Centralizing Acme threads have limited clearance at the major workpiece diameters of both the internal and external threads and are widely used extensively for feeding screws.  screw rod， Restricted clearance enables a bearing at the major diameter of the thread to preserve alignment of the threading axis preventing part sagging.

ACMEthread Chart

also with heavy torque and power transmission are required like lathes, milling, drilling  tappi那个presses, CNC systems, etc

Acme screw threadssize chart

with lower operating, manufacturing, and maintenance costs than the ball screw for the same industry application (where linear motion is necessary).

Acme threads also ideal for vertical, light/moderate loading conditions and offer very much safer holding condition when operating work under static load.

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Stubacme screw threads

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The following table defines recommended industry standard sizes for Internal ACME Threads per American National Standard ASME/ANSI B1.5.

When compared to other threads, acme threads present far superior wear properties, load capabilities, and tolerances than any standard threaded rods.

oil and gas industry, valve hydraulic, hydraulic couplers, and connected fasteners hardware for heavy load industry applications.