relief angle


Weight per foot of wire:
Finished diameter by reduction:
Starting diameter by reduction:
Even reduction in area:
Area in reduction:
Elongation %:
Meeting Point:


Delta Factor Chart

% Reduction
 
5%
10%
15%
20%
25%
30%
35%
2°
2.73
1.33
0.86
0.63
0.49
0.39
0.33
4°
5.46
2.66
1.72
1.26
0.97
0.79
0.65
6°
8.19
3.99
2.59
1.88
1.46
1.18
0.98
8°
10.92
5.32
3.45
2.51
1.95
1.57
1.30
10°
13.65
6.65
4.31
3.14
2.44
1.97
1.63
12°
16.30
7.94
5.15
3.75
2.91
2.35
1.95
14°
19.03
9.27
6.01
4.38
3.40
2.74
2.27
16°
21.76
10.59
6.87
5.01
3.89
3.14
2.60
Delta values for a range of die semi-angles and drawing reductions


Right Triangle's
wire drawing
Known Sides and Angles
Unknown Sides and Angles
a and b
c = √a2 + b2
A = arc tan a/b
B = arc tan b/a
a and c
b = √c2 - a2
A = arc sin a/c
B = arc cos a/c
b and c
a = √c2 - b2
A = arc cos b/c
B = arc sin b/c
a and ∠A
b = a/tan A
c = a/sin A
B = 90° - A
a and ∠B
b = a x tan B
c = a/cos B
A = 90° - B
b and ∠A
a = b x tan A
c = b/cos A
B = 90° - A
b and ∠B
a = b/tan B
c = b/sin B
A = 90° - B
c and ∠A
a = c x sin A
b = c x cos A
B = 90° - A
c and ∠B
a = c x cos B
b = c x sin B
A = 90° - B


Conversions
Bar X 14.50 = PSI PSI X .06895 = Bar
Celsius: (Celsius X 9/5)+32 = Fahrenheit Fahrenheit: (Fahrenheit -32) X 5/9 = Celsius
Feet/Minute X .00508 = Meters/Second Meters/Second X 196.86 = Feet/Minute
Gallons X 3.785 = Liters Liters X .2642 = Gallons
Horsepower X .7457 = Kilowatts Kilowatts X 1.341 = Horsepower
Inch X 25.4 = Millimeters Millimeters X .03937 = Inch

 

 

 
 
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5360 Enterprise Blvd., Bethel Park, PA 15102 USA • P: +1 (412) 833-1662 • F: +1 (412) 835-6474
diequip@diequip.com