HomeProductsMotion ControlActuators / AdjustersMicrometers 1" (25 mm) & 2" (50 mm) Travel, Differential Drive

1" (25 mm) & 2" (50 mm) Travel, Differential Drive


Manual Drives, 1" and 2" Differential Actuators

  • Compatible With A Wide Range of Stages
  • Coarse Travel & High Resolution Adjuster in One Package
  • Ø3/8" & Ø0.5" Mounting Barrels
  • Ideal For OEM Applications

Thorlabs offers a number or Manual Drives for use with RollerBlock Stages. These drives in paticular can be fitted to components with a standard 3/8" or 0.5" mounting barrel.


Item # DM12 DRV8
Coarse Adjustment Range 1.0" (25.4 mm) 2.0" (50.8 mm)
Coarse Adjustment Pitch 0.5 mm 0.5 mm
Fine Adjustment Range 250 µm 300 µm
Fine Adjustment Pitch 25 µm with 0.5 µm Graduations 0.05 mm with 1 µm Graduations


Manual Drives, 1" Differential Adjuster

  • Standard Ø3/8" Mounting Barrel
  • High Resolution as Well as Coarse
    Adjustment in One Small Package
  • Differential Adjustment Knob Graduated
    to Aid in Keeping Track of Position

The DM12 Differential Adjuster uses two leadscrews; one pushes the center spindle forward at 400 µm per revolution, while the other pulls it back at 375 µm per revolution. The resultant total forward motion of the center spindle is just 25 µm for each complete revolution of the graduated knob. Each small graduation of the fine control knob is 0.5 µm; the smallest incremental move for the DM12 is approximately 0.5 µm. The coarse travel is lockable via a thumbscrew located on the 3/8" mounting barrel. Also available is the DM10 1/2" Differential Adjuster.


Manual Drives, 2" Differential Adjuster

  • 2" (50 mm) Travel
  • Non-Rotating Tip
  • 0.5 µm Resolution
  • Ø1/2" (12.7 mm) Interchangeable Brass Mounting Bushing
  • Coarse Adjustment: 500 µm/rev
  • Fine Adjustment: 50 µm/rev

This differential drive has been designed for use with single-axis stages equipped with a Ø1/2" (Ø12.7 mm) actuator mounting clamp. The large-diameter differential drive actuator provides fine, ultra-smooth control over motion. The fine adjuster delivers 50 µm of travel per revolution with 1.0 µm graduations. The removable brass bushing allows this actuator to be used in any OEM application requiring 2" (50 mm) of overall travel.


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