At Precision Industrial, we’ve built our reputation on the breadth and depth of our engineering and manufacturing expertise, and on the unrivaled quality of our thread-rolled and machined components. Tell us about your applications, your performance specifications, and the results you desire. Chances are we’ll be able to provide you with precisely the right solutions from a portfolio that covers just about any need:

Acme Screw

Acme threads are the most commonly used lead-screw thread for power-transmission and linear-motion applications. The Acme thread produces a robust actuation screw that provides a great deal of dynamic and static capacity into a power-transmission package.

Send us your specifications and we’ll find the answer.

Our Acme lead screw capabilities include:

  • Screw diameters: 3/16” – 8”
  • Lead angles: up to 43°
  • Threads per inch (TPI): 2 - 120
  • Screw lengths: as long as the steel available
  • Lead accuracy: down to .0005/12”
  • Screw efficiency: up to 60% (power screw)
  • Screw straightness: .002/12”

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Ball Screws

It’s difficult or impossible to find a catalog ball screw to meet the exact requirements of a special power-transmission or linear-motion application. That’s when it makes great sense to turn to Precision for support in meeting your specifications.

We’ve done a great deal of this work over the past half century, custom-manufacturing thousands of ball screws to customer requirements. Often innovative, our solutions have included:

  • Metric lead ball screws
  • Inch lead ball screws
  • Miniature ball screws
  • Hybrid lead ball screws

Custom ball screw markets: We’ve provided ball screws for a wide range of industries and products – including:

  • Aerospace actuators
  • Biomedical devices
  • Robotics
  • System automation

Ball screw materials: We make custom ball screw assemblies of heat-treated steels. Precision’s experience includes materials such as these:

  • 440C Stainless IAW AMS-5618 and AMS-5630
  • 6061 T6511 Aluminum IAW AMS-4173
  • 17-4PH Stainless IAW AMS-5643 and AMS-5644
  • Nitronic 60 IAW AMS-5848
  • 15-5PH Stainless IAW AMS-5659
  • 9310 Alloy Steel IAW AMS-6062, AMS-6265 and AMS-6267
  • 6150 Alloy Steel IAW AMS-6448
  • Nitralloy 135M Steel IAW AMS-6470, AMS-6471 and AMS-6472
  • Inconel
  • Monel
  • 8620 Alloy Steel
  • 6Al-4V Titanium

Manufacturing advantages: We’re able to offer our customers a number of important material advantages. For example:

  • Ball screw assemblies based on precision rolled ball screws
  • Normal diameters from .187” to 4” with thread micro finish typically 4 to 12 R.M.S.
  • Induction heat treating to Rockwell C52 with ends machined for bearings
  • Cold forming to give threads higher fatigue strength

Whether your requirements are exotic or represent only slight variations on a standard ball screw design, Precision’s engineering team is ready to support your efforts. We can guide you to designs that will meet your specific requirements, delivering performance that might otherwise be unachievable.

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Threaded Rods

A threaded rod, also known as a shaft, is a relatively long steel rod that is threaded on both ends; the threads may extend along the complete length of the rod. Threaded rod in bar stock form is called “all-thread.”

There are two types of shafts that are not completely threaded:

  • Full-bodied shafts have a shank equal to the thread’s major diameter. In these shafts, the stresses are greater in the threads than in the shank. Full-bodied shafts are examples of cut-thread components. They’re weaker, relatively speaking, because metal is removed to create the thread, disturbing the steel’s grain.
  • Undercut shafts have a shank equal to the thread’s pitch diameter. They’re designed for improved distribution of axial stresses. Undercut shafts are thread-rolled. Because the metal is “rolled” up to the major diameter, rather than being removed, they are stronger than full-bodied shafts. This process preserves the grain of the steel, and, in some cases, actually enhances it.

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Trapezoidal Screws

Designed to hold large loads and to deliver enhanced accuracy, the trapezoidal thread is found in power-transmission or linear-motion screws rather than static load situations.

The differences between trapezoidal and Acme threads are minor. Other than using metric metrology for dimensioning the thread, the geometry differs only in the included angle. While an Acme thread has a 29.5° included angle (14.5° flank angle), a trapezoidal thread will have a 30° included angle (15° flank angle).

The features that make it necessary for a trapezoidal thread to be customized include:

  • Material grade
  • Material temper
  • Corrosion resistance
  • Lubricants and coatings
  • Acceptance test requirements
  • Application engineering support

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Worm Threads

Worm threads are a key drive-train component in lawn and garden equipment – specifically, in self-propelled walk-behind units. We use thread-rolling technology exclusively to produce them.

Manufacturing advantages: Rolled threads produce higher fatigue strength and reliability. The material’s grain flow through the thread-rolling process minimizes the shear planes that are inevitable with cut or ground threads. For our customers, the advantages include:

  • Reduced product costs
  • Tighter dimensional tolerances
  • Greater strength
  • Higher fatigue resistance
  • Simplified inventory control

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262.679.9000  Ext. 126

Precision Industrial Products
S82 W19275 Apollo Drive
Muskego, WI 53150

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