SJA Series Screw Jack, Worm Gear Linear Actuator for Industrial Automation

Name: SJA Series Screw Jack, Worm Gear Linear Actuator for Industrial Automation
Brand: GLOBALMACHEX
Availability: InStock
Rating: 5 (1 reviews)

The SJA series screw jack converts rotary motion into linear lifting/pushing, featuring strong self-locking, high precision and compact structure. Widely used in industrial automation, metallurgy, stage, medical and other scenarios, it supports 0.5-100 ton loads, multiple drive modes and synchronous linkage to meet diverse industrial drive needs.

$1.00 - 500.00

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Dezhou Darui Machinery Equipment Co., Ltd.

Main Products: Screw Lift, Ball Screw Lift, Electric Push Rod

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Year Established Established in 2017

Main Products Screw Lift, Ball Screw Lift, Electric Push Rod

Employees Less than 50 People

Factory Area 1,000-5,000 m²

Annual Revenue US$1 Million - US$5 Million

Main Markets Southeast Asia / South Asia / Middle East & North Africa / Africa

Details

Specifications

Product Overview

An electric linear actuator is an electromechanical device that converts the rotary motion of a motor into linear reciprocating motion. It consists of a motor, reduction gears, lead screw/ball screw, nut, push rod, and limit switches, enabling various actions such as pushing, pulling, lifting, tilting, and adjusting. Widely used as a cleaner, more precise, and energy-saving alternative to pneumatic and hydraulic cylinders.

2. Structure & Working Principle

Power Unit: The drive motor provides rotational power.
Transmission Mechanism: Reduction gears reduce speed and increase torque.
Actuating Mechanism: Lead screw/ball screw and nut convert rotary motion into linear motion, driving the push rod.
Safety Protection: Built-in limit switches prevent over-travel damage, ensuring stable operation.

3. Key Advantages

Clean & Eco-Friendly: No hydraulic oil or air supply required, eliminating leaks and pollution, ideal for food, medical, and cleanroom environments.
Precise Control: Enables accurate position and speed adjustment via motor control, with high repeat positioning accuracy.
Energy Efficient: High operating efficiency with zero standby power consumption, more energy-saving than traditional cylinders.
Flexible Installation: Compact structure allows flexible layout, suitable for space-constrained applications.
Low Maintenance: No complex hydraulic/pneumatic piping; maintenance is limited to regular lubrication checks.

4. Typical Applications

Industrial Automation: Equipment pushing/pulling, lifting platforms, station adjustment, automated production lines
Medical Equipment: Hospital beds, rehabilitation devices, operating table adjustment
Smart Home: Electric sofas, standing desks, smart windows/doors
Automotive Industry: Power tailgates, seat adjustment, equipment compartment door control
Other Scenarios: Stage equipment, storage racks, gardening equipment, livestock machinery

Product Series

SJA Series Screw Jacks

Core Principle

Motion Type

3 Types: 1. SJA-I (Type S): Screw lifting, nut fixed (most common) 2. SJA-II (Type R): Screw rotating, nut lifting (short stroke, high rigidity) 3. SJA-III (Anti-rotation): Screw non-rotating, pure lifting (high precision

Drive Mode

Electric (Motor) / Manual (Handwheel)

Transmission Pair

Trapezoidal Screw (Standard, self-locking) / Ball Screw (Optional, high-efficiency)

Housing Material

Ductile Iron, high strength, good heat dissipation

Standard Precision

±0.1mm

Backlash Precision

±0.04mm

Rated Load Range

0.5 - 100 tons

Stroke Range

Standard ≤6.5m, customizable extra-long stroke

Max Linear Speed

≤75mm/s

Input Speed

≤1500rpm

Efficiency

Trapezoidal Screw: 25%-40%; Ball Screw: 90%+

Duty Cycle

30% within 10 minutes (derating required for continuous operation)

20℃ ~ 100℃

Mounting Style

Horizontal / Vertical / Flange Mount

Combination Form

Synchronous operation of 2/4/8 units, compatible with steering gears and reducers