Ball Screw Support Manufacturer and Supplier
DLY ball screw supports are used to fix and support both ends of a ball screw shaft. They help keep the screw shaft aligned, reduce installation risk, and support stable linear motion in CNC machines, automation equipment, linear modules and industrial motion systems.
We supply common BK/BF, FK/FF and EK/EF ball screw support units, and can also assist with matched ball screw assemblies, end machining, model selection and bulk purchasing for distributors and machine builders.
DLY Ball Screw Support Product Catalog
Below you can find DLY ball screw support units by series, fixed-side type, floated-side type and matched ball screw application. If you are not sure which support unit matches your ball screw, please send the ball screw model, shaft end drawing, support unit model or sample photo for confirmation.
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![FK FF Ball Screw End Support]()
FK FF Ball Screw End SupportFK FF Ball Screw End Support is designed to support the fixed and floating ends of a ball screw shaft. The FK side provides axial positioning, while the FF side supports the opposite end and allows -
![EK EF Ball Screw End Supports]()
EK EF Ball Screw End SupportsEK and EF Ball Screw End Supports are critical components in a ball screw assembly, designed to provide support at the ends of the ball screw, ensuring smooth and accurate operation. Like the BK and -
![BK BF Ball Screw End Support]()
BK BF Ball Screw End SupportThe BK series features square support units commonly used for horizontal installations, such as on the X and Y axes of machinery. The fixed end (K-end) is designed to pair with a corresponding
How to Choose the Right Ball Screw Support Unit
A ball screw support unit should be selected according to ball screw diameter, shaft end machining, fixed side and floated side structure, bearing arrangement, mounting space, load condition and speed requirement. If you are not sure which BK/BF, EK/EF or FK/FF support unit matches your screw, please send the ball screw model, end machining drawing or sample photo for confirmation.
Ball Screw Diameter
The support unit model should match the screw shaft diameter and end machining size.
Fixed and Floated Side
Fixed side controls axial positioning, while floated side supports the opposite end of the screw.
Mounting Space
BK/BF, EK/EF and FK/FF have different housing shapes and mounting directions.
End Machining
Bearing seat diameter, thread size, shoulder length and lock nut position should match the support unit.
Fixed Side vs Floated Side Ball Screw Supports
Ball screw support units are usually used in pairs. The fixed side is used for axial positioning and load support, while the floated side supports the other end and allows slight axial movement to reduce binding risk.
| Support Type | Common Models | Main Function | Buyer Notes |
|---|---|---|---|
| Fixed Side Support | BK, EK, FK | Provides axial positioning and supports the machined screw end. | Must match the ball screw end machining, bearing seat and lock nut structure. |
| Floated Side Support | BF, EF, FF | Supports the opposite screw end while allowing slight axial movement. | Helps reduce binding risk caused by thermal expansion or installation stress. |
BK/BF, EK/EF and FK/FF Support Unit Options
DLY supplies common BK/BF, EK/EF and FK/FF ball screw support units. These series are selected according to mounting structure, installation space, screw size and fixed or floated side requirements.
BK/BF Support Units
Square type support units commonly used in standard ball screw installations. BK is the fixed side and BF is the floated side.
EK/EF Support Units
Compact support units suitable for smaller machine structures and limited mounting space. EK is the fixed side and EF is the floated side.
FK/FF Support Units
Flange type support units for different mounting directions and compact equipment designs. FK is the fixed side and FF is the floated side.
Ball Screw End Machining and Support Unit Matching
Ball screw support units must match the screw end machining dimensions. Before production or replacement, buyers should confirm shaft diameter, bearing seat diameter, thread size, shoulder length, lock nut position and support unit model.
Bearing Seat Diameter
The bearing seat should match the bearing inside the fixed or floated support unit.
Thread Size
Thread size should match the lock nut or fixing structure used at the screw end.
Shoulder and Step Length
Step dimensions affect bearing positioning, installation depth and assembly stability.
Drawing Confirmation
A shaft end drawing helps reduce model mismatch before support unit selection.
Ball Screw Support Structure and Components
Fixed-side support units usually include housing, bearing, oil seal, spacer ring and lock nut. Floated-side support units usually include housing, bearing and optional shaft clamp. Different support types should be selected according to assembly structure and screw end machining.
BK Fixed Side Support
Square fixed side support for axial positioning and stable ball screw installation.
BF Floated Side Support
Floated side support for the opposite screw end and smooth axial movement.
EK Fixed Side Support
Compact fixed side support for smaller ball screw assemblies.
EF Floated Side Support
Compact floated side support for the free end of the ball screw shaft.
FK Fixed Side Support
Flange fixed side support for compact mounting structures.
FF Floated Side Support
Flange floated side support for the free end of the screw shaft.
Ball Screw Support Applications
Ball screw support units are used in machines that need stable screw rotation, accurate positioning and reliable end support for ball screw assemblies.
Related Ball Screw Assembly Components
Ball screw support units are usually selected together with ball screws, ball nuts, couplings and guideway components. DLY can help buyers confirm related parts according to machine drawings and assembly requirements.
Ball Screw
Matched with support units according to diameter, lead and end machining.
View Ball ScrewsBall Nut
Selected together with the ball screw shaft for complete transmission assemblies.
View Ball NutsLinear Guideway
Used with ball screw assemblies to guide load and stabilize linear motion.
View Linear GuidewaysWhy Choose DLY for Ball Screw Support Units?
For overseas buyers, choosing ball screw support units is not only about model names. The support model must match the ball screw end machining, fixed and floated side requirement, bearing structure and installation drawing.
Model Confirmation
Support model checking by screw diameter, end drawing and installation structure.
Matched Screw Assembly
Support units can be confirmed together with ball screws, nuts and couplings.
Installation Risk Reduction
Checking fixed side, floated side and shaft end dimensions helps reduce assembly problems.
Export Packaging
Products are packed according to quantity, model and transport method for export orders.
Step-by-Step Ball Screw Support Ordering Guide
To help DLY confirm your quotation faster, please send the ball screw diameter, end machining drawing, support unit model, sample photo or complete assembly requirement.
Send Screw Information
Send ball screw diameter, end machining drawing or existing support model.
Confirm Support Pair
Confirm fixed side and floated side models such as BK/BF, EK/EF or FK/FF.
Check Machining Fit
Check bearing seat, shoulder length, thread size and lock nut position.
Confirm Related Parts
Check whether ball screws, nuts, couplings or guideways are needed together.
Receive Quotation
DLY provides quotation, lead time and packaging suggestion after model confirmation.
FAQ About Ball Screw Support Units
How do I choose between BK/BF, EK/EF and FK/FF support units?
The choice depends on mounting space, screw diameter, installation direction and shaft end machining. BK/BF is a common square type, EK/EF is compact, and FK/FF is flange type.
What is the difference between fixed side and floated side support?
Fixed side support controls axial positioning, while floated side support holds the opposite end and allows slight axial movement to reduce binding risk.
Why must support units match ball screw end machining?
The bearing seat, shoulder length, thread size and lock nut position must fit the support unit. Otherwise, installation may fail or cause poor running accuracy.
What information should I send for a support unit quotation?
Please send the ball screw diameter, end machining drawing, support unit model, quantity, sample photo or complete assembly requirement.
Can I order support units together with ball screws and nuts?
Yes. DLY can help confirm ball screws, ball nuts, support units and couplings together according to the drawing or application requirement.
What should be checked before installing ball screw support units?
Check fixed side and floated side direction, bearing seat fit, mounting surface, lock nut tightening, alignment and lubrication condition.
How does DLY pack ball screw supports for export?
DLY arranges protective packaging according to support model, quantity and transport method to reduce surface damage and missing parts during delivery.
Need Ball Screw Support Price or Model Matching?
Send DLY your ball screw diameter, support unit model, shaft end drawing or sample photo. Our team can help confirm suitable BK/BF, EK/EF or FK/FF support units before quotation.
Zhejiang DLY Automation Manufacturing Co., Ltd. is well-known as one of the leading ball screw support manufacturers and suppliers in China. Please feel free to buy high quality ball screw support made in China here and get pricelist from our factory. For customized service and OEM/ODM service, contact us now.
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