The main variety of wire rope is 1. Phosphating coated steel wire rope, which is a patented product in recent two years. The steel wire is treated with manganese phosphating, which is very wear-resistant. It is an ideal upgrade product of smooth steel wire rope, and its service life has exceeded that of steel wire rope imported from developed countries such as Germany and Japan. 2. Galvanized steel wire rope includes hot dip galvanizing and electrogalvanizing, with thick zinc layer and thin electrogalvanizing layer. 3. Stainless steel wire rope, which is twisted with stainless steel wire, is more expensive. 4.
Wide-mouth vernier caliper is needed to measure the diameter of steel wire rope, which can span at least 3 strands, so the measurement is accurate. Now it's all digital display, and ordinary vernier calipers can't be used.