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N F 1000 N * :

mm D.m 20 mm * :

mm d 4 mm * :

Drahtdurchmesser

Initial assumption for wire diameter

mm D.a D.m d + : mm 24

Außendurchmesser

External coil diameter

N F.2 F : 1000 N *

Maximalkraft

Maximum force

Direct application of the numerical value equation with units

k.1 0.15 d 5 mm * < 0.16 cases :

k.1 0.15

U.d mm 1 N mm * 3 nthroot * / :

Units for d, from its definition and default units from the book.

d k.1 F.2 D.a * 3 nthroot * U.d * : mm 4.33