Ball Screw Nuts for Replacement and Matched Assemblies
DLY supplies ball screw nuts for replacement, spare parts stocking, machine repair and matched ball screw and nut assemblies. Buyers can order nut-only parts or matched screw and nut assemblies according to screw diameter, lead, nut type and mounting requirements.
In addition to regular ball screw nut models, DLY can also support non-standard ball screw nuts based on customer drawings or samples. If the nut flange, mounting holes, overall size or assembly requirement is different from standard models, buyers can send drawings for model confirmation and customization evaluation.
Find Ball Screw Nuts by Model, Diameter and Nut Type
Below you can find DLY ball screw nut products by nut series, screw diameter, lead, flange shape, circulation structure and replacement requirement. If you cannot find the exact nut you need, please send the old nut model, screw model, sample photo or drawing for confirmation.
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![SFU2510 Ball Screw Nut]()
SFU2510 Ball Screw NutThe SFU2510 ball screw nut is a standard flanged nut for 25mm diameter, 10mm lead SFU ball screw shafts. Compared with smaller SFU nut models such as 1204, 1605 or 1610, SFU2510 is used for larger -
![SFU1204 Nut]()
SFU1204 NutDLY SFU1204 Nut is a recirculating ball nut matched with 12mm diameter, 4mm lead SFU1204 ball screws. It is suitable for replacement, repair, spare parts stocking and compact machine assembly. DLY -
![Double Ball Nut]()
Double Ball NutDLY Double Ball Nut is a preloaded ball screw nut designed to reduce axial clearance and improve rigidity in repeated linear motion. It is suitable for CNC machines, precision automation modules, -
![Waist SFU Nuts]()
Waist SFU NutsThe DLY waist SFU nut is the one kind of ball screw nut. The Waist SFU Nuts adopt the internal circulation mode, and the steel ball follows the full groove of the internal circulation circulator, -
![Recirculating Ball Nut]()
Recirculating Ball NutDLY recirculating ball nuts are used with ball screw shafts to provide smooth, low-friction linear motion. They are suitable for replacement, maintenance, spare parts stocking and machine assembly. -
![Ordinary Round Hole SFU Nuts]()
Ordinary Round Hole SFU NutsThe DLY Ordinary round hole SFU nut is an important component in a ball screw drive system.. Ordinary round hole SFU nuts are mainly divided into internal circulation structure, single nut design, -
![SFNU Nuts]()
SFNU NutsSFNU is the model name of ball screw nut by DLY manufacturer, which is commonly used in precision mechanical transmission, such as CNC machine tools, 3D printers, etc. SFNU nut is the one kind of -
![SFY Nuts]()
SFY NutsDLY SFY NutsEnd-Caps Circulation1.End cap return design, high speed, low noise, high Dm-N value.2.Unique return design keep the smoothness even with high lead.3.Enhanced dust-proof design.4.Variety -
![SFA Nuts]()
SFA NutsThe SFA Ball Screw Nut is a single flanged A-type nut with a compact design and smooth ball circulation, providing high rigidity, precision, and reliable performance for CNC machines and automation -
![SFE Nuts]()
SFE NutsSFE Nuts are E-type flange ball screw nuts designed for high-precision, smooth, and efficient linear motion in industrial and automation applications. -
![1605 Ball Screw Nut]()
1605 Ball Screw Nut1605 ball screw nut is used with 16mm diameter and 5mm lead ball screw systems. It is suitable for CNC machines, engraving machines, 3D printers, automation slides and compact linear motion -
![1204 Nut]()
1204 Nut1204 nut usually refers to the nut in the ball screw nut pair, and 1204 represents some specifications of the ball screw. Different brands and models of 1204 nuts may vary in specific size and
How to Choose the Right Ball Screw Nut
A ball screw nut should be selected according to screw diameter, lead, nut series, flange shape, circulation type, preload or clearance, oil hole position and installation space. For replacement orders, the old nut model, screw model and sample photo are useful for reducing matching mistakes.
Screw Diameter and Lead
Confirm whether the nut matches the screw diameter and lead, such as 1204, 1605, 2505 or SFU2510.
Nut Series and Shape
Different series and flange shapes affect mounting space, fixing method and replacement compatibility.
Circulation Type
Internal, end cap and external circulation structures should be selected according to space, speed and load.
Preload and Backlash
Preload and clearance affect backlash, rigidity, running smoothness and repeated positioning.
Oil Hole and Lubrication
Oil hole position and lubrication method should be confirmed for installation and maintenance.
Nut Only or Assembly
Check whether nut-only replacement is suitable or a matched ball screw and nut assembly is safer.
Common Ball Nut Types DLY Can Support
Different ball screw nut types are used for different mounting structures, circulation methods, preload requirements and replacement needs. DLY can help buyers confirm the suitable nut type according to screw diameter, lead, flange shape, mounting space and application requirements.
SFNU Ball Nut
Suitable for compact ball screw nut mounting and replacement requirements.
SFNS Ball Nut
Used when buyers need a different flange structure for machine installation.
OFU Ball Nut
A ball nut option for specific mounting space and ball circulation requirements.
SFA Ball Nut
Compact flange ball screw nut for limited installation space.
SFH Ball Nut
A flange ball nut option for different mounting and assembly needs.
SFNI Ball Nut
Used for specific nut replacement or compact machine assembly structures.
SFNY Ball Nut
A ball screw nut type for different flange and circulation designs.
SFU Ball Nut
Common flange ball nut for standard ball screw assemblies and replacement use.
SFY Ball Nut
End cap circulation nut option for high speed and smooth motion applications.
Ball Nut Circulation Methods
Ball screw nuts use ball recirculation structures to reduce friction and support smooth linear motion. Common circulation options include internal circulation, end cap circulation and external circulation.
Ball Nut Replacement and Model Matching Support
Many buyers only need a ball screw nut replacement instead of a complete ball screw. For replacement orders such as 1605 ball screw nut, 16mm ball screw nut or SFU2510 ball screw nut, please send the old nut model, screw diameter, lead, flange dimensions and sample photos.
If the old nut cannot be matched safely, DLY can also help check whether a matched ball screw and nut assembly is more suitable.
Old Nut Model
Send the model marked on the old ball nut if available.
Screw Diameter and Lead
These two items must match the existing ball screw shaft.
Mounting Dimensions
Flange size, hole position and nut housing space should be checked.
Sample Photo
Clear photos help confirm nut type, flange shape and circulation structure.
Ball Nut Installation Notes
Many buyers ask how to install a ball nut on the screw. The key point is to use a transfer sleeve or mandrel and avoid removing the nut directly from the screw, because the balls may fall out. For users without installation experience, ordering a matched ball screw and nut assembly is usually safer.
Ball Nut Code, Dimensions and Quotation Information
Ball screw nut dimensions and model codes help confirm whether the nut can match the screw shaft, nut housing, nut mount or bracket. If the nut needs to fit an existing machine structure, please send the mounting drawing together with the nut model.
| Item | What It Means | Why Buyers Should Confirm |
|---|---|---|
| Nut series | SFU, SFA, SFE, SFY, SFNU, SFS and other types | Affects shape, circulation structure and installation method |
| Screw diameter | Such as 12mm, 16mm, 20mm or 25mm | Must match the screw shaft diameter |
| Lead | Movement distance per screw revolution | Must match the ball screw lead, such as 04, 05 or 10 |
| Flange and mounting | Flange shape, hole position and outside dimensions | Affects nut housing, mount or bracket compatibility |
| Preload or clearance | Normal clearance, preloaded nut or double nut structure | Affects backlash, rigidity and running smoothness |
Ball Nut Inspection and Packaging
Before shipment, DLY checks ball nut model matching, appearance, circulation smoothness, preload or clearance condition, oil hole position and packaging requirements. This helps reduce replacement mistakes and installation problems.
Matched Ball Screw and Nut Assembly Support
Ball nuts are often purchased together with ball screw shafts, support units, couplings and guideway components. If nut-only replacement is uncertain, DLY can help confirm a matched ball screw and nut assembly according to drawings or machine requirements.
Ball Screw Shafts
Ball screw shafts can be matched with suitable nuts according to diameter, lead, accuracy grade and assembly requirements.
View Ball ScrewsBall Screw Support Units
Support units are used for fixed end and floated end installation in complete ball screw assemblies.
View Support UnitsLinear Modules
Linear modules can combine ball screws, nuts, guideways, supports and related parts into one motion unit.
View Linear ModulesNot Sure Whether to Order Nut Only or a Complete Assembly?
Send your screw model, nut model, diameter, lead, drawing or sample photo. DLY can help check whether nut-only replacement or a matched ball screw and nut assembly is more suitable.
Ask DLY for Matched Assembly SupportStep-by-Step Ball Nut Ordering Guide
To help DLY confirm your quotation faster, please provide the old nut model, screw model, screw diameter, lead, nut photo, drawing or mounting dimensions when available.
Send Model or Photo
Send the old nut model, screw model, sample photo or drawing.
Confirm Diameter and Lead
Confirm screw diameter, lead, nut series and flange shape.
Check Nut Structure
Review circulation type, preload, clearance and mounting dimensions.
Decide Nut Only or Assembly
Check whether nut-only replacement or matched ball screw assembly is more suitable.
Receive Quotation
DLY provides quotation, lead time and packaging suggestion after model confirmation.
FAQ About Ball Screw Nuts
What information is needed to replace a ball screw nut?
Please send the old nut model, screw diameter, lead, flange dimensions, sample photo and machine installation information if available.
How do I know whether a nut matches my ball screw?
The nut must match the screw diameter, lead, thread direction, ball circulation structure and installation dimensions.
What is the difference between internal and external circulation ball nuts?
Internal circulation is more compact, while external circulation is often used for heavier load or industrial motion applications.
When should I choose a double ball nut?
A double ball nut is usually selected when preload, backlash reduction and higher rigidity are required.
Why should I avoid removing the ball nut from the screw?
If the nut is removed without a transfer sleeve, the balls may fall out and the nut may become difficult to reassemble correctly.
What dimensions should be checked before ordering?
Check screw diameter, lead, nut outside diameter, flange size, mounting hole position, total length and nut housing space.
Should I order a nut only or a matched ball screw and nut assembly?
If the existing screw condition and nut compatibility are clear, nut-only replacement may work. If matching is uncertain, a matched assembly is safer.
Need Ball Nut Replacement or Matching Support?
Send DLY your ball screw model, nut model, screw diameter, lead, sample photo or drawing. Our team can help confirm whether a nut-only replacement or matched ball screw and nut assembly is more suitable.
Zhejiang DLY Automation Manufacturing Co., Ltd. is well-known as one of the leading ball nut manufacturers and suppliers in China. Please feel free to buy high quality ball nut made in China here and get pricelist from our factory. For customized service and OEM/ODM service, contact us now.
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