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Starrett 3809MAC horizontal dial test indicator with 1.25 inch yellow dial and dovetail mount

Starrett

Starrett 3809MAC Horizontal Dial Test Indicator, 1.25 in Yellow Dial

SKU CH-FKQH-QG6A2

Horizontal dial test indicator with a 1.25 in yellow dial, 0.010 mm graduations and 0.8 mm range, supplied with dovetail mount attachments

  • 8 mm range covers small displacements
  • 010 mm graduations give fine resolution
  • 25 in yellow dial improves readability
  • 0-40-0 balanced dial shows direction
  • Horizontal style suits tight workspaces

Starrett 3809MAC Horizontal Dial Test Indicator

The Starrett 3809MAC is a mechanical horizontal dial test indicator built for precision measurement tasks. It features a 1.25 in yellow dial with a 0-40-0 reading format and metric graduations of 0.010 mm. The instrument includes dovetail mount attachments for flexible positioning on magnetic bases or height gauges.

Machinists and inspectors checking run-out

This indicator suits machinists and quality inspectors who need to check run-out, alignment or small dimensional variations within a 0.8 mm range. The horizontal layout works well when the dial face must be read from the side of a workpiece. Buyers who need a longer measuring range or a vertical dial orientation for direct top-down viewing should look at a different style of indicator.

0.8 mm measuring range with 0.010 mm graduations

The single specification that decides fit is the 0.8 mm measuring range combined with 0.010 mm graduations. This defines the total travel and resolution available for comparative measurements. The 2 mm and 4 mm contact points are included, and the Series 3809 design uses a horizontal dial with a 0-40-0 reading.

Highlights

  • 8 mm range covers small displacements
  • 010 mm graduations give fine resolution
  • 25 in yellow dial improves readability
  • 0-40-0 balanced dial shows direction
  • Horizontal style suits tight workspaces

Specifications

BrandSTARRETT

Questions about this item

Which dovetail mount attachment is needed to secure the 3809 indicator to a magnetic base?

The 3809MAC includes dovetail mount attachments that clamp directly to standard magnetic bases or height-gauge posts, so no separate dovetail accessory is required.

Will the 0.010 mm graduations on the 3809 match the resolution of my older 0.01 mm dial indicator?

Yes, the 3809MAC reads in 0.010 mm steps, which is the same resolution as a typical 0.01 mm indicator, allowing direct comparison of measurements.

How do I confirm the 1.25 in yellow dial is reading correctly after mounting the 3809?

Zero the needle with the contact point on a reference surface, then move the spindle a known distance; the 0-40-0 dial should advance one full revolution per 0.8 mm of travel.

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