topic Re: Need Help in 3D Part & Assembly Design

Need Help

aminhas — Thu, 09 Apr 2020 20:42:33 GMT

Hello All,
Hope all is well; I need to know how to calculate the Rope wires core and strands wires dia the outer dia is .0195" I have attached the picture for references.

With Best Regards,

Adnan

Re: Need Help

VladimirN — Fri, 10 Apr 2020 18:34:49 GMT

Your message is missing an attachment.

Re: Need Help

aminhas — Sun, 12 Apr 2020 16:21:20 GMT

Sir,

sorry now I was attached please check

Re: Need Help

Pettersson — Thu, 23 Apr 2020 13:39:33 GMT

Draw it in the Sketcher and measure?

Re: Need Help

KenFarley — Tue, 11 Feb 2025 17:49:09 GMT

Let's say we have N wires around the core, outer diameter of bundle is D.

Assumed outer strands are all touching adjacent outer wire, plus touching inner "core" wire.

Let's say outer strands have diameter B, inner core is diameter C.

Geometry shows the following two equalities:

D = 2B + C

B = (C X SIN(180/N) / (1 - SIN(180/N))

For a given D, you can solve for C, which is algebraically not so tidy, but given by:

C = D / ((2 X SIN(180/N) / (1-SIN(180/N) + 1)

For your given example, this yields C = 0.0506, B = 0.0722