Electric actuator

linearstepperlead screw

Product overview
The size 25 mm PM Stepper Linear Actuator is available in External, Non‑Captive and Kaptive configurations. Various lead‑screw diameters, lead options, screw end machining and length customization are available to adapt the actuator to specific industrial applications.

Motor characteristics
25 mm frame
Polarity: Bi‑Polar
Linear actuator types: External, Non‑Captive, Kaptive
Step angle: 7.5° / 15°
Winding voltages: 5 V, 12 V
Winding (7.5°): 5V, 12V; Winding (15°): 5V, 12V
Phase current (7.5°): 370 mA (5 V), 160 mA (12 V); Phase current (15°): 370 mA (5 V), 160 mA (12 V)
Phase resistance (7.5°): 13.5 Ω (5 V), 70 Ω (12 V); Phase resistance (15°): 13.5 Ω (5 V), 70 Ω (12 V)
Phase inductance (7.5°): 12.5 mH (5 V), 65 mH (12 V); Phase inductance (15°): 9.5 mH (5 V), 47 mH (12 V)
Power consumption: 3.85 W
Rotor inertia: 1.08 g·cm²
Insulation class: B
Insulation resistance: 100 MΩ
Mass: 50 g

Available lead screw options and travel per step
Step angle: 7.5° — Screw dia. Φ3.5 mm

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

• Screw dia. Φ4.77 mm — Lead 0.635 mm (0.025 in) → Travel per step 0.0132 mm (0.00052 in) → Code A
• Φ4.77 mm — Lead 1.27 mm (0.05 in) → Travel per step 0.0265 mm (0.00104 in) → Code D
• Φ4.77 mm — Lead 2.54 mm (0.1 in) → Travel per step 0.0529 mm (0.00208 in) → Code K

Step angle: 15°
Φ3.5 mm leads:

• Lead 0.3 mm → Travel per step 0.0125 mm (0.00049 in) → Code AF
• Lead 0.6096 mm → Travel per step 0.0254 mm (0.001 in) → Code AA
• Lead 1.0 mm → Travel per step 0.0417 mm (0.00164 in) → Code AB
• Lead 1.2192 mm → Travel per step 0.0508 mm (0.002 in) → Code B
• Lead 2.0 mm → Travel per step 0.0833 mm (0.00328 in) → Code G
• Lead 2.4384 mm → Travel per step 0.1016 mm (0.004 in) → Code J
• Lead 4.0 mm → Travel per step 0.1667 mm (0.00656 in) → Code M

• Φ4.77 mm — Lead 0.635 mm → Travel per step 0.0265 mm (0.00104 in) → Code A
• Φ4.77 mm — Lead 1.27 mm → Travel per step 0.0529 mm (0.00208 in) → Code D
• Φ4.77 mm — Lead 2.54 mm → Travel per step 0.1058 mm (0.00417 in) → Code K

Dimensional drawings
Available types: External / Non‑Captive / Kaptive (illustrated drawings available for each type).
Stroke X (mm) | Front extension A | Total extension B | Body length C (Max)

• 13 | 10.5±0.25 | 36.5 | 27.5
• 18 | 15.5±0.25 | 46.5 | 32.5
• 25 | 22.5±0.25 | 60.5 | 39.5
• 31 | 28.5±0.25 | 72.5 | 45.5

Speed‑thrust curves
Speed/thrust characteristic graphs are provided for the 25 mm PM actuator to support selection of lead and step angle based on required speed and thrust.

Options

• Screw end machining: Various screw end machining options available for mechanical integration.
• Teflon (PTFE) coating: Teflon coated lead screws are available for greaseless screw/nut combinations. PTFE coating extends life cycle and improves thrust generation compared with conventional SUS lead screws. Coating is available across all lead screw options and for External, Non‑Captive and Kaptive types.

Specifications / technical data

• Brand: DINGS
• Series / Model family: PM Stepper Linear Actuator
• Frame size: 25 mm
• Available actuator types: External, Non‑Captive, Kaptive
• Step angles available: 7.5°, 15°
• Winding voltages: 5 V, 12 V
• Phase current options: 370 mA / 160 mA (depending on winding)
• Phase resistance options: 13.5 Ω / 70 Ω
• Phase inductance options: 9.5–65 mH (depending on step angle and winding)
• Power consumption: 3.85 W
• Rotor inertia: 1.08 g·cm²
• Insulation class: B; Insulation resistance: 100 MΩ
• Mass: 50 g
• Available screw leads and travel‑per‑step codes: AF, AA, AB, B, G, J, M, A, D, K
• Available strokes (examples shown): 13, 18, 25, 31 mm
• Options: Screw end machining, Teflon coated lead screws