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20DBM-K High Power Stepper Linear Actuator

20DBM-K - 20DBM-K High Power Stepper Linear Actuator

20DBM-K

The 20DBM-K high resolution captive stepper linear actuators are tailored for demanding applications that need smaller move increments and finer positioning.With 7.5 deg step angle,these linear actuators can deliver a high linear force up to 50N. Larger ball bearings with patent pending pre-load design support higher load capacity & repeatability.

Motor Highlights

  • High grade Neo magnet

  • Compact design

  • Winding possibilities

  • Larger ball bearings

  • Improved heat dissipation

  • Optimized preload

Customization Available

  • Longer / shorter stroke lengths
  • Winding
  • Cable and connectors
  • Ball bearings
  • Preload / axial play
  • Adaptor / extension tips
  • Mounting plate

Applications

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Specification + Detail
Resources
Metric English 
Document Technology Document Type Language File Type
20DBM-K Specification Sheet Linear Stepper Actuator Specification Page  
20DBM-K Drawing Linear Stepper Actuator DXF Drawing  
20DBM-K 3D Drawing Linear Stepper Actuator 3D  
20DBM (Brochure) Linear Stepper Actuator Literature  
Winding{%|%}unit 20DBMXXD3B-K 20DBMXXD4B-K 20DBMXXD1B-K 20DBMXXD2B-K
Diameter{%|%}in 0.79 0.79 0.79 0.79
Diameter{%|%}mm 20.0 20.0 20.0 20.0
Length (mm)
Length (in)
Operating Voltage #{%|%}V 2.90 1.40 5.00 12.00
Resistance per Phase, ± 10%{%|%}Ohms 5.7 1.4 17.5 100.5
Inductance per Phase, typ{%|%}mH 2.4 0.5 7.0 45.0
Nominal Phase Current, 2 ph. On (A)
Nominal Phase Current, 1 ph. On (A)
Back-EMF Constant (V/1000 rpm)
Back EMF Amplitude (V/ksteps/s)
Holding Torque, MIN (mNm)
Holding Torque, MIN (oz-in)
Holding Torque Typical (mNm)
Holding Torque Typical (oz-in)
Holding Torque, 1.5x nominal current (mNm)
Holding Torque, 1.5x nominal current (oz-in)
Detent Torque, Typical (mNm)
Detent Torque, Typical (oz-in)
Rated Current per Phase, 1 Phase ON{%|%}A 0.71 1.41 0.41 0.17
Detent Torque, Max (mNm)
Detent Torque, Max (oz-in)
Rotor Inertia (kgm²10^-7)
Rotor Inertia (oz-in-sec²10^-6)
Nominal Voltage (Volt)
Optimization (rpm)
No-Load Speed (rpm)
No-Load Current (mA)
Max continuous mechanical power (@ 25°C)
Max continuous Current (A)
Max Continuous Torque (mNm)
Max Continuous Torque (oz-in)
Terminal Resistance (W)
Output Power (W)
Stall Torque (oz-in)
Stall Torque (mNm)
Efficiency (%)
Speeds up to (rpm)
Torque up to (oz-in)
Torque up to (mNm)
Current up to (thermal limits)
Torque Constant (mNm/A)
Torque Constant (oz-in/A)
Motor Regulation R/k² (10³/Nms)
Motor regulation k/R½ (mNm/W)
Motor regulation k/R½ (oz-in/W)
Internal resistance - phase to phase (W)
Line to Line resistance at connectors (Ω)
Inductance - phase to phase (mH)
Friction Torque (onz-in)
Friction Torque (mNm)
Rotor Inductance (mH)
Mechanical Time Constant (ms)
Thermal Time Constant (C/W)
Absolute accuracy 2 ph. On, Full step mode (degree)
Ambient Temperature Range, Operating (°C)
Ambient Temperature Range, Operating (°F)
Rotor Operating Temperature Range (°C)
Rotor Operating Temperature Range (°F)
Max motor speed (rpm)
Ambient storage temperature range (°C) -20° to +70°
Ambient storage temperature range (°F) -4° to +158°
Ball bearings preload (N)
Axial static force without shaft support (N)
Max winding temperature (°C)
Max Winding Temperature (C)
Max Winding Temperature (°F)
Max winding temperature (F)
Hall Sensor Elecrical Phasing (degree)
Typical Housing Material
Continuous Stall Current (A)
Peak Torque for 1s (mNm)
Peak Torque for 1s (oz-in)
Peak Current (A)
Shaft Load Max Axial (lb)
Shaft Load Max Axial (N)
Shaft Load Max Radial (lb)
Shaft Load Max Radial (N)
Min. Holding Force (Unenergized) @ .0005" (0.0127 mm) / Step{%|%}N 50.00 50.00 50.00 50.00
Min. Holding Force (Unenergized) @ .0005" (0.0127 mm) / Step{%|%}oz 180.00 180.00 180.00 180.00
Min. Holding Force @ 0.001" (0.0254 mm) / Step (Un-energized){%|%}N 13.9 13.9 13.9 13.9
Min. Holding Force @ 0.001" (0.0254 mm) / Step (Un-energized){%|%}oz 50.0 50.0 50.0 50.0
Min. Holding Force @ 0.002" (0.0508 mm) / Step (Un-energized){%|%}N 5.5 5.5 5.5 5.5
Min. Holding Force @ 0.002" (0.0508 mm) / Step (Un-energized){%|%}oz 20.0 20.0 20.0 20.0
Min. Holding Force (Unenergized) @ 0.003" (0.0762 mm) / Step (Un-energized){%|%}N
Min. Holding Force (Unenergized) @ 0.003" (0.0762 mm) / Step (Un-energized){%|%}oz
Min. Holding Force @ 0.004" (0.1016 mm) / Step (Un-energized){%|%}N
Min. Holding Force @ 0.004" (0.1016 mm) / Step (Un-energized){%|%}oz
Min. Holding Force @ rated current @ .0005" (0.0127 mm) / Step{%|%}N 50.00 50.00 50.00 50.00
Min. Holding Force @ rated current @ .0005" (0.0127 mm) / Step{%|%}oz 180.00 180.00 180.00 180.00
Min. Holding Force @ rated current @ .001" (0.0254 mm) / Step{%|%}N 35.00 35.00 35.00 35.00
Min. Holding Force @ rated current @ .001" (0.0254 mm) / Step{%|%}oz 126.00 126.00 126.00 126.00
Min. Holding Force @ rated current @ .002" (0.058 mm) / Step{%|%}N 22.00 22.00 22.00 22.00
Min. Holding Force @ rated current @ .002" (0.058 mm) / Step{%|%}oz 79.00 79.00 79.00 79.00
Min. Holding Force @ rated current @ .003" (0.0762 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .003" (0.0762 mm) / Step{%|%}oz
Min. Holding Force @ rated current @ .004" (0.1016 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .004" (0.1016 mm) / Step{%|%}oz
Stroke Length, Typ{%|%}mm 20.0 20.0 20.0 20.0
Stroke Length, Typ{%|%}in 0.8 0.8 0.8 0.8
Steps per Revolution 48 48 48 48
Ambient temperature range, operating{%|%}°C -20° to +70° -20° to +70° -20° to +70° -20° to +70°
Ambient temperature range, operating{%|%}°F -4° to +158° -4° to +158° -4° to +158° -4° to +158°
Maximum Coil Temperature{%|%}°F 266 266 266 266
Maximum Coil Temperature{%|%}°C 130 130 130 130
Bearing Type Ball Bearing Ball Bearing Ball Bearing Ball Bearing
Insulation Resistance at 500 VDC{%|%}Mohms 20 20 20 20
Dielectric Withstanding Voltage{%|%}VAC 650 650 650 650
Number of lines available
Output signal
Supply Current - maxium (mA)
Supply Current - stand-by (μA)
Supply Current - typical (mA)
Supply Voltage (V)
Direction of rotation ( = / ≠)
Max. Recommended Input Speed (rpm)
Number of gear stages
Number of lines available
Thermal Resistance (C/W)
Natural Resonance Frequency @nominal current (Hz)
Electrical time constant (ms)
Angular Acceleration (nominal current)
Radial Shaft Play (µm)
Axial Shaft Play (µm)
Max Radial Shaft Load (oz)
Max Radial Shaft Load (N)
Max Axial Shaft Load (oz)
Max Axial Shaft Load (N)
Weight{%|%}g 35.0 35.0 35.0 35.0
Weight{%|%}oz 1.23 1.23 1.23 1.23
Leadwire
Type of encoder
Power rate, nominal current (kW/s)
Step Angle ±1 Step ±1 Step ±1 Step ±1 Step
Input Power (W)
Stepper Type Bipolar Bipolar Bipolar DLA