Ball Screws with External Threaded Nuts
Ways to Order
Miniature ball screw, 6mm diameter, 2mm lead, 150mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2mm lead supports faster travel than 1mm with..
$143.33
Miniature ball screw, 8mm diameter, 2.5mm lead, 150mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2.5mm lead supports applications requiring quick positioning, while..
$146.27
Miniature ball screw, 8mm diameter, 2mm lead, 150mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2mm lead supports faster positioning and controlled linear..
$143.33
Miniature ball screw, 8mm diameter, 1mm lead, 150mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 1mm lead supports fine positioning and controlled linear..
$143.33
Miniature ball screw, 6mm diameter, 1mm lead, 150mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 1mm lead supports fine positioning and controlled linear travel,..
$143.33
Ball screw, 8mm diameter, 1mm lead, 250mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 1mm lead supports fine positioning and controlled linear travel,..
$153.13
Ball screw, 10mm diameter, 2mm lead, 250mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2mm lead supports applications requiring quick positioning over longer..
$148.22
Miniature ball screw, 6mm diameter, 1mm lead, 250mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 1mm lead supports fine positioning and controlled linear..
$153.13
Miniature ball screw assembly with an 8 mm diameter Grade 10 screw and 2 mm lead, combining precise motion with a longer 250 mm travel for fast positioning over extended distances. A cylindrical nut with right-hand external threads enables simple, secure mounting, while precision-rolled construction maintains accuracy across the full..
$153.13
Ball screw of 10mm diameter, 2mm lead, 500mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2mm lead supports faster travel than 1mm but..
$177.64
Ball screw, 8mm diameter, 2.5mm lead, 250mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2.5mm lead supports faster travel while the Grade 10..
$158.03
Miniature ball screw, 6mm diameter, 2mm lead, 250mm length, with a TRS cylindrical nut featuring right-facing external mounting threads. Unlike the smooth CNS nut with polymer wipers, the TRS nut mounts directly into a mating threaded component and has no wipers. The 2mm lead supports faster travel while still supporting..
$155.09
Miniature ball screw assemblies with externally threaded cylindrical nuts combine Grade 10 precision-rolled steel screw shafts with compact nuts that mount directly into matching internally threaded housings or machine components. Unlike smooth cylindrical CNS nuts with polymer wipers, these TRS nuts use right-facing external mounting threads as standard and omit wipers for simpler, space-saving integration.
Screw diameters include 6mm, 8mm, and 10mm, with 1mm, 2mm, and 2.5mm lead options depending on diameter. Lead is the axial distance the nut travels during one complete screw rotation; smaller leads support finer positioning, while larger leads provide more travel per revolution. Grade 10 precision rolling provides consistent lead accuracy over the screw length for reliable linear motion.
Standard-fit nuts have no more than 0.05mm backlash. Transitional-fit nuts reduce play to no more than 0.008mm backlash and may include slight preload for more responsive direction changes. Custom screw lengths, screw-end machining, and left-facing external nut threads are available through the custom configurator.
- Grade 10 precision-rolled steel ball screws
- Externally threaded cylindrical nut for direct mounting into a matching threaded component
- Right-facing external nut threads supplied as standard
- More compact mounting than many flanged-nut configurations
- No polymer wipers for compact integration
- Available in 6mm, 8mm, and 10mm screw diameters
- Lead options from 1mm to 2.5mm, depending on screw diameter
- Standard-fit nut: no more than 0.05mm backlash
- Transitional-fit nut: no more than 0.008mm backlash with optional slight preload
- Left-facing external nut threads available through the custom configurator
- Custom lengths and screw-end machining available through the custom configurator
Frequently Asked Questions
What are externally threaded nuts for ball screws?
Externally threaded ball screw nuts are cylindrical nuts with screw threads around part of their outside surface. The external threads allow the nut to mount directly into a matching internally threaded housing or machine component.
What is the difference between Grade 5, Grade 7, and Grade 10 ball screws?
Ball screw grades classify lead accuracy, meaning the permitted difference between intended and actual nut travel over a specified screw length. Grade 5 permits the least variation, Grade 7 permits a moderate amount, and Grade 10 permits more variation. The appropriate grade depends on the positioning accuracy, travel length, speed, load, and cost requirements of the application.
What does ball screw lead mean?
Lead is the axial distance the nut travels during one complete screw rotation. A smaller lead provides finer movement, while a larger lead produces more travel per rotation.
What does an externally threaded ball screw nut do?
An externally threaded nut has mounting threads around part of its outside surface. These threads allow the nut to screw directly into a matching internally threaded component.
What does right-facing external thread mean?
Right-facing means the externally threaded mounting section is positioned on the right side of the cylindrical nut when viewed in the product's standard orientation. Right-facing threads are standard for this collection.
Are left-facing externally threaded ball screw nuts available?
Yes. A nut with the externally threaded mounting section facing left can be selected through the custom configurator.
Why do these externally threaded ball screw nuts have no wipers?
The TRS nut design omits polymer wipers to maintain a compact externally threaded mounting profile. Applications exposed to debris may require separate contamination protection.
What is ball screw backlash?
Backlash is the small amount of free movement between the screw and nut when rotation reverses. Less backlash reduces lost motion during direction changes.
What is a standard-fit ball screw nut?
A standard-fit nut permits no more than 0.05mm backlash and normally has no intentional preload.
What is a transitional-fit ball screw nut?
A transitional-fit nut has less play than a standard-fit nut. It may range from no more than 0.008mm backlash to a slightly preloaded fit.
What is ball screw preload?
Preload is intentional internal pressure between the screw, recirculating balls, and nut. It reduces or eliminates looseness but can increase friction and required drive torque.
What screw diameters and leads are available?
These miniature ball screws are available in 6mm, 8mm, and 10mm diameters with 1mm, 2mm, and 2.5mm leads, depending on the selected screw diameter.
What is ball screw end machining?
End machining shapes one or both screw ends for installation. It may create journals, shoulders, threads, grooves, or other features needed for bearings, couplings, motors, or support blocks.
What is a ball screw journal?
A journal is a machined section at one or both screw ends that fits a bearing, coupling, motor, support block, or other mounting component.
What can be selected through the custom configurator?
The custom configurator can be used to select left-facing external nut threads, custom screw lengths, nut fit, and available screw-end machining.
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