Electric actuator

linearstepperlead screw

Overview
The PM 25 mm stepper linear actuator is a compact, modular linear solution offered in External, Non‑Captive and Kaptive configurations. Multiple lead‑screw diameters, lead options and screw end machining choices enable adaptation to a wide range of industrial motion applications.

Actuator types

• External
• Non‑Captive
• Kaptive

Motor characteristics

• Frame: 25 mm
• Polarity: Bi‑Polar
• Step angles: 7.5° and 15°
• Winding voltages: 5 V, 12 V
• Example phase currents: 370 mA (5 V), 160 mA (12 V)
• Example phase resistances: 13.5 Ω (5 V), 70 Ω (12 V)
• Phase inductance examples: 12.5 mH / 65 mH (7.5° variants); 9.5 mH / 47 mH (15° variants)
• Power consumption: 3.85 W
• Rotor inertia: 1.08 g·cm²
• Insulation class: B
• Insulation resistance: 100 MΩ
• Mass: 50 g

Available lead screw and travel per step
Format: Step angle — Screw dia. (mm) — Screw lead (mm / inch) — Travel per step (mm / inch) — Screw lead code

7.5°

• Φ3.5 — 0.3 mm / 0.0118 in — 0.00625 mm / 0.00025 in — Code: AF
• Φ3.5 — 0.6096 mm / 0.024 in — 0.0127 mm / 0.0005 in — Code: AA
• Φ3.5 — 1.0 mm / 0.03937 in — 0.02083 mm / 0.00082 in — Code: AB
• Φ3.5 — 1.2192 mm / 0.048 in — 0.0254 mm / 0.001 in — Code: B
• Φ3.5 — 2.0 mm / 0.07874 in — 0.04167 mm / 0.00164 in — Code: G
• Φ3.5 — 2.4384 mm / 0.096 in — 0.0508 mm / 0.002 in — Code: J
• Φ3.5 — 4.0 mm / 0.15748 in — 0.0833 mm / 0.00328 in — Code: M
• Φ4.77 — 0.635 mm / 0.025 in — 0.0132 mm / 0.00052 in — Code: A
• Φ4.77 — 1.27 mm / 0.05 in — 0.0265 mm / 0.00104 in — Code: D
• Φ4.77 — 2.54 mm / 0.1 in — 0.0529 mm / 0.00208 in — Code: K

15°

• Φ3.5 — 0.3 mm / 0.0118 in — 0.0125 mm / 0.00049 in — Code: AF
• Φ3.5 — 0.6096 mm / 0.024 in — 0.0254 mm / 0.001 in — Code: AA
• Φ3.5 — 1.0 mm / 0.03937 in — 0.0417 mm / 0.00164 in — Code: AB
• Φ3.5 — 1.2192 mm / 0.048 in — 0.0508 mm / 0.002 in — Code: B
• Φ3.5 — 2.0 mm / 0.07874 in — 0.0833 mm / 0.00328 in — Code: G
• Φ3.5 — 2.4384 mm / 0.096 in — 0.1016 mm / 0.004 in — Code: J
• Φ3.5 — 4.0 mm / 0.15748 in — 0.1667 mm / 0.00656 in — Code: M
• Φ4.77 — 0.635 mm / 0.025 in — 0.0265 mm / 0.00104 in — Code: A
• Φ4.77 — 1.27 mm / 0.05 in — 0.0529 mm / 0.00208 in — Code: D
• Φ4.77 — 2.54 mm / 0.1 in — 0.1058 mm / 0.00417 in — Code: K

Dimensional data (External / Non‑Captive / Kaptive)

• Stroke X = 13 mm — Front extension A = 10.5 ±0.25 mm — Total extension B = 36.5 mm — Body length C (Max) = 27.5 mm
• Stroke X = 18 mm — Front extension A = 15.5 ±0.25 mm — Total extension B = 46.5 mm — Body length C (Max) = 32.5 mm
• Stroke X = 25 mm — Front extension A = 22.5 ±0.25 mm — Total extension B = 60.5 mm — Body length C (Max) = 39.5 mm
• Stroke X = 31 mm — Front extension A = 28.5 ±0.25 mm — Total extension B = 72.5 mm — Body length C (Max) = 45.5 mm

Speed / Thrust Performance
Speed‑thrust curves are provided for the 25 mm PM actuator in product materials. Refer to performance graphs to select the appropriate lead and step angle for required speed and thrust characteristics.

Options

• Screw end machining: multiple end‑machining variants available to suit custom fittings.
• Teflon (PTFE) coating: optional Teflon coating for greaseless screw and nut combinations; improves life cycle and thrust performance versus conventional SUS lead screws. Available across all lead screw options and actuator types (External, Non‑Captive, Kaptive).

Specifications

• Brand: DINGS
• Series: PM (25 mm)
• Actuator types: External, Non‑Captive, Kaptive
• Step angles: 7.5°, 15°
• Winding voltages: 5 V, 12 V
• Phase current (examples): 370 mA (5 V), 160 mA (12 V)
• Phase resistance (examples): 13.5 Ω (5 V), 70 Ω (12 V)
• Phase inductance (examples): 12.5 mH / 65 mH (7.5°) and 9.5 mH / 47 mH (15°)
• Power consumption: 3.85 W
• Rotor inertia: 1.08 g·cm²
• Insulation class: B
• Insulation resistance: 100 MΩ
• Mass: 50 g
• Lead screw options: multiple diameters, leads and coded lead options (codes: AF, AA, AB, B, G, J, M, A, D, K)
• Stroke/dimension options: X = 13 / 18 / 25 / 31 mm with corresponding A / B / C values