Motor to Ball Screw Drive Connection
Coupling selection should be checked together with motor shaft diameter, ball screw end machining, support unit arrangement, torque requirement and installation space.
Check DLY Coupling Models Below
The product list below includes clamp type curved jaw couplings, setscrew type couplings, keyway flexible shaft couplings and metallic spring couplings. If the exact bore size is not shown, DLY can help confirm whether a standard or customized bore option is available.
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![Clamp Type Curved Jaw Coupling]()
Clamp Type Curved Jaw CouplingDLK8 clamp type curved jaw coupling uses two aluminum alloy hubs and a polyurethane elastomer to transmit torque while absorbing vibration and compensating for parallel, angular and axial -
![Setscrew Type Curved Jaw Coupling]()
Setscrew Type Curved Jaw CouplingThe DLK8 setscrew type curved jaw coupling connects two rotating shafts through two aluminum alloy hubs and a polyurethane elastomer. It transmits torque, absorbs vibration and compensates for -
![Keyway Type Flexible Shaft Coupling]()
Keyway Type Flexible Shaft CouplingDLK7 Keyway Type Flexible Shaft CouplingOne-piece Metallic Spring CouplingZero BacklashAbsorption of parallel,angular misalignments and shaft end-play by spring actionIdentical clockwies ang -
![DLK7 Clamp Type Flexible Shaft Coupling]()
DLK7 Clamp Type Flexible Shaft CouplingDLK7 Clamp Type Flexible Shaft Coupling is a zero-backlash one-piece metallic spring coupling used to connect two shafts in servo motors, stepper motors, ball screw drives, encoders and compact -
![One Piece Metallic Spring Coupling Setscrew Type]()
One Piece Metallic Spring Coupling Setscrew TypeDLY DLK7 / DSK7 one-piece metallic spring coupling is a setscrew type flexible shaft coupling designed for compact precision transmission systems. The one-piece metallic spring structure helps
How to Choose the Right Coupling
The most important information is the bore size on both sides. For ball screw drive systems, coupling selection should be checked together with the motor shaft diameter, ball screw end diameter, torque, speed, fixing method and installation space.
Motor Shaft Diameter
Confirm the motor-side shaft size, such as 6mm, 8mm, 10mm, 12mm or 14mm.
Ball Screw End Diameter
The screw-side bore should match the machined ball screw end diameter.
Torque and Speed
Motor power, load, acceleration and working RPM affect coupling selection.
Fixing Method
Clamp type, setscrew type and keyway type should match the shaft and assembly requirement.
Common Coupling Types DLY Can Support
DLY coupling products mainly support common ball screw drive and motor connection needs, including curved jaw couplings, flexible shaft couplings, clamp type couplings, setscrew type couplings, keyway couplings and one-piece metallic spring couplings.
Flexible Shaft Coupling
Used when a small amount of radial, angular or axial deviation needs to be absorbed.
One-Piece Metallic Spring Coupling
Used for compact structures where elastic deformation support is required.
Clamp Type, Setscrew Type and Keyway Type Options
The fixing method affects installation convenience, shaft holding force and maintenance. For replacement orders, the coupling fixing method should match the original design or machine drawing.
Clamp Type Coupling
Uses clamping force to hold the shaft. Suitable for easier installation and better shaft surface protection.
Setscrew Type Coupling
Uses screws to fix the shaft. Common for small motors and compact ball screw drive assemblies.
Keyway Type Coupling
Used when the shaft has a keyway and stronger torque transmission is required.
Coupling and Ball Screw End Machining
Coupling selection is closely related to ball screw end machining. The coupling bore should match the machined screw end diameter, while the support unit, bearing seat, shoulder and thread should also be considered together.
Coupling with Ball Screw Support Unit
A complete ball screw transmission system usually includes the motor, coupling, fixed-side support unit, ball screw, nut and floating-side support unit. The coupling should not interfere with the support unit, machine cover or motor mounting plate.
Applications for Ball Screw Couplings
Couplings are used in machines where motors drive ball screws, lead screws or other rotary shafts. The coupling should be selected according to torque, speed, accuracy and installation condition.
CNC Machines
Used between servo motor and ball screw shaft for axis movement.
Linear Modules
Used in compact linear module drive structures with motor and screw transmission.
3D Printers and Laser Equipment
Used in compact motion axes and small motor-driven screw systems.
Automation Equipment
Used in repeated positioning, pushing, lifting and transfer mechanisms.
Installation and Matching Notes
Coupling installation affects vibration, noise and transmission stability. Before installation, confirm bore size, shaft alignment, screw tightening, keyway position and interference with nearby components.
Check Bore Size
Both motor side and screw side should match the shaft diameters.
Avoid Excessive Misalignment
Flexible couplings can absorb small deviation, but large misalignment should be corrected.
Tighten Evenly
Clamp screws or setscrews should be tightened properly according to the coupling structure.
Check Interference
The coupling outer diameter and length should fit the available installation space.
Related Ball Screw Drive Components
Couplings are often selected together with ball screws, ball screw support units, ball nuts and linear modules. DLY can help buyers check the matching direction according to drawings and assembly requirements.
OEM and Bulk Coupling Supply
For equipment manufacturers, distributors and regular buyers, DLY can support common coupling model supply, bore size checking, batch orders and export packaging according to project requirements.
Bulk Model Supply
Suitable for regular coupling models used in CNC and automation systems.
Bore Size Checking
Motor-side and screw-side bore sizes can be checked according to drawings.
Labeling and Packaging
Clear labeling and packaging help support warehouse management and export shipment.
FAQ About Ball Screw Couplings
Do ball screws need couplings?
In most motor-driven ball screw systems, a coupling is used between the motor shaft and the ball screw end.
How do I choose coupling size for a ball screw?
Confirm the motor shaft diameter, ball screw end diameter, torque, speed, precision requirement and available installation space.
What is the difference between clamp type and setscrew type coupling?
Clamp type couplings hold the shaft by clamping force. Setscrew type couplings use screws to fix the shaft directly.
Can DLY match couplings with ball screws?
Yes. DLY can check the ball screw size, end machining drawing and motor shaft size to suggest a suitable coupling matching direction.
What information is needed for a coupling quotation?
Please send the coupling type, motor shaft diameter, screw-side diameter, torque or motor power, quantity and application requirement.
Need Coupling Price or Ball Screw Matching Support?
Send DLY your motor shaft size, ball screw model, end machining drawing, coupling type or application requirement. Our team can help check the coupling matching direction before quotation.
Zhejiang DLY Automation Manufacturing Co., Ltd. is well-known as one of the leading coupling manufacturers and suppliers in China. Please feel free to buy high quality coupling made in China here and get pricelist from our factory. For customized service and OEM/ODM service, contact us now.
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