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How to Calculate the Strength of Nylon Thread

Nylon thread comes in a variety of different weights or thicknesses and types, such as bonded and composite. Each type has a different tensile strength characteristics. Measuring the strength of nylon thread is relatively simple, and is usually done using the Chatillion scale and loupes.

Things You'll Need

Chatillion scale
Varying loupe sizes
Nylon thread of weight desired

Instructions

- 1
  Select the weight of the thread you want to test. Record the type of nylon thread you are testing on a piece of paper.
- 2
  Tie the thread around the top hook of the Chatillion scale. Loop the thread around the hook several times before making the knot; make sure the knot is secure enough that it will not come undone.
- 3
  Tie the other end of the thread to a stationary hook in the same fashion, so that the scale is free-hanging.
- 4
  Test the scale with your hand to observe its reading, applying light pressure on the lower hook. Familiarize yourself with the scale and its sensitivity before applying the loupes.
- 5
  Begin applying loupes to the bottom hook of the scale, using small (single ounce, if possible) increments. The scale should accurately read how much weight is being applied.
- 6
  Continue adding loupes until the thread breaks, and record the weight limit at which the thread broke. Repeat for other varieties and weighs of thread.

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