What Is a Nut Rotary Type Ball Screw Set?
A Nut Rotary Type Ball Screw Set is different from a standard ball screw assembly. In a conventional ball screw system, the screw shaft rotates and the nut moves along the shaft. In a nut rotary type design, the screw shaft is fixed, and the nut unit is driven to rotate and move along the screw shaft.
This rotating ball screw nut assembly is designed for equipment where the travel stroke is long, the motion speed is high, or the screw shaft should not rotate at high speed. It is commonly used in semiconductor machinery, industrial robots, woodworking machines, laser processing machines, conveying systems and long-stroke automation equipment.
Simple explanation: the screw shaft stays fixed, the nut rotates, and the moving table travels along the screw. This structure helps solve the vibration and whipping problems often found in long rotating screw shafts.
How Does a Rotating Nut Ball Screw Work?
The main difference is the motion principle of the screw shaft and nut unit.
| Structure | Screw Shaft | Nut Unit | Suitable Application |
|---|---|---|---|
| Traditional Ball Screw | Rotates | Moves linearly | Short and medium stroke systems |
| Nut Rotary Type Ball Screw Set | Fixed | Rotates and moves | Long stroke, high speed and stable linear motion |
Fixed Screw Shaft
The screw shaft is installed as a fixed element and does not rotate during operation. This helps reduce vibration caused by long rotating shafts.
Rotating Nut Unit
The nut unit rotates through a drive structure and moves along the fixed screw shaft, driving the moving table or machine carriage.
Product Features of Nut Rotary Type Ball Screw Set
Designed for machines that require stable long-stroke transmission and high-speed movement.
Fixed Screw Shaft, Rotating Nut Structure
The rotating nut ball screw structure keeps the screw shaft fixed while the nut rotates to generate linear motion. It is suitable for machine designs where the screw shaft should avoid high-speed rotation.
Suitable for High-Speed Transmission
Since the long screw shaft does not rotate, this structure helps reduce screw whipping, vibration and critical speed limitation. It is more suitable for high-speed linear transmission than a long rotating screw design.
Multiple Nut Units on One Screw Shaft
One screw shaft can be equipped with two or more rotating ball screw nut assemblies, driven by different motors. This is useful for multi-station systems, independent moving tables and special automation layouts.
Compact Integrated Housing
The support block and bearing structure are integrated into a compact housing. The nut rotary unit can be mounted directly on the moving table, helping simplify the machine structure.
Simpler Shaft End Structure
Because the screw shaft is fixed and does not need to rotate, the shaft end structure can be simpler than a traditional high-speed rotating screw system.
Easy Installation on Moving Table
The rotating ball screw nut assembly can be installed on the moving worktable through the housing structure, making it suitable for compact machine layouts and long-stroke moving platforms.
Need a Nut Rotary Type Ball Screw Set?
Send us your drawing, stroke length, load condition and speed requirement. DLY can help check the suitable rotating ball screw nut assembly for your machine.
Email: dlyexport2@dlybearing.com | WhatsApp: +86 16605788856
Structure of Rotating Ball Screw Nut Assembly
The nut rotary type structure is usually composed of a rotating nut unit, housing, bearing support, timing pulley or drive connection, and a fixed screw shaft.
Rotating Nut Unit
The nut is the rotating element. It receives motor power through a pulley or drive structure and moves along the fixed screw shaft.
Housing Mounted on Moving Table
The housing can be installed on the moving worktable, helping connect the rotating nut unit with the machine carriage.
Fixed Screw Shaft
The screw shaft is fixed at both ends or according to the machine design. It does not need to rotate during transmission.
Drive Connection
The nut unit can be driven through a motor-side timing pulley, belt or other drive structure according to the equipment layout.
Nut Rotary Type Ball Screw Set vs Traditional Ball Screw
The rotating nut design is mainly selected when long stroke, high speed or multiple moving units are required.
| Item | Traditional Ball Screw | Nut Rotary Type Ball Screw Set |
|---|---|---|
| Motion Principle | Screw rotates, nut moves | Nut rotates, screw shaft remains fixed |
| Long Stroke Use | Limited by screw whipping and critical speed | More suitable for long-stroke transmission |
| High Speed Use | Long screw rotation may cause vibration | Better for high-speed linear motion |
| Multi-Nut Drive | Less flexible | Two or more nut units can be installed on one screw shaft |
| Shaft End Design | Requires rotating support design | Shaft end structure can be simpler |
Applications of Rotating Ball Screw Nut Assembly
Suitable for precision linear motion equipment requiring high speed, long travel and stable transmission.
Semiconductor Machinery
Used in precision transfer and long-stroke positioning systems.
Industrial Robots
Suitable for automated motion axes requiring stable linear movement.
Woodworking Machines
Used in long travel feeding, cutting and positioning equipment.
Laser Processing Machines
Helps support long-stroke and high-speed linear transmission.
Conveying Systems
Suitable for transfer devices and moving table systems.
Long-Stroke Automation
Used where long screw shafts need stable and efficient motion.
Information Needed for Selection
To recommend a suitable rotating nut ball screw solution, please provide the following information.
If one screw shaft needs two or more rotating nut units, please also confirm the number of moving units and whether each unit is driven independently.
Custom Supply from DLY
DLY provides support for both replacement and new machine design projects.
Custom Screw Length
Ball screw length can be supplied according to the required machine stroke and installation space.
Rotating Nut Unit Matching
DLY can help match the rotating ball screw nut assembly according to the buyer's motion structure.
Drawing-Based Production
Products can be confirmed based on drawings, installation diagrams or existing sample information.
Bulk Supply Support
Suitable for equipment manufacturers, automation system builders and distributors with repeated purchasing needs.
FAQ About Nut Rotary Type Ball Screw Set
Common questions about rotating ball screw nut and rotating nut ball screw applications.
Q1: What is a Nut Rotary Type Ball Screw Set?
It is a ball screw system where the screw shaft remains fixed and the nut unit rotates to generate linear motion. It is mainly used for long-stroke and high-speed linear transmission.
Q2: Is a rotating ball screw nut the same as a normal ball screw nut?
No. A rotating ball screw nut is usually part of a special assembly with housing, bearing support and drive structure. It is not simply a standard ball nut.
Q3: When should I choose a rotating nut ball screw?
It is suitable when the machine requires long travel, high speed, reduced screw vibration or multiple moving nut units on one fixed screw shaft.
Q4: Can one screw shaft use multiple rotating nut units?
Yes. One screw shaft can be equipped with two or more rotating nut units, and each unit can be driven by a different motor according to the equipment design.
Q5: Can DLY customize rotating ball screw nut assemblies?
Yes. DLY can provide customized rotating ball screw nut assemblies according to screw diameter, lead, travel length, mounting structure and buyer drawings.
Send Your Rotating Ball Screw Nut Assembly Drawing
Looking for a rotating nut ball screw solution for long-stroke or high-speed linear motion? Send us your drawing, stroke length, load and speed requirement. DLY can help check the suitable Nut Rotary Type Ball Screw Set for your machine.
Email: dlyexport2@dlybearing.com | WhatsApp: +86 16605788856
Hot Tags: nut rotary type ball screw set, China nut rotary type ball screw set manufacturers, suppliers, factory
