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Threaded Rolling

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In threaded rolling, metal stock is deformed during the threading process by being rolled through dies. Using this method, external threads are created along the metal stock’s surface. The same principle, known as thread formation, can be used to create internal threads. Thread rolling is not a subtractive procedure, unlike other commonly used threading techniques like thread cutting. Stronger threads, exact final dimensions, good surface quality, and a lower coefficient of friction are just a few benefits of rolling threaded fasteners. Read More…

Threaded Rolling Thread rolling requires materials that have good deformation properties, including highly ductile metals such as aluminum and copper and excluding brittle materials such as cast iron.
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Leading Manufacturers

Reed City, MI  |  231-832-2356

H & R Screw Machine Products-ISO 9001-certified manufacturer of high-volume screw machine products for many industries. We also produce CNC turned parts and provide machining of customer supplied castings, forgings and stampings.

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H & R Screw Machine Products, Inc. $$$

Brentwood, NY  |  800-238-3929

It is Thuro’s mission to be the leading choice for screw machine parts, and to offer our products at the highest quality and the lowest cost. Our team members dedicate themselves to ensuring that our customers receive the perfect part on time, every time.

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Thuro Metal Products, Inc. $$$

Calabasas, CA  |  866-317-0208

Based out of California, Pacific West America, Inc. (PWA) is a metal fabrication company. We focus most of our efforts on swiss screw machining, stampings, and precision parts, and our electronics division makes products such as cable assemblies, connectors, circuit boards and membrane switches. We create our products using a variety of CNC controlled machines, processes and robotics. Such...

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Pacific West America, Inc. $$$

Wood Village, OR  |  503-557-4689

Since 2006, GrovTec has been designing and manufacturing a high-quality line of gun accessories with contract manufacturing capabilities. With 10 CNC machines, our contract manufacturing capability can match any high-performing company in the Northwest. Our CNC Machining capabilities include CNC Swiss, CNC Lathing, Multi Spindle Screw production, CNC Milling, Single Spindle Screw production, and...

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GrovTec Machining $$$

Lincoln Park, NJ  |  973-628-0002

Established in 1926, the Groov-Pin Corporation was founded in the spirit of innovation. We manufactured and distributed original, patented fastener solutions. Today, our product lines include threaded inserts, grooved pins, and precision-turned components engineered for aerospace, defense, agricultural, medical, and power distribution applications.

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Yorba Linda, CA  |  714-692-8009

Alpha Omega Swiss is a manufacturer of screw machine parts and products, Swiss screw machine products and turned parts and products. We design quality screw machine products for many industries such as the medical, dental, defense and many more.

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Alpha Omega Swiss, Inc. $$$
placeholder image H & R Screw Machine Products, Inc. Thuro Metal Products, Inc. Pacific West America, Inc. GrovTec Machining GROOV-PIN CORP Alpha Omega Swiss, Inc.

Threaded fasteners produced through thread rolling are non-permanent couplings that can be mechanically loosened or disassembled. Lead screws and power screws are categorized as mechanical drives or mechanisms. These machine components deliver electricity to other machine sections while regulating movement.

Thread Rolling Products

Thread Rolling Processes

There are three main categories for thread generation processes:

  • Deformation
  • Subtractive
  • Additive

The way the thread is created or shaped varies between these. For example, cutting procedures are more commonly used to describe subtractive processes.

Thread Tapping

Internal threads are created through the thread machining procedure of tapping. This uses a cylindrical tap, or conical cutting instrument. The many cutting edges on the tap resemble an external thread.

The tap is rotated while being axially advanced farther into the metal stock's bore to produce the internal thread.

Thread Tapping

Single-point Cutting

Single-point cutting uses a lathe machine, where the metal stock is clamped and rotated. A carriage fed linearly by a lead screw positions the cutting tool. This procedure can create both internal and external threads.

Single-point Cutting

Compared to tapping or die-cutting, this procedure takes longer. It has the benefit of producing several threads with just one cutting tool.

Die Threading

This method is employed to create external threads. It uses a similar degree of force and cutting motion to tapping. The metal stock is cut using a die, with several cutting points that resemble internal threads. Several die designs can be self-opening or solid.

Thread Chasing

Chasing uses a thread chaser, a collection of assembled single-point cutting tools. To cut the thread, a chaser is commonly attached to a lathe's carriage that is gradually indexed.

Thread Chaser

Thread Milling

During the milling procedure, the stock is threaded using one or more rotary cutting tools. The cutting tool is not only rotated and indexed axially, as in tapping and die-threading, but it also revolves around the perimeter of the threaded surface. Internal and external threads can both be produced via thread milling.

Thread Milling

Thread Casting

In this operation, the molten metal is injected or poured into a die or mold. The threaded part's negative form is contained in the die. To create precise threads, this procedure needs further machining operations. Therefore, fine threads cannot be produced with this method.

Advantages of Thread Rolling

Using a rolled screw press product has both many benefits and drawbacks. The product's stronger finish and dimensional correctness are thread rolling's key benefits. However, this technique relies on metal deformation. Therefore, it can only be used on soft metals and has higher tooling costs.

High Thread Strength

Thread rolling is known as a cold working procedure since it is often carried out at relatively low temperatures. It is well known that cold working can create stronger parts without additional heat treatment. Rolling is a good threading method for materials that don't respond to heat treatment. Compared to cut or ground threads, rolled threads are 10–20% stronger.

Good Surface Finishes

Without requiring further polishing steps, thread rolling naturally produces smooth and burnished threads. Any unevenness on the thread's surface is removed by the strong compressive forces that distort the metal. Cut threads normally have a surface roughness of 64 to 125 micro-inches Ra, whereas rolled surfaces typically have a surface roughness of 8 to 24 micro-inches Ra. Additionally, rolled threads are free of burrs, chatter marks, tears, and cutting marks.

Precision Threading

Since no material is removed from the stock during the rolling thread process and the dies used are mirror images of threads to be manufactured, the procedure may produce parts with high precision and accuracy over an extended period. This is true as long as the dies are precise and produced with enough hardness.

Precision Metals

Disadvantages of Thread Rolling

Expensive Tooling

Rolling dies must be exact and firm. Thread dimensional precision will be poor if the die is deformed. In addition, the needed hardness makes it challenging to fabricate the dies precisely.

Not Suitable for Hard Materials

Most thread rolling is done using malleable metals. Although feasible, thread rolling is not performed for metals with a Rockwell hardness greater than 40. Thread grinding is more useful above this hardness level. In addition, tool life is markedly decreased while rolling hard materials.

Choosing the Right Thread Rolling Company

To make sure you have the most productive outcome when selecting a thread rolling company, it is important to compare 5 companies using our thread rolling directory. Each thread rolling company has a business profile page that highlights their areas of experience and capabilities and a contact form to directly communicate with the company for more information or request a quote. Review each thread rolling company website using our proprietary website previewer to get an idea of what each company specializes in, and then use our simple RFQ form to contact multiple thread rolling companies with the same form.

Thread Rolling Informational Video


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