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How to determine mesh count
Mesh means the number of openings or fractions of openings per lineal inch of wire fabric. To determine the mesh of a given weave, measure from the center of a wire to a point one inch distand and count the intervening openings. For fine mesh, a counting glass or mesh reader is usually required. (See figs. 1,2,3)
How to determine space cloth or opening
“Space” means the actual clear opening or width between parallel wires. It should be differentiated from the term “mesh” (the distance from the center of one parallel wire to the center of the next parallel wire) (See fig. 4.)
How to determine wire diameter or thickness
It is recommended that a micrometer or vernier calipers be used for accuracy in determining wire diameter, however, a wire guage can give a quick and somewhat accurate reading as well. ( See fig. 5)
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Guidelines for Ordering Wire Cloth
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| 1. Specify opening or mesh count, wire diameter and alloy required.
2. Give the overall (finished) dimensions of material, and the quantity required.
4. For vibrating screens, supply this information:
A. Size and make of machine (if known)
B. Exact finished dimensions of section. Measure from either outside to outside of hooks, or inside to inside of hooks. (See fig. 1) “OCW” can be determined by measuring the dimensions of the clear clamping width between the vibrator side plates and subtracting 1 to 1-1/2 inches.
C. If a slotted opening is required, the direction of the slot should be specified in relation to the hook strips. Number of shoot wires should also be specified (most common is single shoot and triple shoot). Slots “RA” or “Against the flow” indicate the slots are right angle to the hook strips. (See fig. 2) Slots “SP” or “With the flow” indicate the slots are parallel to the hook strips. (See fig. 3) (Note : End Tension screens will change the slot direction terminology.)
D. If two or more screens are used for the length, advise if a lap is desired. Give the overall length first, then specify the length of the hook and amount of screen overlap needed. (See fig. 4)
E. Specify the type of metal to make the hook strips, and advise any special conditions such as : End tension, Welded hooks, holes punched, one hook up; one hook down, center crown, rolling, brazing.
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