Metrology
Metrology
MaraMeter 844 NR Self-centering dial bore gage
EN
  • Measuring head consists of a carbide-tipped, movable measuring bolt and an opposing interchangeable stationary anvil with carbide ball
  • Stationary measuring bolt can pivot through 180°, giving rise to a very long return travel path of up to 40% of the bore to be measured
  • Movements of the measuring bolt are transmitted to the indicating instrument via the ring segment
  • The broad centering bridge ensures automatic centering in the bore
  • Insensitive to temperature due to both the shaft and the transfer rod being made from Invar steel
  • Carbide tipped measuring contacts for high wear resistance
  • Constant measuring force thanks to inbuilt measuring force spring. Measurement results are therefore independent of personal sense of touch
  • Universally applicable. Every instrument spans a broad measuring range. Within this range it is quick and easy to adjust to any size
  • Invar steel makes the inside measuring device insensitive to temperature influences of any kind. Body heat from the user or a rise in ambient temperature in the workplace have virtually no influence on measuring results.
  • Technical data

Order no.Product typeMeasuring range mmMeasuring range inchesRepeatability fw (µm)Error limit Ge (µm)Measuring depth mm
4474580
844 NR
50 - 70
2 - 2.8"
1 µm
2 µm
60 mm
4474590
844 NR
60 - 100
2.4 - 4"
1 µm
2 µm
60 mm
4474600
844 NR
80 - 150
3.2 - 6"
1 µm
2 µm
95 mm
4474610
844 NR
120 - 220
4.7 - 8.7"
1 µm
2 µm
107 mm
4474620
844 NR
180 - 360
7.1 - 14.2"
1.5 µm
3 µm
148 mm
4474630
844 NR
290 - 530
11.4 - 20.7"
1.5 µm
3 µm
170 mm