Electric actuator 8E2 series

linearball screwstepper

Product overview
The Size 8 (20 mm) stepper-driven external ball screw linear actuator. Designed for compact positioning applications; various screw-end machining and encoder options are available.

Motor characteristics (specification)
Model No. | Rated Voltage [V] | Current [A] (RMS) | Resistance [Ω] | Inductance [mH] | Lead Wires | Motor Length L [mm]
8E2105 | 2.55 | 0.5 | 5.1 | 1.5 | 4 | 27.2
8E2205 | 4.4 | 0.5 | 8.8 | 2.7 | 4 | 38.1

Ball screw specifications
Ball screw type: 0401 | 0402
Ball size: Φ0.8 | Φ0.8
Number of threads: 1 | 1
Thread direction: Right
Shaft root diameter: Φ3.3
Number of circuits: 3.7×1 | 2.7×1
Shaft & nut material: SCM415H
Surface hardness: HRC58~62
Anti-rust treatment: Anti-rust oil
Grade: C7

Nut size / Performance
Nut size | A | B | C | D | H | W | X | Axial play (mm) | Dynamic load [N] | Static load [N]
BS0401 | 19 | 3 | 13 | 9 | 13 | 14 | 2.9 | ≤0.02 | 560 | 790
BS0402 | 23 | 4 | 19 | 11 | 15 | 17 | 3.4 | ≤0.02 | 420 | 570

Dimensional drawings
External actuator images and dimensional drawings provided for Size 8 external actuator (external view and dimension diagram available).

Speed–thrust curves
Single-stack and double-stack speed–thrust curves are available for the 20 mm unit. Test condition: Testing Voltage 24 Vdc; Driver Model DS-OLS2-FPD (bipolar chopper) at rated current (RMS). Motor thrust varies with voltage and driver; a 50% thrust margin is recommended for selection.

Options

• Screw end machining: multiple end machining options available.
• Encoder option EK1: various resolutions and single-ended or differential outputs.

Encoder (EK1) — available resolutions / outputs
Resolution (CPR): 100, 108, 120, 125, 128, 200, 250, 256, 300, 360, 400, 500, 1000, 512, 720, 800
Single-ended output mapping: 0–15
Differential output mapping: A–P

Power-off brake (Size 8)
Rated voltage: DC 24 V ±5%
Resistance: 55 Ω ±10%
Power: 9.6 W
Hold torque: >0.06 N·m
Insulation class: B
Insulation resistance: >100 MΩ (DC 500 V)
Dielectric strength: AC 1000 V for 1 s
Retraction time: 50 ms
Release time: 50 ms
Gyration gap: 1°
Emergency brake cycles: 200 cycles
Lifetime: 500,000 cycles
Noise level: <60 dB

Technical features / specifications

• Series: Size 8 (20 mm)
• Product type: External Stepper Ball Screw Linear Actuator
• Manufacturer / Brand: DINGS
• Motor examples: 8E2105, 8E2205 (see motor specs above)
• Ball screw types: 0401, 0402; Ball Φ0.8; single thread; right-hand; shaft root Φ3.3; grade C7
• Nut models: BS0401 (axial play ≤0.02 mm; dynamic 560 N / static 790 N), BS0402 (axial play ≤0.02 mm; dynamic 420 N / static 570 N)
• Materials: SCM415H (shaft & nut); surface hardness HRC58~62; anti-rust oil treatment
• Options: screw-end machining, EK1 encoder (multiple CPR and output types), power-off brake (24 V) with specified parameters
• Design aids: dimensional drawings and speed–thrust curves available for selection