Mahr 840 FM Indicating Snap Gages


Mahr Indicating Snap Gages 840 FM MaraMeter M with measuring  jaws.

For diameters of small hubs, registers, shoulders on shafts and groove widths as well as for tooth span Wk as indirect, reference-free determination of tooth thickness on spur gears with straight and helical teeth.

Indicator sold seperately

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Mahr 840 FM Indicating Snap Gages Features:

  • Rugged, forged steel frame with heat insulators
  • Measuring spindle is mounted in long guide way with lever controlled retraction
  • Anvil spindle can easily be fine adjusted
  • Maximum wear resistance due to non-contact positioning in conjunction with carbide tipped measuring faces
  • Measuring spindle and anvil spindle made of hardened stainless steel; with extending carbide-tipped measuring jaws
  • Constant measuring force as a result of built-in spring, thus eliminating user influence
  • Universally applicable and extremely versatile, each instrument spans a broad measuring range, within this range any dimension and fit can be very quickly and easily adjusted
  • Flatness of Measuring Faces ≤ 0.5uM
  • Parallelism Of Measuring Faces ≤ 3uM (≤2uM on the 0-40mm model)
  • Tooth Span Measurements as per module m .5 on the 40mm/80mm models and 1.0 for 130/180mm models

Indicator sold separately.


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Mahr 840 FM Indicating Snap Gages Technical Specifications:

Mahr Federal 840FM Indicating Snap Gage for Tooth Span tech specs
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Download the Mahr  840 FM Indicating Snap Gages product information:


Mahr Federal 840FM Indicating Snap Gage for Tooth Span Accessories_Dial Comparators for Mahr Federal Snap Gages
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