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2" (50 mm) Motorized Actuators

  • Piezo Inertia or Stepper Actuators with 50 mm of Travel
  • High Load Capacities
  • No Backlash

Application Idea

Three LNR50DD Stages
in XYZ Configuration
with DRV014 Motors


50 mm Travel
Stepper Motor Actuator


50 mm Travel
Piezo Inertia Actuator

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Piezo Inertia Actuator with 50 mm Travel

Required Controller

  • Four Output Channels, Single- or Dual-Channel Operation
  • Standalone Control via Top Panel or PC-Control via USB Plug and Play
  • Voltage Output from 85 V to 125 V


  • Compact Design, 31.5 mm x 17.0 mm (W x H)
  • Piezo Inertia Actuator Offers 20 nm Typical Step Size
  • Manual Adjustment via Rear-Located Thumbscrew
  • 125 V Maximum Operating Voltage
  • Compatible with Translation Stages using 3/8"-40 Thread or 3/8" Mounting Block
  • Also Available in 10 mm, 13 mm, and 25 mm Travel Versions
  • Ideal for Set-and-Hold Applications that Require Relative Positioning with High Resolution
  • Control Cable can be Adjusted up to 110° for Space-Constrained Applications
Item # PIA50
Travel 50 mm
Typical Step Sizea 20 nm
Maximum Step Sizeb <30 nm
Step Size Adjustabilityc ≤30%
Maximum Step Frequencyd 2000 Hz
Backlash None
Maximum Axial Preloade 25 N
Recommended Maximum
Axial Load Capacityf
2.5 kg (5.51 lbs)
2 mm/min (Typical)
<3.5 mm/min (Maximum)
Drive Screw 1/4"-80 Thread, Hard PVD Coated
Motor Type Piezoelectric Inertia
Mounting Options Ø3/8" (9.5 mm) Barrel
3/8"-40 Threaded Barrel
Operating Temperature 10 to 40 °C (50 to 104 °F)
Dimensions 3.80" x 1.24" x 0.67”
(96.6 mm x 31.5 mm x 17.0 mm)
Cable Length 1.0 m (3.28')
Connector SMC, Female
Compatible Controller KIM101
  • This value can vary over 20% due to component variance, change of direction, and application condition.
  • This can be adjusted up to 30% in both directions using the KIM101 Controller and Kinesis Software.
  • This can be adjusted using the KIM101 Controller and Kinesis Software.
  • Using the KIM101 Inertia Piezo Controller
  • The axial force applied to the drive tip to achieve the specified step size. A minimum of 5 N is recommended to enhance stepping behavior.
  • A higher maximum load is possible but it may adversely affect the typical step size.

Thorlabs' PIA50 Piezoelectric Inertia Actuator provides high-resolution linear motion control with a long piezo-controlled translation range in a compact package. It can support loads up to 2.5 kg (5.51 lbs) and preloads up to 30 N with typical movements of 20 nm and no backlash. The step size can be adjusted up to 30% to a maximum of approximately 30 nm using the KIM101 Controller and Kinesis® software. However, due to the open-loop design, hysteresis, and application conditions, the achieved step size of the system can vary over 20%. An external feedback system will need to be used to overcome this variance.

This actuator has a 3/8" (9.5 mm) mounting barrel with a 3/8"-40 thread on the front of the barrel for compatibility with our wide range of translation and rotation stages. For compatibility with 1/4"-80 threaded mirror mounts see our 10 mm travel piezo inertia actuator. The actuator is self-locking when at rest and when there is no power supplied to the piezo, making the actuator ideal for set-and-hold applications that require nanometer resolution and long-term alignment stability. Manual adjustments can be made at any time, as long as the piezo is not actively translating the screw, by using the rear-located thumbscrew or with a 5/64" (2 mm) hex key. 

Inertia Motor
Click for Details

The Control Cable Can be Adjusted up to 110° for Space-Constrained Applications

Powered by a 10 mm (0.39") long discrete piezo stack, the actuator can operate at speeds of up to 3.5 mm/min. The design of the piezo motor will rotate the tip of the lead screw during translation. As shown in the image to the right, the control cable for each actuator can be rotated up to 110° for space-constrained applications.

For information on the design of our piezo inertia "slip-stick" motor actuators, please see the complete presentation here.

Required Controller
The KIM101 Controller is required to operate our PIA50 Piezo Inertia Actuator; the actuator cannot be operated using a standard piezo controller. The KIM101 has an internal sawtooth voltage signal generator capable of sending sub-millisecond pulses (steps) with controllable amplitudes from 85 V to 125 V. The driver features four channels and is capable of single- or dual-channel operation, making the controller ideal for applications involving multiple motorized actuators, such as beam steering.

For more information, please see the full web presentation.

Posted Comments:
No Comments Posted
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PIA50 Support Documentation
PIA50Piezo Inertia Actuator, 50 mm Travel, Mounting: 3/8"-40 Thread and 3/8" Barrel

Stepper Motor Actuator with 50 mm Travel

Recommended Controllers
BSC201 or BSC203

  • 409,600 Microsteps per Revolution
  • 48 V Output at 25 W
  • Trapezoidal and
    'S-Curve' Velocity Profiles


  • Specifically Designed to be Used with the LNR50 TravelMax™ Stage
  • <1 µm Bidirectional Repeatability
  • Maximum Load Capacity: 48 lbs (22 kg)
  • Preload to Eliminate Backlash
  • Non-Rotating Tip
  • 25 mm Travel Version also Available
Item # DRV014
Travel 50 mm (1.97")
Bidirectional Repeatability <1 µm
Maximum Load Capacity 48 lbs (22 kg)
Maximum Speed (Default)a 20.0 mm/s
Full Step Angle 1.8°
Step Angle Accuracy 5%
Rated Phase Current 1 A
Phase Resistance 3.6 Ω
Phase Inductance 4.6 mH
Holding Torque 23.1 N•cm
Detent Torque 1.7 N•cm
Rotor Inertia 32 g•cm²
Insulation Class B
Limit Switches Ceramic Tipped,
Leadscrew Pitch 1 mm Pitch, Trapezoidal
Motor Type 2-Phase Stepper
Microsteps per Revolution 409,600
Min Incremental Movementb
50.0 nm
Mounting Barrel Ø1/2" (12.5 mm)
Weight (Actuator) 1.8 lbs (0.8 kg)
Compatible Controllers BSC201, BSC202, BSC203,
or MST602
  • This is the maximum speed set by default when the acutator is used with one of our stepper motor controllers. By adjusting settings on the controller, the maximum speed may be increased to a maximum 50 mm/s.
  • Valid if used with a Thorlabs stepper motor controller.

The DRV014 offers 50 mm (1.97") of travel and a bidirectional repeatability better than 1 μm. When used with one of our Stepper Motor Controllers, such as our Benchtop Controllers, the DRV014 can achieve a minimum incremental movement better than 50 nm, and a 20 mm per second maximum speed.

The hybrid stepper motor, with its rotor that consists of 50 individual magnetic teeth, is ideally suited for micro-stepping applications. Aside from the obvious increase in resolution resulting from increasing the steps per revolution from 200 to 409,600, micro-stepping also ensures smoother low speed motion by allowing the discrete 1.8° step size which produces mechanical noise to be reduced to much smaller steps with inherently lower resultant vibrational noise.

The DRV014 Stepper Motor drive has been equipped with a trapezoidal screw thread for a cleaner, more wear resistant operation than is available from standard threading. It is capable of driving loads as high as 55 lbs (25 kg). The use of a trapezoidal lead screw in the DRV014 provides a number of benefits over the more common Acme style thread. The benefits are an improved durability, a lower friction due to improved surface quality, and nearly no back-drive.

This actuator is compatible with our 2" TravelMax manual stages. To use the DRV014 with these stages, mount the motor to the side of the stage using two M4 x 40 cap screws (included).

Inertia Motor
Click to Enlarge

A 3-axis LNR50DD 2" travel stage shown with the manual adjusters replaced by DRV014 actuators.

Pin Diagram

High-Density D-Type Male 15 Pin Connector

15-Pin D-Sub Connector Pin Out

Pin Description Pin Description
1 Limit Ground/Returna 9 Reserved for Future Use
2 CCW Limit Switch 10 Reserved for Future Use
3 CW Limit Switch 11 Reserved for Future Use
4 Motor Phase B- 12 Reserved for Future Use
5 Motor Phase B+ 13 Reserved for Future Use
6 Motor Phase A- 14 Reserved for Future Use
7 Motor Phase A+ 15 Braid/Screen Ground
8 Reserved for Future Use  -  -
  • The limit ground wire is connected to the motor body.
Connectors Terminating the Converter Cable
Click to Enlarge

High-Density D-Type Male 15 Pin Connector

Posted Comments:
wmwu  (posted 2016-02-29 19:00:04.997)
Dear Officer, Is "Stepper Motor Drive (DRV014)" able to connect to the "Translation Stage(PT1A)", and to control its motion? Thanks very much. Best regards, Alan
bwood  (posted 2016-03-01 04:06:43.0)
Response from Ben at Thorlabs: Thank you for your feedback. Unfortunately, the DRV014 is not compatible with the PT1A. Among other reasons, the DRV014 barrel size is too large (Ø12 mm) for the PT1A (Ø9.5 mm). The recommended stage to pair with the DRV014 are the 50 mm TravelMax™ stages, and the recommended actuators for the PT1A can be found under the "Actuator" tab on the PT1 series web page.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
DRV014 Support Documentation
DRV01450 mm Trapezoidal Stepper Motor Drive
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