The 2100 Series Dazic Zero Speed Switches are electromechanical rotary motion controls requiring no electrical input to operate. It is ideal for shaft input speeds of 4 to 2000 RPM.

2100 Series Zero Speed Switch

Operating Range: 4 to 2000 RPM

The 2100 Series Zero Speed Switches are electromechanical rotary motion controls requiring no electrical input to operate.

These switches are designed for systems that have a high RPM.

These shaft-driven devices can let you know if equipment is running too fast, too slow, or not at all. These UL-approved speed switches can be interlocked as part of a material handling system to ensure that if one machine fails, the entire operation will stop, avoiding an expensive and time-consuming pile-up of material and potential breakage of equipment.

  • For shaft input speeds of 4 to 2000 RPM.
  • Will operate in temperatures ranging from -40° F to +250° F (-40° C to +482° C).
  • NEMA 4/4X housings are painted with an epoxy-based powder coat to provide corrosion resistance as well as protection against dust, rain and hose-directed water.

The DAZIC Speed Switch devices coupled to a corresponding shaft, must be properly mounted and aligned to avoid putting extra load on DAZIC bearings and help prevent any premature failure caused by improper installation. 

The use of installation accessories such as Mounting Brackets and K-Couplings provide a secure foundation and eliminate misalignment connection problems. The DAZIC installation accessories are designed specifically for our speed switches to ensure its optimal operations.

Click here if you want to learn more about our recommended installation accessories that work perfectly with our DAZIC speed switches.

Need assistance choosing the appropriate DAZIC speed switch? Fill out the Application Data Sheet and a Sales Engineer will get back to you to help you choose which switch is right for your specific application.

Dazic® Application Data Sheet
2100 Series
Driver Shaft-to-shaft
Shaft Diameter 1/2″ (1.27 cm)
Operating Range 4 to 2000 RPM
Driver Torque Required .0208 ft-lb (4 in-oz) (.0282 Nm)
Temperature Tolerance -40°F to +250°F (-40°C to +121°C)
Housing Options Aluminum (AL) or Cast Iron (CI)
NEMA Rating 4/4x
Mounting Options Base, Flange or Flange with pilot
Dimensions (L x W x H) 6″ x 4-1/4″ x 3-15/16″ (15.29 cm x 10.80 cm x 9.53 cm)
Wiring Contact Options SPDT, DPDT, SPDT(2)
Weight AL – 4 lbs. (1.81 kg)      CI – 8 lbs. (3.63 kg)


It takes just 5 clicks to fill out our Data Application sheet. Our Sales Engineer can then recommend the best speed switch for your specific needs.