• Standard Ø3/8" (Ø9.5 mm) Mounting Barrel
• High Resolution as Well as Coarse Adjustment in One Small Package
• Differential Adjustment Knob Graduated to Aid in Keeping Track of Position
• Coarse Adjustment: 0.5 mm per Revolution
• Fine Adjustment: 25 μm per Revolution

The T-DM12 Differential Adjuster uses two leadscrews; one pushes the center spindle forward with 400 μm per revolution, while the other pulls it back with 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 Ø3/8" (Ø9.5 mm) mounting barrel, and when unlocked provides coarse adjustment of 0.5 mm per revolution. Also available is the DM10 1/2" Differential Adjuster. 

If the fine adjustment knob on the T-DM12 is ever removed from the actuator body, it can be reattached.