28LT12

28LT12 Brush DC Coreless Motor

28LT12

The 28LT12 is a cost efficient solution for applications requiring acceleration (start/stop) with a long brush lifetime.

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 28LT12-219.49 28LT12-416E.49
Motor Diameter (in) 1.102 1.102
Motor Diameter (mm) 28 28
Shaft Play - Axial (in) 0.0059 0.0059
Shaft Play - Axial (mm) 0.15 0.15
Shaft Play - Radial (in) 0.0007 0.0007
Shaft Play - Radial (mm) <0.018 <0.018
Back EMF Constant (V/1000 rpm) 2.24 4.26
Continuous Current, Max (A) 1.13 0.63
Continuous Torque, Max (mNm) 23 24
Continuous Torque, Max (oz-in) 3.26 3.4
Mechanical Time Constant (ms) 13.9 21.4
Motor Regulation (10³/Nms) 13.4 12
No-Load Current, Typical (mA) 65 35
No-Load Speed (rpm) 7860 7345
Nominal Voltage (V) 18 32
Rotor Inertia (gcm²) 10.7 17.8
Rotor Inertia (oz-in-sec² 10ˉ⁶) 151.471 251.98
Torque Constant (mNm/A) 21.4 40.7
Torque Constant (oz-in/A) 3.03 5.76
Weight (g) 135 135
Weight (oz) 4.76 4.76
Ambient Operating Temperature, Max: Rotor (°C) 100 100
Ambient Operating Temperature, Max: Rotor (°F) 212 212
Ambient Operating Temperature Range: Motor (°C) -30 to 85 -30 to 85
Ambient Operating Temperature Range: Motor (°F) -22 to 185 -22 to 185
Continuous Speed, Max (rpm) 10000 10000
Efficiency 72% 73%
Friction Torque (mNm) 1.39 1.42
Friction Torque (oz-in) 0.197 0.201
Output Power (W) 19 20
Rotor Inductance (mH) 0.5 2.4
Shaft Load, Max - Axial (5 mm. from bearing) (N) 6 6
Shaft Load, Max - Axial (5 mm. from bearing) (oz) 21.6 21.6
Shaft Load, Max - Radial (5 mm. from bearing) (N) 250 250
Shaft Load, Max - Radial (5 mm. from bearing) (oz) 899.2 899.2
Stall Torque at Nominal Voltage (mNm) 63 65
Stall Torque at Nominal Voltage (oz-in) 8.92 9.2
Terminal Resistance (Ohm) 6.15 19.9
Thermal Resistance (rotor/body) (°C/W) 5 / 12 5 / 12
Thermal Time Constant (rotor/stator) (s) 27 / 760 27 / 760
Document Document Type Language File Type
28LT12 Specification Page Specification Page
28LT12 drawing 2D Drawing
28LT12 3D drawing 3D Drawing
Portescap MotionCompass: Guide to Interactive Motor Selection (brochure) Brochure