Ball Screws with Cylindrical Nuts
Ways to Order
Miniature ball screw with a cylindrical nut, 6mm diameter, 1mm lead, and 150mm length. The cylindrical nut creates a more compact assembly than a flanged nut. A multi-liner ball-return system supports smooth motion, while polymer wipers help keep debris out. Static axial load capacity is up to 2.144kN (482lb). Standard..
$131.21
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 Assembly with a Cylindrical Nut and a 500mm length, maximizing the travel distance. With a 10mm diameter and a 2mm lead, it's tailored for applications requiring extended reach without sacrificing precision or load capacity. Extended 500 mm length for maximum travel in the BSR series. 10 mm..
$165.52
Miniature Ball Screw Assembly with a Cylindrical Nut boasting an 8mm screw diameter for enhanced rigidity and a 1mm lead for fine motion control, all within a 150mm length. Enhanced design features include polymer wipers and a multi-liner ball return system. 8 mm diameter provides increased strength for higher load..
$131.21
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
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 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, 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
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
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, 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
Miniature ball screw with a cylindrical nut, 6mm diameter, 1mm lead, and 250mm length. The longer screw provides more travel while keeping a compact design. A multi-liner ball-return system supports smooth motion, and polymer wipers help keep debris out. The cylindrical nut fits into a matching housing, while a keyway..
$141.01
Miniature Ball Screw Assembly with a Cylindrical Nut offers a 250mm rail with an 8mm screw diameter and a 2.5mm lead, designed for applications requiring quick movement over longer distances within a minimal footprint. Extended 250mm length accommodates more extensive linear movements. The 2.5mm lead increases travel efficiency, ideal for..
$145.91
Miniature ball screw assembly, 8mm diameter, 2.5mm lead, 150mm length — delivering faster travel per revolution while maintaining precision in a compact form factor. BSR series with Grade 10 accuracy class for reliable linear motion in space-constrained applications. 8mm diameter with a unique 2.5mm lead for efficient and rapid positioning...
$134.15
Miniature Ball Screw Assembly with a 250mm length, an 8mm screw diameter and 1mm lead for precision positioning. The cylindrical nut design helps in the tightest of spaces. 250 mm length for increased linear travel in compact environments 8 mm diameter enhances the assembly's load-carrying capabilities Fine control with a..
$141.01
Miniature ball screw assembly with a 10 mm diameter, 2 mm lead, and 200 mm length, delivering precise, controlled linear motion in a compact form. The fine lead enables high positioning accuracy, while the robust design supports static axial loads up to 2.144 kN for strength and reliability. Built for..
$136.10
Ball screws with cylindrical nuts use a round, non-flanged ball nut that fits inside a matching housing for a more compact assembly than many flanged-nut designs. PBC Linear miniature ball screw assemblies are available with 6mm, 8mm, and 10mm screw diameters and 1mm, 2mm, or 2.5mm leads, depending on screw size. 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. The steel screw shafts are precision-rolled for consistent lead accuracy over the screw length.
Each cylindrical nut contains a multi-liner ball-return system that guides the recirculating balls through the nut for continuous, low-friction motion. Polymer wipers at both ends help block debris and retain lubrication around the internal ball tracks. Standard-fit nuts provide no more than 0.05mm backlash, while transitional-fit options reduce play and may apply slight preload for greater rigidity and more responsive direction changes. Assemblies support static axial loads up to 2.144kN (482lb), depending on the selected size and configuration. Custom screw lengths, nut fits, and journal machining are available through the custom configurator. A journal is the machined section at one or both screw ends that fits a bearing, coupling, motor, support block, or other mounting component.
- Compact cylindrical ball nut for installation inside a matching housing
- More space-efficient than many flanged-nut designs
- Available in 6mm, 8mm, and 10mm screw diameters
- Lead options of 1mm, 2mm, and 2.5mm, depending on screw size
- Precision-rolled steel screw shafts for consistent lead accuracy
- Multi-liner ball-return system for continuous ball recirculation
- Polymer wipers at both nut ends help block debris and retain lubrication
- Standard-fit nut: no more than 0.05mm backlash
- Transitional-fit nut available for reduced play and optional slight preload
- Static axial load capacity: up to 2.144kN (482lb)
- Custom lengths, nut fits, and journal machining available through the custom configurator
- A journal is the machined screw-end section that fits bearings, couplings, motors, support blocks, or other mounting components
Frequently Asked Questions
What is the difference between cylindrical and flanged ball screw nuts?
A cylindrical ball screw nut has a round body designed for installation inside a machine housing. A flanged nut has an external flange with bolt holes for direct attachment to a plate, carriage, or mounting block.
Why are cylindrical ball screw nuts used in compact assemblies?
The round nut body installs inside the machine structure instead of using an external mounting flange. This can reduce the space required around the nut and support a narrower assembly.
How is a cylindrical ball screw nut mounted?
A cylindrical ball screw nut installs inside a customer-designed or machine-specific housing that fits the nut body. The housing must also restrain the nut from rotating while allowing it to travel along the screw.
What is a keyway in a cylindrical ball screw nut?
A keyway is a narrow slot machined into the outside of the nut. A key or locating feature built into the machine housing fits into the slot to prevent the nut from rotating while allowing it to move linearly.
Does a cylindrical ball screw nut rotate during operation?
In a standard ball screw assembly, the screw rotates while the cylindrical nut is restrained from rotating and moves axially along the screw.
How is cylindrical ball screw nut rotation prevented?
Nut rotation can be prevented by a keyway or another locating feature incorporated into the machine housing. This restrains the nut while allowing linear travel.
What does precision-rolled mean for a ball screw?
A precision-rolled ball screw is made by forming the helical ball grooves into the steel shaft through a rolling process. This produces a consistent groove profile and defined lead accuracy.
What does a 2.144kN static axial load rating mean?
The static axial load rating is the maximum load applied along the screw axis that the assembly can support while stationary without permanent deformation of the ball tracks or rolling elements.
How do screw diameter and lead affect a miniature ball screw assembly?
Screw diameter affects rigidity, load capacity, and installation size. Lead determines how far the nut travels during one screw revolution, with smaller leads providing finer motion and larger leads providing more travel per rotation.
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