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Acme Threaded Rods

A reliable source for Acme Threaded Rods information and leading Acme Threaded Rods Companies & Manufacturers.

Acme threading is superior to square thread in many ways, offering a much more effective design for generating power for motion. Additionally, compared to V-shaped threads, Acme threads give additional strength due to their 29-degree angle. As a result, Acme threaded rod is frequently used in industrial applications, such as presses, milling machines, and more, since it can produce strong torque and power transmission. The thread helix comes in left- and right-handed varieties or directions. However, right-hand threads are the most prevalent. Read More…

Acme Threaded Rods Acme threaded rods are products used primarily as leadscrews in a variety of machines and devices. Leadscrews are used to translate turning motion into linear motion. Acme threaded rods look much like the shaft of a screw but are generally much longer and thicker than a normal screw without a head or pointed end.
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Leading Manufacturers

Bethel, CT  |  800-245-5013

Del-Tron Precision, Inc. produces and supplies various automated equipment, such as ball screw actuators. Our engineers have designed our ball screws to offer accuracy that is unparalelled by competitors.

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Del-Tron Precision, Inc. $$$

Bethel, CT  |  800-447-2042

When it comes to ball screws, no one does them better! We offer same day shipping to ensure that your product will be sent to you as soon as possible in order to keep your business moving smoothly.

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Tusk Direct, Inc. $$$

New Berlin, WI  |  800-298-2066

For over 70 years, Dynatect has provided motion control solutions for a wide range of markets. Our ball screws are custom-engineered for both OEM and replacement applications. Not only can Dynatect manufacture new ball screw assemblies, we can also reverse engineer, optimize and repair ball screws from almost any manufacturer. All work is conducted in a modern ISO 9001:2015 certified facility, with experienced technicians, onsite engineering, and inspection/test equipment. Contact us today and we will find a solution that works perfectly for you.

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Dynatect Manufacturing, Inc. $$$

Wake Forest, NC  |  919-863-0837

Accu-Tech USA offers one of the largest selections of automation and motion products, including Actuators, Linear Guides and Ballscrews, in North America. We specialize in providing applications engineering support and machining services to companies ranging from health care and optometry to packaging and automated machinery.

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Accu-Tech USA $$$

Fort Mill, SC  |  800-284-9784

Turn to us for uncompromising ball screws. All of our products adhere to extensive testing and you will not be let down by the quality of our items. We are your source for long-lasting items and unparalleled services. We have worked hard to improve our products over the years. These items are ideal for a multitude of industries. Our teams are ready to assist you with finding the perfect items for your situations.

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TPA Motion $$$
placeholder image Del-Tron Precision, Inc. Tusk Direct, Inc. Dynatect Manufacturing, Inc. Accu-Tech USA TPA Motion

thread helix direction

The most popular and best for general fastening purposes are single-start threads. Due to the thread's smaller helix angle, they provide greater resistance to loosening than multi-start threads. However, multi-start threads with multiple leads are used when quick disassembly is required.

start leads

Types of Acme Threads

When producing Acme threaded rods, three different types of threads are employed, these include:

  1. General Purpose (G)
  2. Centralizing (C)
  3. Stub Acme

General Purpose (G)

Generally, the common three-dimensional rod is used for machine tools, mechanisms, and valves. Every thread uses a trapezoidal thread form. They offer excellent strength and simplicity in manufacturing. Standardized variations include left-hand, multiple-start, and self-centering threads (which are less likely to bind when subjected to lateral forces). The Acme threaded rods replaced the triangular thread because they were significantly more effective at generating power for motion. A general-purpose rod is a looser fit and works better in dusty conditions.

Centralizing (C)

Except for the major diameter of both the internal and external screw threads having a limited clearance and being widely utilized for feed screws, centralizing Acme screw threads have the same thread form as general-purpose Acme threads. In addition, the constrained clearance permits a bearing at the major diameter of the thread to maintain thread axis alignment, reducing component sagging and wedging on the flanks.

Stub Acme

Stub Acme threads have been truncated, shrunk, or "stubbed" with numerous allowed variants for usage in tighter places.

How are Acme Threaded Rods Made?

Due to their durability, affordability, weight, and strength, steel and aluminum are two of the more popular raw materials in manufacturing Acme threaded rods. For applications where the rod is often exposed to corrosive elements, stainless steel is commonly used due to its inherent corrosion resistance. On the other hand, heavy-duty steel may be required in other circumstances to support big loads. Therefore, the thread rolling machine mass-produces threaded rods of a standard diameter and grade.

First, the round bar is passed through two hardened steel rollers to imprint the thread onto the bar. The incredibly high pressures applied by these rollers, which are spaced apart precisely and rotated perpendicular to the direction the round bar is being passed through them, transform the round bar into a threaded bar. Next, the round bar is pushed through rollers to imprint the thread into the surface in this largely automated process. Finally, after being sawed to size, the threaded bar's edges are beveled to create a smooth, usable, completed surface.

profile of acme threads

Applications of Acme Threaded Rods

Industrial applications that require significant torque and power transmission use Acme rods frequently. Acme thread is made to support large loads easily. Acme rods have the following applications:

  • CNC drive systems
  • Lathes
  • Milling machines
  • Presses
  • Lead screws

Compared to ordinary threaded rods, Acme screws have significantly improved wear characteristics, load capacities, and tolerances. Acme threaded rods perform better in dirt and debris areas because of their thicker and wider threads. For controlled motions on conveyors, jacks, testing equipment, and aircraft flaps, long-length Acme threads are used. Valve stems, hose couplings, pressure cylinder bonnets, steering systems, and camera lens movement all require short-length threads.

Benefits of Acme Threaded Rods

There are several benefits of Acme threading over the ordinary threaded rod. Among the advantages of Acme threaded rods are:

  • Compared to other possibilities, Acme threads use a 29-degree angle, resulting in wider and stronger threading.
  • Compared to ordinary threaded rods, Acme rods have significantly better wear characteristics, load capacities, and tolerances.
  • When there is dirt and debris present, thicker Acme threading performs better.
  • General-purpose Acme threads are made to function interchangeably at various grades.
  • The shape of the Acme thread is easier to machine.
  • The Acme thread has a wider base making it robust.
  • The Acme thread allows the use of the split nut.
  • They are relatively economical.

Drawbacks of Acme Threaded Rods

  • Acme threads are less efficient than square threads due to increased friction, and they also provide some radial pressure on the nut (angular offset from square).
  • They are susceptible to backlash, which causes them to wear out more quickly and become jammed up over time, leading to incorrect alignment.
  • Slower motion
  • Hard to support long spans
  • They lose precision over time.

Acme Threaded Rod Informational Video

 

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