Electric actuator

linearstepperlead screw

Product overview
The PM stepper linear actuator in 20 mm frame is offered in External, Non‑captive and Kaptive configurations. Multiple lead‑screw leads, end‑machining options and stroke lengths are available to adapt the actuator to precision positioning applications.

Motor characteristics

• Frame size: 20 mm
• Polarity: Bi‑polar
• Available actuator types: External, Non‑captive, Kaptive
• Step angles: 7.5° and 15°
• Winding / voltage options: 5 V and 12 V
• Phase current (5 V / 12 V): 370 mA / 160 mA (applies to both 7.5° and 15°)
• Phase resistance:
  • 7.5°: 13.5 Ω (5 V), 74.5 Ω (12 V)
  • 15°: 13.5 Ω (5 V), 76 Ω (12 V)
• Phase inductance:
  • 7.5°: 6.5 mH (5 V), 36 mH (12 V)
  • 15°: 4 mH (5 V), 25 mH (12 V)
• Power consumption: 3.4 W
• Rotor inertia: 1.05 g·cm²
• Insulation class: B
• Insulation resistance: 100 MΩ
• Mass: 35 g

Available lead screw and travel per step
(Step angle / Screw lead (mm) / Screw lead (inch) / Travel per step (mm) / Travel per step (inch) / Lead code):
7.5° rows:

• 0.3 mm / 0.0118 in → 0.00625 mm / 0.00025 in — AF
• 0.6096 mm / 0.024 in → 0.0127 mm / 0.0005 in — AA
• 1.0 mm / 0.03937 in → 0.02083 mm / 0.00082 in — AB
• 1.2192 mm / 0.048 in → 0.0254 mm / 0.001 in — B
• 2.0 mm / 0.07874 in → 0.04167 mm / 0.00164 in — G
• 2.4384 mm / 0.096 in → 0.0508 mm / 0.002 in — J
• 4.0 mm / 0.15748 in → 0.0833 mm / 0.00328 in — M

15° rows:

• 0.3 mm / 0.0118 in → 0.0125 mm / 0.00049 in — AF
• 0.6096 mm / 0.024 in → 0.0254 mm / 0.001 in — AA
• 1.0 mm / 0.03937 in → 0.0417 mm / 0.00164 in — AB
• 1.2192 mm / 0.048 in → 0.0508 mm / 0.002 in — B
• 2.0 mm / 0.07874 in → 0.0833 mm / 0.00328 in — G
• 2.4384 mm / 0.096 in → 0.1016 mm / 0.004 in — J
• 4.0 mm / 0.15748 in → 0.1667 mm / 0.00656 in — M

Dimensional drawings
Available for External, Non‑captive and Kaptive types. Example stroke table (Stroke X / Front extension A / Total extension B / Body length C (Max)):

• Stroke 14 mm: A = 13.5 ±0.25 mm, B = 40.5 mm, C (Max) = 30.5 mm
• Stroke 18 mm: A = 17.5 ±0.25 mm, B = 48.5 mm, C (Max) = 34.5 mm
• Stroke 25 mm: A = 24.5 ±0.25 mm, B = 62.5 mm, C (Max) = 41.5 mm
• Stroke 31 mm: A = 30.5 ±0.25 mm, B = 74.5 mm, C (Max) = 47.5 mm

Speed‑thrust curves
Speed vs thrust characteristic curves are provided for the 20 mm PM actuator (graphs available in the product documentation and on the product page).

Options

• Screw end machining: custom end‑machining options to fit installation requirements
• Teflon coating: Teflon‑coated lead screws are available for greaseless screw/nut combinations; coating can extend life cycle and improve thrust generation versus conventional SUS lead screws. Available across all lead‑screw options and all PM actuator types.

Technical specifications

• Brand: DINGS
• Series / denomination: PM stepper linear actuator
• Frame size: 20 mm
• Polarity: Bi‑polar
• Actuator types: External, Non‑captive, Kaptive
• Step angles: 7.5°, 15°
• Winding options: 5 V and 12 V
• Phase current: 370 mA (5 V), 160 mA (12 V)
• Phase resistance: 13.5 Ω, 74.5 Ω (7.5°); 13.5 Ω, 76 Ω (15°)
• Phase inductance: 6.5 mH / 36 mH (7.5°); 4 mH / 25 mH (15°)
• Power consumption: 3.4 W
• Rotor inertia: 1.05 g·cm²
• Insulation class: B
• Insulation resistance: 100 MΩ
• Mass: 35 g
• Available lead codes: AF, AA, AB, B, G, J, M
• Available strokes (examples): 14, 18, 25, 31 mm
• Options: screw end machining, Teflon coated lead screws