Ball Screw Linear Actuators
- Motor Sizes: NEMA 8 through NEMA 23
- Screw Diameters: 4 mm to 10 mm
- Leads: 1, 2, 2.5, 5 and 10 mm
- Screw Lengths: 50 mm to 500 mm
- MAX Horizontal Payload: 2.18 kN (490 lb)
Ball screw linear actuators combine a motor, helically threaded screw shaft, and recirculating ball nut with matching helical grooves to convert rotary motion into precise linear movement for moving and accurately positioning loads. Hardened steel balls circulate through the matching grooves in the screw shaft and ball nut, transmitting force through rolling contact rather than the sliding thread contact found in conventional lead screws. This mechanism reduces friction and wear while providing high mechanical efficiency, greater thrust per unit of drive torque, and repeatable positioning. In external-nut ball screw actuators, the motor rotates the screw while the restrained ball nut travels axially along the shaft, moving the attached load. Flanged ball nuts provide mounting points for a carriage or plate, while cylindrical nuts offer a more compact profile. Preloaded ball nuts can reduce axial play and increase rigidity and positioning accuracy.
PBC Linear ball screw linear actuators include the BS and BE Series, with NEMA 08, 11, 14, 17, and 23 motor frame sizes and ball screws from 6mm to 10mm in diameter. Lead options are 1mm, 2mm, and 2.5mm. Pre-assembled miniature ball screw actuators thus come in six standard diameter-and-lead combinations: 6mm × 1mm, 6mm × 2mm, 8mm × 1mm, 8mm × 2mm, 8mm × 2.5mm, and 10mm × 2mm. The BE Series expands the available configurations with additional motor lengths, leads, nut styles, grades, and performance combinations.
BS Series Grade 10 ball screws provide ±23µm/300mm accuracy, with standard backlash limited to 0.05mm maximum and optional preload for reduced axial play and increased stiffness. Polymer wipers at both ends of the ball nut help exclude debris and retain lubrication around the recirculating balls. Standard and custom journals can be machined on one or both screw ends to interface with bearings, couplings, motor connections, or supports. Fixed and floating end blocks are available to support the screw while accommodating alignment and thermal expansion. Flanged-nut BS configurations provide static axial load capacity up to 2.18kN (490lb).
- Ball screw linear actuators for controlled, load-carrying linear motion
- BS and BE Series external-nut actuator configurations
- NEMA 08, 11, 14, 17, and 23 motor frame sizes
- Screw diameters: 6mm, 8mm, and 10mm
- Lead options: 1mm, 2mm, and 2.5mm
- Cylindrical and flanged ball nut configurations
- BS Series Grade 10 accuracy: ±23µm/300mm
- BS Series standard backlash: 0.05mm maximum; preload optional
- BS Series flanged-nut static axial load capacity up to 2.18kN (490lb)
- Polymer wipers help exclude debris and retain lubrication
- Standard and custom machined journals available on one or both screw ends
- Fixed and floating end blocks available for screw support, alignment, and thermal expansion
- BS Series standard sizes: 6mm × 1mm, 6mm × 2mm, 8mm × 1mm, 8mm × 2mm, 8mm × 2.5mm, and 10mm × 2mm
Browse Product Families
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Ball Screw Linear Actuators with Cylindrical Nuts - BS Series
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Ball Screw Linear Actuators with Flanged Nuts - BS Series
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Ball Screw Linear Actuators - BE Series
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Integrated Step-Servo Ball Screw Actuators - TSM Series
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Products (77)
Miniature ball screw linear actuators with cylindrical nuts are motor-driven ball screw devices that convert rotary motion into precise linear movement using compact BSR miniature ball screws in 6 mm, 8 mm, and 10 mm screw diameters. Factory-integrated with NEMA 08, 11, 14, 17, and 23 motors, these actuators use cylindrical nut configurations to save space compared with flanged nut designs. These are external ball screw actuator systems because the cylindrical nut travels outside the motor along the exposed screw.
*Full dimensions shown on individual product pages
| Name | Motor | Dia. mm | Lead mm | Length mm | Static Axial Load (N) | Price | Actions |
|---|---|---|---|---|---|---|---|
| BSR0601ATXR-0250-CNS-111-NNN-N | N11 | 6 | 1 | 250 | 135 | $297.22 | Shop |
| BSR0601AT7R-0250-CNS-111-NNN-N | N11 | 6 | 1 | 250 | 135 | $291.04 | Shop |
| BSR0801AT7R-0150-CNS-171-NNN-N | N17 | 8 | 1 | 150 | 320 | $237.84 | Shop |
| BSR0601AT7R-0150-CNS-140-NNN-N | N14 | 6 | 1 | 150 | 320 | $257.21 | Shop |
| BSR0601AT7R-0250-CNS-140-NNN-N | N14 | 6 | 1 | 250 | 320 | $268.98 | Shop |
| BSR0601AT7R-0150-CNS-111-NNN-N | N11 | 6 | 1 | 150 | 135 | $279.27 | Shop |
| BSR08025T7R-0250-CNS-140-NNN-N | N14 | 8 | 2.5 | 250 | 320 | $268.98 | Shop |
| BSR0801AT7R-0150-CNS-140-NNN-N | N14 | 8 | 1 | 150 | 320 | $257.21 | Shop |
| BSR0801AT7R-0250-CNS-140-NNN-N | N14 | 8 | 1 | 250 | 320 | $268.98 | Shop |
| BSR08025T7R-0150-CNS-140-NNN-N | N14 | 8 | 2.5 | 150 | 320 | $257.21 | Shop |
Ball screw linear actuators with rectangular flanged nuts are motor-driven devices that convert rotary motion into precise linear movement using compact BSR miniature ball screws in 6 mm, 8 mm, and 10 mm screw diameters. 5 mm lead options. The rectangular flanged nut provides a flat mounting surface for direct attachment to plates, blocks, or carriage structures, making installation easier while improving load connection and resistance to nut rotation during axial travel.
*Full dimensions shown on individual product pages
Ball screw linear actuators use a programmable stepper motor, precision ball screw, and recirculating ball nut to convert controlled motor rotation into accurate linear movement. In an external-nut configuration, the motor rotates the ball screw while the restrained nut travels axially in a straight line. The programmable stepper motor controls the actuator’s position, travel speed, acceleration, timing, direction, and number of revolutions, while external guidance supports the load and prevents nut rotation.
*Full dimensions shown on individual product pages
| Name | Motor | Dia. mm | Lead mm | Length mm | Nut | Amps | Price | Actions |
|---|---|---|---|---|---|---|---|---|
| BE176S-B0802-125-AK1-0-200 | N17 | 8 | 2 | 125 | AK1 | 2 | $451.77 | Shop |
| BE238S-B1002-100-AK1-0-220 | N23 | 10 | 2 | 100 | AK1 | 2.2 | $434.05 | Shop |
| BE238S-B1010-125-BM1-0-220 | N23 | 10 | 10 | 125 | BM1 | 2.2 | $557.13 | Shop |
| BE143S-B0801-75-AK1-0-150 | N14 | 8 | 1 | 75 | AK1 | 1.5 | $383.61 | Shop |
| BE143S-B0805-125-BU1-0-150 | N14 | 8 | 5 | 125 | BU1 | 1.5 | $506.67 | Shop |
| BE172S-B0802-125-AK1-0-200 | N17 | 8 | 2 | 125 | AK1 | 2 | $446.35 | Shop |
| BE111S-B0601-50-AK1-0-100 | N11 | 6 | 1 | 50 | AK1 | 1 | $350.41 | Shop |
| BE111S-B0602-100-AK1-0-100 | N11 | 6 | 2 | 100 | AK1 | 1 | $415.36 | Shop |
Integrated step-servo ball screw actuators combine a hybrid step motor, ball screw, drive, and motion controller in a compact package for controlled linear motion. In the TSM Series, the ball screw is integrated directly with the motor shaft while the ball nut is mounted externally. As the motor rotates the screw, the external nut travels linearly along the screw to move the connected load.
*Full dimensions shown on individual product pages
| Name | Motor | Dia. mm | Lead mm | Length mm | Peak Thrust @ 24 V (N) | Price | Actions |
|---|---|---|---|---|---|---|---|
| TSM17Q-2RG-B0802-105-A1P-0 | NEMA 17 | 8 | 2 | 105 | 950 | $995.43 | Shop |
| TSM23Q-2RG-B1002-155-A1P-S | NEMA 23 | 10 | 2 | 155 | 2200 | $1,042.59 | Shop |
| TSM11Q-2RM-B0602-105-A1P-0 | NEMA 11 | 6 | 2 | 105 | 230 | $803.08 | Shop |
| TSM11Q-2RM-B0602-55-A1P-0 | NEMA 11 | 6 | 2 | 55 | 230 | $790.90 | Shop |
| TSM11Q-2RM-B0601-105-A1P-0 | NEMA 11 | 6 | 1 | 105 | 440 | $776.64 | Shop |
| TSM08X2L-R-B0401-55-A1P-0 | NEMA 08 | 4 | 1 | 55 | 220 | $938.37 | Shop |
| TSM11Q-2RM-B0601-55-A1P-0 | NEMA 11 | 6 | 1 | 55 | 440 | $765.23 | Shop |
The assemblage of screw, nut, and NEMA motor series combine to create a high-performance linear ball screw driven actuator.
- Five frame sizes: NEMA 08/11/14/17/23
- Flanged and cylindrical nut configurations
- Preload option for higher rigidity and better positional accuracy
- Polymer wipers located at each end of the nut help prevent the ingress of debris and particulates
- Standard and special machined journals available (fixed or floating)
- Fixed and floating end blocks available
What is a motorized ball screw actuator?
What are miniature ball screw actuators used for?
What are the advantages of ball screw actuators?
What is the difference between a ball screw and a lead screw?
What does preload mean in a ball screw actuator?
How do you choose a ball screw actuator?
What is a NEMA stepper motor?
What are fixed and floating bearing configurations?
What is the benefit of integrated linear actuators?
When should you choose a customizable actuator instead of a standard one?
Ball Screw Linear Actuators with Cylindrical Nuts - BS Series
What are external lead screw and ball screw actuator systems?
Why would one choose cylindrical nuts for a ball screw assembly?
What is preload in a lead screw or ball screw assembly?
Integrated Step-Servo Ball Screw Actuators - TSM Series
What is the difference between a step-servo ball screw actuator and a standard stepper ball screw actuator?
Does the ball screw move in an integrated ball screw actuator?
What does an integrated drive and controller eliminate?
What is the difference between a ball screw and a lead screw in a linear actuator?
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Ball Screw Linear Actuators with Cylindrical Nuts - BS Series
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Ball Screw Linear Actuators with Flanged Nuts - BS Series
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Ball Screw Linear Actuators - BE Series
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Integrated Step-Servo Ball Screw Actuators - TSM Series
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