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Thread rolling die, roller and spare part manufacturing.
With experience built since 1977, from Istanbul to the world.
WHAT IS THREAD ROLLING?
Thread rolling is a cold forming process in which profiled rollers apply pressure to the surface of a tube or round material to create threads. The material flows towards the roller profile and the desired thread form is produced.
In thread rolling, the material’s grain flow is not severed; it follows the thread profile. This preserves the material’s structural continuity. The surface work hardening produced by cold forming can improve thread strength and fatigue resistance under suitable material and process conditions.
In cut threading, some material is removed by cutting and the grain flow is interrupted at the thread surfaces. Because rolling forms the material without cutting its structure, it can offer advantages in strength and surface quality over cut threads.
At Çağrı Makina, we manufacture the complete dies, rollers and die components that perform this process.
Explore our thread rolling dies
HOW IT WORKS
First, the workpiece material, dimensions and thread profile to be formed are determined. The thread standard, pitch, right- or left-hand helix direction and number of starts are considered together.
The tube or round workpiece is prepared to the appropriate starting dimensions for rolling. Its position and compatibility with the die are checked; internal support is used in tubes where necessary. Correct preparation is the basis for a consistent thread form.
Rollers suited to the selected thread profile apply pressure to the surface during relative rotation with the workpiece. The material is formed by pressure to match the thread profile on the rollers, without being weakened by cutting.
Die settings and operating conditions are determined by the material properties, required dimensions and equipment used. This creates the requested profile on tubes, screws, bolts or other round workpieces.
After the process, the thread diameter, pitch, profile and surface condition are assessed against the technical drawing and order requirements. The inspection method is selected according to the thread type and required tolerances.
Where required, suitable gauges or measuring instruments are used for verification. Results assessed on a sample help review die settings and workpiece preparation; dimensional consistency is monitored in repeated production.
WHY THREAD ROLLING?
With suitable materials, dies and process conditions, rolling offers advantages in surface quality, material utilisation and series production.
During thread forming, the material is shaped by pressure rather than weakened by cutting. This increases its strength and contributes to a longer service life.
The rollers’ surface-forming action helps produce even, smooth thread flanks under suitable conditions.
Uninterrupted material flow and surface work hardening can contribute to thread strength in suitable applications.
With correct workpiece preparation and settings, repeated threading operations can achieve efficient and consistent production.
Results depend on the material, starting dimensions, thread profile and process conditions. We assess technical suitability together for each application.
THREAD STANDARDS AND CUSTOM PROFILES
We manufacture custom thread rolling dies for international thread standards, including Metric, Unified, Whitworth, BSP and NPT, with right- and left-hand helices and single- or multiple-start profiles.
Different thread families for tubes, screws, bolts and other round workpieces.
Die and roller manufacturing for the required thread direction.
Custom manufacturing for two-, three- or more-start thread profiles.
A DIE OR A SPARE PART?
PRODUCTION IN ACTION
Watch our thread rolling dies in operation on the relevant product pages.