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General Questions About
Wire-wound Rods

Q. What is a wire-wound metering rod?

A wire-wound metering rod, often called a Mayer rod after its inventor, Charles Mayer, is a stainless steel rod around which stainless steel wire is tightly wrapped. The wound wire creates a thread that is always the same profile (a half circle). Wire size is determined by the diameter of wire wrapped around the rod. These rods are usually chrome plated to extend working life. Wire-wound rods are used on coating machines to apply pigments and other coatings onto various web surfaces.



Q. What is a double-wrapped wire-wound metering rod?

A double-wrapped wire-wound metering rod is designated a size based on its equivalent wire size. The equivalency is found when the total area of the openings on wire-wound and double-wrapped wire-wound rods of the same length is equal.

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Q. How do I size a double-wrapped wire-wound metering rod?

A double-wrapped wire-wound metering rod is designated a size based on its equivalent wire size. The equivalency is found when the total area of the openings on wire-wound and double-wrapped wire-wound rods of the same length is equal.

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Q. What does the size of a wire-wound metering rod represent?

The size of a wire-wound metering rod is based on the diameter of wire wound around the rod. The size is usually shown as the actual diameter of wire multiplied by 1000. Thus a size 10 wire-wound rod would be made with wire 0.010 inches in diameter. Smaller size rods have smaller open areas and thus apply less coating than larger size rods. Please be aware that other manufacturers may use an entirely different size designation.

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Q. What is the wire made of on a wire-wound metering rod?

The wire used is 300 series stainless steel.

Q. What is the relationship between the wire or thread size
and the coat weight or coating thicknessh

A larger wire diameter or thread size will produce a heavier coat weight or thickness
because it has larger thread openings and thus applies more coating.

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