Threading is among the most basic of operations in metalworking, but that doesn’t make it easy. The most challenging part of any threading operation can be determining which threading style and tool to use. There are multiple variables to consider, from the thread profile and pitch to the component material of the workpiece, the set-up on hand, run size, and more. Are you cutting internal or external threads? Left- or right-hand? Large diameter or small?
With over half a century of experience in all kinds of threading, Knight Carbide is a good place to start. Below, you will find a general rundown of the most common threading operations and examples of the kinds of applications each can accomplish.
SINGLE-POINT threading is a basic, but prevalent, threading method involving a cutting insert with a single cutting edge to produce threads on a workpiece. This method is often used in manual or semi-automatic machining operations, and is valued for its versatility and utility.
Single-point threading is commonly used in job shops, repair shops, and small-scale manufacturing operations where flexibility and simplicity are essential. It is suitable for producing threads on a wide range of materials and workpiece sizes.
- On-edge threading can either be a top-notch tooling system, or an on-edge triangle. Top-notch threading tools are widely used in machining close-tolerance parts for industries such as aerospace, medical and automotive, whereas triangle threading is used to create external threads on cylindrical workpieces.
- Application: On-edge threading tools can be used to create threads in various engine components requiring high precision for assembly and functionality. Examples include turbine blades, compressor blades, and shafts. Triangle threading has countless industrial applications in oil & gas, medical devices, and more.
- Laydown threading involves positioning the cutting edge at a low angle relative to the work surface. It is a versatile process that enables the creation of highly precise internal threading. Benefits include improved chip control and reduced cutting forces, resulting in better surface finish and longer tool life.
- Application: Laydown threading is often used in mass production environments where high-speed machining and extended tool life are essential, such as in automotive manufacturing, consumer electronics, and general engineering.
MULTI-TOOTH threading uses more than one tool simultaneously, allowing more complex threading operations in less time. Chip removal becomes more challenging, as does tool changing, as different tools will wear at different rates. Examples of multi-tool threading operations include:
- Thread Milling uses a rotating tool moving in three axes along a spiraling path to cut interior or exterior threads of extremely high accuracy. Unlike traditional threading methods, thread milling cutters can produce threads of various sizes and pitches with a single tool.
- Application: Thread milling is commonly used in industries requiring flexibility and versatility in thread production, such as aerospace and automotive. Examples include turbine blades, engine mounts, and structural fittings for aerospace, as well as automotive components for suspension, transmission and other systems.
- Thread Chasing is used to create or repair external threads on cylindrical workpieces. These tools typically consist of multiple cutting edges arranged in a circular configuration. Multi-form thread tools are often the most efficient way to apply threads.
- Application: Thread chasers are commonly used in high-volume production environments where consistency and repeatability are critical, such as in the automotive industry for producing engine, transmission, and suspension components; and in the oil and gas industry for pipes and couplings.
- Thread Whirling is a specialized machining process used to produce high-precision external threads on cylindrical workpieces. This process involves the rotation of a cutting tool, called a thread whirling head, around the workpiece while the workpiece itself remains stationary. Thread whirling is commonly used to produce threads with a high degree of accuracy, surface finish, and thread form integrity.
- Application: Thread whirling is commonly used in industries requiring the production of long threads with high accuracy and surface finish, such as in the production of screws and bolts for surgical implants; automotive axle and transmission shafts; drill rods and valve stems for oil and gas; and external threads on firearm muzzles for the defense industry.
Special Design Threading Toolscan be custom created for specific machining requirements or workpiece geometries. Knight Carbide is accomplished at designing custom threading tools for complex applications. Custom thread profiles, specialized coatings, and other innovative solutions can be applied to solve any unique machining challenge.
Contact Us for Your Next Threading Solution
Though no two threading challenges are ever exactly the same, they can all have the same solution: Knight Carbide. Find out more about our threading products, and download our comprehensive guide on the subject. As always, you can reach out to us at any time with your questions on threading tools or any other manufacturing topic at 586-598-4888, or at knightcarbide.com
