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The series 121-1 (2.1 inch diameter) permanent magnet DC motor is available to serve the industrial, instrumentation and automotive markets in either open-loop or close-loop applications. Rotor laminations are skewed to provide low cogging torque and no preferred rotor position. Standard catalog stall torque ratings are in the range of 19 to 180 oz-in, while no-load speed ranges from 2,100 to 8,000 rpm max. Encoders with line counts up to 2048, are available. Reliability is enhanced by long-life, pre-loaded ball bearings. Special windings and special shaft and mounting configurations are available to meet the requirements of OEM custom applications.
Unit of Measure

Specifications

Nominal Voltage

 N/A 24 V

Nominal No Load Speed (WNL)

 N/A 5500 rpm

Maximum No Load Current (INL)

 N/A 0.7 A

Nominal Load Speed (W)

 N/A 4800 rpm

Reference Load Torque (TL)

 N/A 13 in·oz

Maximum Load Current (IL)

 N/A 3.1 A

Reference Stall Torque (TS)

 N/A 107 in·oz

Reference Stall Current (IS)

 N/A 20 A

Nominal Terminal Resistance (RT)

 N/A 1.2 Ohms

Nominal Back EMF Constant (KE)

 N/A 4.3 V/krpm

Nominal Torque Constant (KT)

 N/A 5.9 in·oz/A

Maximum Dimension "A"

 N/A 3.6 in92 mm

Maximum Dimension "B"

 N/A 4.0 in102 mm
Encoder Option1 N/A C (100 Counts per Revolution) D (500 Counts per Revolution) M (1000 Counts per Revolution)

Maximum Overall Motor Length

 N/A 3.6 in4.6 in

Motor Speed

 N/A 16 (1600 rpm) 32 (3200 rpm) 48 (4800 rpm)

Direct Current (DC) Rated Voltage

 N/A 12 V24 V

Motor Type

 N/A Encoder Optional Motor Only Terminals

Typical Applications

 N/A Beverage Dispensing Cutting Tools Fans Gaming/Recreational Machines Medical Devices Plotters Printers Pumps Robotics

Standard Features

Standard Features

 N/A
  • Ball bearings
  • High starting torque
  • Precision die cast end bells
  • Class B rated
  • Reversible
  • Stainless steel output shafts

Optional Features

Optional Features

 N/A
  • Encoders up to 2048 CPR
  • Voltage ranges to 48 V DC
  • EMI noise suppression
  • Customized shafts
  • Customized lead harnesses
  • Custom mounting
  • Rear shaft extensions
  • Gearboxes
    • Planetary Ratios up to 2653:1
    • Spur 12:1; 48:1; 192:1; 768:1
  • 1 Others are Available.