This type has the smallest wire diameter in the series.
It uses a brass type special alloy, realizing a reduction of cost compared to expensive tungsten wire.
It exhibits maximum EDM performance in a wire EDM machine intended exclusively for using fine wire for precision machining of molds for lead frames, and so on.
The wire diameter is 0.07mmf.
Compared to 0.05mmf tungsten wire, the cut face is at least as good and also the machining speed is the same.
Product name
OB -
7 Wire diameter symbol
S Type symbol
(P-3R) Bobbin symbol
(0.5kg or 1.5kg) Standard QTY
Wire diameter and characteristics
Wire diameter symbol
Type symbol
Standard wire diameter mm
Wire diameter tolerance mm
Tensile strength MPa
Fracture load N
Conductivity %
7
S
0.07
+/-0.001
950(Min)
3.7(Min)
21(Min)
Bobbin
Bobbin symbol
Standard Quantity of wire kg
P-3R
0.5
1.5
is a standard stock product, and is a product on that can be produced to order.
