Acme or Lead Screws

An acme screw is a lead screw. Lead screws can have several thread types and acme threads are trapezoidal lead screw designs with a 30 degree offset. At Comptrol, we provide a number of trapezoidal lead screw options for our customers including threaded bars, nuts, and supports.

The kinds of applications you have at your facility will dictate the type of threads your acme lead screws require. For example, the direction of motion is important, and this will determine if you should have left or right-handed threads.

Stub Acme Threads

Stub acme is a modified acme thread and the profile is considerably shorter, hence the term "stub". Some applications require a thread that is shallower and coarser than a standard acme screw. In some cases, a stub thread application can interchange with a general purpose 2 G acme thread, because the pitch diameter allowances are the same.

In some actuator applications, a standard class G acme thread may wedge and a stub thread (with its lower profile) prevents this wedging because there is less clearance.

The Importance of Choosing a Size

At Comptrol we can provide acme lead screws as large as six inches in diameter and as small as 3/16.

Lead Screw Assemblies

We can manufacture, repair, and replace lead screws and entire assemblies. This includes the nuts and the kind of lead support system you need. Nuts can be made from a large variety of materials, including metal alloys, bronze, steel, Nylon, plastic and more.


  • Unified Threaded Bars
  • Metric Threaded Bars
  • Acme Threaded Bars
  • Trapezoidal Threaded Bars
  • Acme Nuts & Components‚Ä®

Acme Screws

  • Class 2G, 2C, 3G, 3C
  • Diameters up to 6"
  • Stub Acme
  • Trapezoidal Metric 7e
  • Right or left hand threads
  • Single or Multiple lead threads
  • Alloy Steel or Stainless Steel
  • Lead Screws
  • Standard in diameters 3/16" to 6"
  • Standard leads from 3/16" up to 2"
  • Lead accuracies to 0.003 in/ft
  • Bronze, alloy, or plastic nuts

Comptrol works with many acme screw manufacturers such as:

nook thomson motion


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Comptrol can help you size, design, and provide STEP or AutoCAD drawings for all of your application needs.