28DT12

28DT12 Brush DC Coreless Motor

28DT12 Brush DC Coreless Motor

28DT12

The 28DT12 brush DC motor is a cost efficient solution for applications requiring acceleration (start/stop) with a long brush life time.

Product Highlights

  • Ironless construction
  • Alnico magnet for high performance
  • Graphite/copper commutation
  • Long brush life
  • Winding possibilities
  • Low self heating

Customization Available

  • Cable or terminal outputs
  • Coil modifications - resistance and inductance
  • Custom shafts - flats, knurling, diameter, length
  • Fixation holes
  • Sleeve or ball bearings

Part Number 28DT12-219E.1 28DT12-219P.1 28DT12-222E.1 28DT12-222P.1
Motor Diameter (in) 1.102 1.102 1.102 1.102
Motor Diameter (mm) 28 28 28 28
Shaft Play - Axial (in) 0.0059 0.0059 0.0059 0.0059
Shaft Play - Axial (mm) 0.15 0.15 0.15 0.15
Shaft Play - Radial (in) 0.0001 0.0001 0.0001 0.0001
Shaft Play - Radial (mm) <0.025 <0.025 <0.025 <0.025
Back EMF Constant (V/1000 rpm) 3.95 2.04 3.4 1.7
Continuous Current, Max (A) 1.1 2 1.4 2.5
Continuous Torque, Max (mNm) 37 36 41 37
Continuous Torque, Max (oz-in) 5.24 5.1 5.81 5.24
Mechanical Time Constant (ms) 12.6 14.4 12 14
Motor Regulation (10³/Nms) 7 7.6 5.9 7.2
No-Load Current, Typical (mA) 90 180 110 210
No-Load Speed (rpm) 6870 7100 6851 6840
Nominal Voltage (V) 28 15 24 12
Rotor Inertia (gcm²) 18 18 20 20
Rotor Inertia (oz-in-sec² 10ˉ⁶) 254.812 254.812 283.124 283.124
Torque Constant (mNm/A) 37.7 19.5 32.5 16.2
Torque Constant (oz-in/A) 5.34 2.76 4.6 2.29
Weight (g) 200 200 200 200
Weight (oz) 7.05 7.05 7.05 7.05
Ambient Operating Temperature, Max: Rotor (°C) 100 100 100 100
Ambient Operating Temperature, Max: Rotor (°F) 212 212 212 212
Ambient Operating Temperature Range: Motor (°C) -30 to 85 -30 to 85 -30 to 85 -30 to 85
Ambient Operating Temperature Range: Motor (°F) -22 to 185 -22 to 185 -22 to 185 -22 to 185
Continuous Speed, Max (rpm) 9000 9000 9000 9000
Efficiency 68% 66% 69% 67%
Friction Torque (mNm) 3.4 3.4 3.4 3.4
Friction Torque (oz-in) 0.481 0.481 0.481 0.481
Output Power (W) 24 24 27 24
Rotor Inductance (mH) 1.1 0.3 0.75 0.2
Shaft Load, Max - Axial (5 mm. from bearing) (N) 8 8 8 8
Shaft Load, Max - Axial (5 mm. from bearing) (oz) 28.8 28.8 28.8 28.8
Shaft Load, Max - Radial (5 mm. from bearing) (N) 500 500 500 500
Shaft Load, Max - Radial (5 mm. from bearing) (oz) 1798.5 1798.5 1798.5 1798.5
Stall Torque at Nominal Voltage (mNm) 107 101 126 102
Stall Torque at Nominal Voltage (oz-in) 15.15 14.3 17.84 14.44
Terminal Resistance (Ohm) 9.9 2.9 6.2 1.9
Thermal Resistance (rotor/body) (°C/W) 3.5 / 8 3.5 / 8 3.5 / 8 3.5 / 8
Thermal Time Constant (rotor/stator) (s) 18 / 630 18 / 630 18 / 630 18 / 630
Document Document Type Language File Type
28DT12 Specification Page Specification Page
28DT12 drawing 2D Drawing
28DT12 3D drawing 3D Drawing
Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) Brochure