LINEAR ACUTATORS > NEMA 8
Hybrid Stepper Motor
Linear Actuators
The NEMA 8 stepper motor linear actuator can be integrated into various applications to provide precise linear positioning while occupying less than 1 in² of mounting footprint and providing up to 10 lbsF (44.5N) of continuous thrust. Ball screw versions are also available.
The NEMA 8 stepper motor linear actuator features easy integration into your applications, a high level of precision, safer performance, and an economical cost. The NEMA 8 stepper motor linear actuator has four form factors available – electric cylinder, captive, non-captive, and an external linear version.
Let our world class applications engineering team help you determine whether the NEMA 8 stepper motor linear actuator or one of our other linear actuator solutions is best suited to meet your application’s needs.
NEMA 8 (20mm)
| Motor | Voltage (V) | Current (A) | Resistance (Ω) | Inductance (mH) | Weight (g) | Lead Wire No. | Motor Length (mm) |
|---|---|---|---|---|---|---|---|
| 8-2105 | 2.5 | 0.5 | 5.1 | 1.5 | 51 | 4 | 27.2 |
| 8-2205 | 4.4 | 0.5 | 8.8 | 2.7 | 74 | 4 | 38.1 |
| Screw Diameter (inch) | Screw Diameter (mm) | Lead (inch) | Lead (mm) | Lead Code | Travel Per Step (mm) |
|---|---|---|---|---|---|
| 0.138 | 3.5 | 0.0118 | 0.3000 | AF | 0.0015 |
| 0.138 | 3.5 | 0.024 | 0.6096 | AA | 0.003 |
| 0.138 | 3.5 | 0.0394 | 1.00 | AB | 0.005 |
| 0.138 | 3.5 | 0.048 | 1.2192 | B | 0.0061 |
| 0.138 | 3.5 | 0.079 | 2.00 | G | 0.01 |
| 0.138 | 3.5 | 0.158 | 4.00 | M | 0.02 |
| 0.138 | 3.5 | 0.315 | 8.00 | T | 0.04 |
NEMA 8 External Linear Actuator
NEMA 8 Non-Captive Linear Actuator
NEMA 8 - Captive Linear Actuator
NEMA 8 - Electric Cylinder
All speed / thrust curves below are generated using 8:1 microstepping setting on driver
TEST CONDITION
Testing Voltage: 24Vdc, Driver Model: DS-OLS2-FPD bipolar, chopper driver at rated current (rms). Motor's thrust will vary with different voltage and driver. 50% thrust margin is recommended.
TEST CONDITION
Testing Voltage: 24Vdc, Driver Model: DS-OLS2-FPD bipolar, chopper driver at rated current (rms). Motor's thrust will vary with different voltage and driver. 50% thrust margin is recommended.
External Linear
Non-Captive Linear
Backdrive Force for NEMA 8
| "B" 1.2192mm | "G" 2mm | "M" 4mm | "T" 8mm | |
|---|---|---|---|---|
| Single Stack | 5kg | 0.8kg | 0.2kg | 0.1kg |
| Double Stack | 7kg | 1kg | 0.4kg | 0.1kg |
This chart provides an overview of the force required to backdrive stepper linear actuators, a critical parameter for determining their suitability in various applications. Backdriving occurs when an external force causes the lead screw to rotate, moving the actuator without motor input. Understanding the backdriving force is essential for ensuring the stability and precision of motion control systems.
The data is categorized by NEMA motor size, motor stack type (single or double), and lead screw lead, offering a comprehensive comparison for different configurations. Whether you're selecting components for a new design or evaluating the performance of an existing system, this chart serves as a valuable reference for making informed decisions.
Part Number Nomenclature
Please choose the right part number by following the guidelines below.
| Part Number Component | Description | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Motor Size |
|
||||||||||||||||||
| 2. Linear Actuator Type |
E = External Linear Actuator N = Non-Captive Linear Actuator C = Electric Cylinder (Captive) Linear Actuator K = Captive Linear Actuator |
||||||||||||||||||
| 3. Motor Step Angle |
2 = 2 Phase with 1.8° 4 = 2 Phase with 0.9° 5 = 5 Phase with 0.72° |
||||||||||||||||||
| 4. Motor Length |
1 = Single Stack 2 = Double Stack 3 = Triple Stack |
||||||||||||||||||
| 5. Rated Current / Phase | XX = X.X [A]/Phase | ||||||||||||||||||
| 6. Lead Screw Code | Please refer to lead screw code selection table. | ||||||||||||||||||
| 7. Number of Lead Wires | 4 = 4 Flying Leads 6 = 6 Flying Leads 8 = 8 Flying Leads |
||||||||||||||||||
| 8. Lead Screw Length / Stroke | XXX = XXX mm Lead Screw Length [For External Linear/Non-Captive Linear] XXX = X.XX inch Stroke [For Electric Cylinder Captive Linear] For Electric Cylinder Captive Linear, please see available stroke information |
||||||||||||||||||
| 9. Lead Screw Surface Treatment | T = Teflon Coating S = Standard Grease [Note]: - Screw lead <0.6mm: standard grease - Screw lead >0.6mm: standard grease or Teflon coating |
||||||||||||||||||
| 10. End Machining | M = Metric U = UNC S = Smooth C = Customize (Provide customization requirements to DINGS') N = None |
||||||||||||||||||
| 11. Nut Style | S = Standard Flange Nut (For External Stepper Lead Screw Linear Actuator) A = Anti-Backlash Nut (For External/Non-Captive Stepper Lead Screw Linear Actuator) |
||||||||||||||||||
| 12. Option | EKX = Encoder (X = Encoder Resolution) P = Manual Knob B = Brake X = Rear Shaft R = Encoder Ready [Hole and Shaft] – Provide encoder ready requirements to DINGS’ C = Customize [Provide customization requirements to DINGS’] N = No processing at the rear end |
||||||||||||||||||
| 13. Customer Sequence Number | Leave blank unless specified. | ||||||||||||||||||
| Example |
|