Description

Nema34 Non-Captive Linear Stepper Motor

The Nema34 non-captive linear stepper motor is designed for industrial automation systems that require controlled linear movement, substantial thrust, and flexible travel distances. Its non-captive lead screw structure supports extended linear travel without relying on a fixed internal screw stroke.

Featuring a large rotor structure, high-performance magnetic materials, and a rigid lead screw, this motor is suitable for demanding motion control applications. Multiple lead configurations are available to accommodate different speed and travel requirements.

OEM and ODM customization is supported for equipment manufacturers seeking linear motion solutions tailored to their mechanical designs.

Key Features and Benefits

• Extended Linear Travel: The non-captive lead screw design accommodates long-travel applications, with travel determined by the overall mechanical system.
• High Thrust Capability: The Nema34 motor platform is designed for applications requiring substantial linear force, subject to motor and lead screw specifications.
• Flexible Motion Configuration: Multiple lead options help balance linear speed and thrust requirements.
• Microstepping Compatibility: Supported microstepping drives enable finer command resolution for controlled positioning.
• Stable Mechanical Performance: A rigid lead screw and quality bearings support smooth motion under appropriate operating conditions.
• OEM and ODM Support: Custom configurations can be discussed according to equipment requirements and installation constraints.

Performance and Motion Control

High-Thrust Linear Motion

The large rotor structure and optimized magnetic circuit are designed to support strong torque output and efficient motor operation. When paired with a suitable lead screw and drive system, the motor can convert rotary motion into controlled linear displacement.

Actual thrust depends on factors such as motor torque, screw lead, drive settings, speed, and mechanical load. Selecting the right configuration helps align motion performance with the requirements of heavy-duty automation equipment.

Flexible Lead Screw Configuration

Different lead screw configurations support different linear travel and speed requirements. A smaller screw lead generally provides greater theoretical linear force for a given torque, while a larger lead can provide greater travel per revolution.

The final selection should account for required thrust, travel speed, positioning resolution, and the mechanical system’s load conditions.

Microstepping and Positioning Control

The motor supports microstepping when used with a compatible driver. Microstepping divides each full motor step into smaller commanded increments, allowing smoother motion and finer command resolution.

Actual positioning accuracy and repeatability depend on the motor, driver, mechanical transmission, load, and control parameters. Application testing is recommended when precise positioning is critical.

Manufacturing Quality and Reliability

Consistent motor performance depends on component quality, manufacturing control, and verification testing. The rotor uses high-performance rare-earth magnetic materials, while precision CNC machining is used for specified stator-related manufacturing processes.

Critical dimensions are inspected to support consistent assembly and production quality. Load performance and continuous-operation verification are also part of the stated testing process.

The lead screw and bearing system contribute to mechanical stability and service life. Their suitability should be evaluated against the expected load, operating speed, duty cycle, lubrication requirements, and environmental conditions.

For equipment manufacturers, these considerations help establish a suitable motor configuration for long-term industrial operation.

Typical Applications

The Nema34 non-captive linear stepper motor can be considered for linear positioning and motion control in:

• Heavy-duty industrial automation lines
• Semiconductor manufacturing equipment
• Smart warehousing and material handling systems
• Large-scale packaging machinery
• Industrial inspection and positioning platforms
• CNC processing equipment
• New energy production systems
• Automated conveying equipment

Final suitability depends on the required thrust, travel distance, speed, mounting arrangement, and operating environment.

General Specifications

• Product Name: Nema34 Non-Captive Linear Stepper Motor
• Motor Type: 2-Phase Hybrid Linear Stepper Motor
• Configuration: Non-Captive Open Lead Screw Drive Design
• Frame Size: 86 × 86 mm
• Motor Length: 98 mm / 114 mm / 150 mm optional
• Step Angle: 1.8° (200 steps per revolution)
• Step Accuracy: ±5%
• Lead Screw Diameter: Φ12 mm or Φ16 mm optional
• Lead Screw Material: Hardened High-Strength Alloy Steel
• Lead Options: 4 mm / 8 mm / 12 mm / 20 mm
• Maximum Theoretical Travel: Unlimited, depending on external screw length

Electrical Characteristics

• Rated Current: 4.0~6.8 A/phase
• Phase Resistance: 0.3~1.2 Ω
• Phase Inductance: 3.5~12.0 mH
• Recommended Supply Voltage: 48~100 VDC
• Insulation Resistance: ≥100 MΩ at 500V DC
• Dielectric Strength: 1000V AC for 1 minute
• Insulation Class: Class F (155°C)

Motion Performance

• Holding Torque: 4.5~12 N·m
• Maximum Linear Thrust: 800~3000 N
• Repeatability Accuracy: ±0.008 mm
• Axial Backlash: ≤0.03 mm
• Maximum No-Load Speed: 1500 mm/s
• Noise Level: ≤60 dB
• Maximum Axial Load Capacity: 3500 N

Environmental Specifications

• Operating Temperature: -20°C to +55°C
• Storage Temperature: -40°C to +85°C
• Protection Rating: IP54 (Optional IP65)
• Cooling Method: Natural Cooling or Forced-Air Cooling

Optional Features

• Anti-Rotation Mechanism
• Incremental Encoder
• Absolute Encoder
• Electromagnetic Brake
• Custom Lead Screw Length
• Dual Shaft Configuration