Precision Motion Product

Captive Hybrid ACME Lead Screw Stepper Motor

Precision captive hybrid ACME lead screw stepper motor featuring a built-in anti-rotation mechanism. Designed for short-stroke linear motion in medical diagnostics, valve automation, and robotics. Our captive hybrid ACME lead screw stepper motor features an...

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Technical Information

Product Details

Precision captive hybrid ACME lead screw stepper motor featuring a built-in anti-rotation mechanism. Designed for short-stroke linear motion in medical diagnostics, valve automation, and robotics.

Our captive hybrid ACME lead screw stepper motor features an internal anti-rotation mechanism that prevents the lead screw from spinning. As the motor turns, the ACME lead screw extends and retracts directly from the front faceplate without requiring external anti-rotation guides or linear rails.

This self-contained captive linear actuator provides a plug-and-play solution for short-stroke precision positioning. Built with high-torque hybrid stepper motor technology and precision-ground ACME threads, it guarantees high axial rigidity, maximum thrust force, and long operational service life.

Key Features & Advantages

Built-in Anti-Rotation Mechanism: The screw moves in a purely linear direction without rotating, saving space and eliminating external guide rails.
High Axial Thrust & Rigidity: Optimized internal nut and screw geometry handle heavy push and pull loads.
Self-Locking Capability: Trapezoidal ACME thread profile prevents back-driving under static loads when power is disconnected.
Modular NEMA Sizes: Available across NEMA 8, 11, 14, 17, and 23 frame sizes to suit diverse force requirements.

Technical Specifications

Feature / Parameter	Standard Specification
Frame Sizes	NEMA 8 (20mm), NEMA 11 (28mm), NEMA 14 (35mm), NEMA 17 (42mm), NEMA 23 (57mm)
Design Type	Captive (Built-in Anti-Rotation Shaft)
Screw Profile	Precision ACME Thread
Step Angle	1.8° / 0.9°
Stroke Length Options	12.7mm (0.5 in), 19.1mm (0.75 in), 25.4mm (1.0 in), 38.1mm (1.5 in), 50.8mm (2.0 in)
Positional Accuracy	± 0.005 mm
Max Thrust Force	Up to 1100 N (NEMA 23 variant)
Insulation Class	Class B (130°C) / Class F (155°C) optional
IP Rating	IP40 Standard

Typical Applications

Automated Medical Diagnostic Instruments & Blood Analyzers
Electronic Valve Control & Precision Fluid Dispensing
Compact XY/XYZ Precision Positioning Stages

Engineering resources

Parameters, Drawings & Performance Data

Use order-specific technical documents for final selection. Published information should be checked against the required operating conditions and mechanical interface.

Technical parameters, drawings and performance data are confirmed against the selected model and operating conditions.

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Information Needed for Model Selection

Application and motion type
Load or required thrust / torque
Speed, travel and acceleration
Accuracy and repeatability target
Duty cycle and operating environment
Installation space and interface drawing
Controller, drive and feedback requirements
Quantity, destination and required documents

Verified series range

Product Family Overview

The values below describe the available family range from Xinding's supplied technical files. Confirm the exact model parameters and drawing before ordering.

Family size range14–86 mm

Step angle1.8°

ConfigurationsCaptive / External / Non-captive

Lead wires4

Available sizes depend on configuration. The supplied range includes 14, 20, 28, 35, 42, 57, 60 and 86 mm products. Screw length and screw-end machining can be specified for applicable models.

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