• Back plunger type dial gauges are suitable for mounting onto leveling machine tool tables or inspection jigs, and for use in small spaces where the graduations of standard dial gauges are difficult to see.
  • Models 2960T, 2961T, 2990T-10 and 2991T-10, which use Mitutoyo’s proprietary shock-proofing mechanism, have excellent durability and shock resistance.
  • Model 2990T-10 provides 0.001mm graduation.

Back Plunger Dial Indicator

DIMENSIONS

Back Plunger Dial Indicator

* The shoulder on a contact point (standard accessory) for 2960T and 2961T acts as a stop to prevent spindle overrun that may otherwise damage the indicator. For this reason, if you need to install an optional contact point with an outside diameter smaller than 7mm, use a washer (with outside diameter of at least 7mm, inside diameter of 3mm, and thickness of approx. 0.5mm) placed between the contact point and the spindle.

Metric

Order No. Graduation Range (range/rev) Accuracy Repeatbility Dial reading Measuring force
Overall Retrace 1/10 Rev 1 Rev
2960T 0.01mm 1mm (1.27mm) 14µm 4µm 8µm — 3µm 50-0-50 1.4N or less
2990T-10 0.001mm 0.1mm (0.14mm) 5µm 2µm 2.5µm — 1µm 50-0-50 1.5N or less

* Completed products inspection is performed in the vertical position (contact point downward) and the stated accuracy is guaranteed.

Inch

Order No. Graduation Range (range/rev) Accuracy Repeatbility Dial reading Measuring force
First 1 Rev / 2.5 Rev / 10 Rev Retrace
2961T .0005” .04” / .05” ±.0005” / — / — .00016” ±.0001” 20-0-20 1.4N or less
2991T-10 .0001” .008” / .01” ±.0002” / — / — .0001” ±.00005” 4-0-4 1.5N or less

* Completed products inspection is performed in the vertical position (contact point downward) and the stated accuracy is guaranteed.

Metric

Back Plunger Dial Indicator

Inch

Back Plunger Dial Indicator

Back Plunger Dial Indicator

Holding bar (optional)

Order No. øD L
21AAA166 ø6mm 42mm
136567 ø6mm 81mm
124625 ø6.35mm 81mm
21AAA167 ø6.35mm 42mm
21AAA168 ø8mm 42mm
136568 ø8mm 81mm

* øD and L: detail shown in drawing below.