1790 Series Tachometer Tester

The Model 1790 Tachometer Tester is used for testing and calibration of electrical and mechanical tachometer generators and indicators. A high-quality DC motor is coupled directly to a 1/4 inch square hole drive (AN Pad). This tachometer tester output can be converted to a wide variety of adapters and different tachometer interfaces. The motor drive control circuit uses SCR components and an open loop system for an economical solution to speed adjustment. The control panel consists of a five-digit LED display, momentary switches for start and stop, a direction switch, a display select switch, and a ten-turn potentiometer for speed adjustment.

  • 1790
Options available for


  • Percentage readout
  • Calibration Kit
  • Flexible Shaft
  • AN Pad to SAE Adapter for use with ratio adapters

View the Tachometer Tester Selection Matrix


PDF files will open in browser upon download.
PDF 1790 Tachometer Tester Data Sheet 116.2 kB - pdf DOWNLOAD

Standard Performance Specification & Features:

  • 250-10,000 RPM Tachometer Testing Range
  • 250-5,000 RPM Actual Drive Speed
  • ± 1 RPM Accuracy of Digital Display
  • Bright Red 5-Digit Display
  • Maximum Torque: 60 oz-in
  • Low Cost
  • direct-drive
  • Bi-directional
  • Ten-turn Speed Adjustment
  • Optional Calibration Kit Available