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Differential Screw Adjusters

Differential Screw Adjusters

  • Coarse and fine drivers combined
  • Sensitivity = 1micron
  • Available with 4.5 to 23.5mm travel
  • Two types - mirror adjusters or micrometer replacements

 

These co-linear differential adjustment screws combine the ability to translate over long distances with the precision of a differential thread for fine motion. An outer ring controls the coarse motion and is uncalibrated while an inner thimble operates the differential driver. The thimble is marked around its circumference with divisions equivalent to 1micron of travel. The differential driver can be operated at any point of the coarse motion.


Three lengths of travel, 4.5, 7 and 10mm, are offered for use as mirror adjusters. These are fitted with an M14 thread for direct attachment to mirror mounts. Two lengths of travel, 7 and 23.5mm, are offered as micrometer replacements. These are fitted with an M10 thread which will take the place of most micrometer fittings.

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TypeTravel (mm)Dimensions toleranceMaterialSensitivityCoarse AdjustmentFine SensitivitySensitivithy
Mirror Adjuster4.5±0.2mmStainless Steel & Brass-500µm/turn50µm0.001mm
Mirror Adjuster7±0.2mmStainless Steel & Brass-500µm/turn50µm0.001mm
Mirror Adjuster10±0.2mmStainless Steel & Brass-500µm/turn50µm0.001mm
Micrometer replacement7±0.2mmStainless Steel & Brass-500µm/turn50µm0.001mm
Micrometer replacement10±0.2mmStainless Steel & Brass-500µm/turn50µm0.001mm

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