How to measure wire rope diameter - Port City Industrial & Marine Supply, Inc in Savannah, Georgia, USA (2024)

FAQs

How is wire rope diameter measured? ›

If you don't have a calliper at hand, there is another way to measure the diameter. Determine the circumference of the rope with a small thin string or whipping twine. Measure the length of the string with a ruler and divide the number by π (3.14159). This should give you the diameter of the rope.

Rope diameters are determined by measuring the circle that just touches the extreme outer limits of the strands— that is, the greatest dimension that can be measured with a pair of parallel-jawed calipers or machinist's caliper square. A mistake could be made by measuring the smaller dimension.

The measured diameter of a rope is the diameter of a circle which encircles the circumference of the wire rope and therefore when measuring a rope, it must be measured across the largest diameter, as shown to the right.

Given Data

Here, represent the diameter of wire. Thus, the expression of the diameter of wire is d = 4 ρ L π R .

Rope Measurement Recommendations

These recommendations state that the rope sample should be laid out straight on a flat surface with slight hand force or lightly tensioned by hand to measure the length. The rope should not be curved or twisted at any point along its length.

size 6mm, 8mm, 10mm, 12mm, 14mm, 16mm.

American wire gauges (AWG) are a standard set of sizes for wire conductors — the smaller the wire gauge, the larger the diameter in inches or millimeters, and vice versa.

A standard round gauge tool is the most common tool for measuring wire size. To measure a wire gauge, strip the wire and try to fit it into the numbered grooves that appear closest to it in size. The correct size should just fit the wire, but still allow it to pass through to the hole to be removed.

Which tool is used to measure the size of wire? ›

Explanation: Standard Wire Gauge (SWG): It is used to measure the size of a wire and the thickness of the sheet. The standard wire gauge is a circular metal disc with varying holes and slot sizes on its circumference.

For example: Rope dia (D) = 12 mm SWL (kg) = D2 (mm) x 8 = D (mm) x D (mm) x 8 = 12 x 12 x 8 = 1152 kg SWL (t) = 1.15 tonnes The above equation can be reversed to calculate the diameter (D) in millimetres of FSWR needed to lift a given load.

The actual diameter of a wire rope is the diameter of a circ*mscribed circle that will enclose all the strands. It 's the largest cross-sectional measurement as shown here. You should make the measurement carefully with calipers.

Caliper gauge

For professional measuring of rope diameters PFEIFER offers special caliper gauges in various dimension.

Stranded wire gauges should be measured by calculating the equivalent cross sectional copper area. First, measure the bare diameter of a single strand and locate the circular mils value in the row that matches your measurement. Second, multiply the circular mils by the number of strands in the cable.

In commerce, the sizes of wire are estimated by devices, also called gauges, which consist of plates of circular or oblong form having notches of different widths around their edges to receive wire and sheet metals of different thicknesses.