Jyoti Hydraulic is a recognized manufacturer of precision-engineered hydraulic and mechanical systems, serving OEMs, EPC contractors, and industrial operators across India and global markets. With decades of hands-on manufacturing experience, Jyoti Hydraulic designs heavy-duty mechanical lifting solutions where reliability, accuracy, and long service life are non-negotiable.

Among these solutions, the Worm Gear Screw Jack remains a cornerstone product for industries that demand controlled linear motion under high load conditions. When engineered strictly in accordance with AGMA gear standards, this system delivers predictable performance, enhanced safety, and superior gearbox durability—making it suitable for continuous industrial duty and mission-critical applications.

What is an AGMA-designed worm gear screw jack gearbox?
It is a mechanical lifting and positioning system that uses an AGMA-compliant worm and worm wheel to convert rotary input into precise linear movement, ensuring high load capacity, controlled speed, minimal wear, and long-term operational reliability in industrial environments.

What Is a Worm Gear Screw Jack Gearbox?

A worm gear screw jack gearbox is a compact mechanical actuator designed to lift, lower, push, pull, or position heavy loads using rotational input. The gearbox reduces speed while multiplying torque, driving a precision-machined power screw that converts rotary motion into linear displacement.

A worm gear screw jack is a mechanical device that transforms rotary motion into linear movement with high load control, commonly used for lifting and positioning heavy industrial structures.

Why AGMA Gear Standards Are Critical in Screw Jack Design

The American Gear Manufacturers Association (AGMA) establishes globally accepted guidelines for gear geometry, load ratings, materials, heat treatment, surface finish, and inspection methods. Designing screw jack gearboxes as per AGMA standards ensures:

  • Accurate tooth profile and contact pattern

  • Reduced friction and heat generation

  • Uniform load distribution across gear teeth

  • Predictable efficiency and torque capacity

  • Extended service life under cyclic and shock loads

For B2B buyers, AGMA compliance reduces operational risk, improves equipment uptime, and supports global acceptance in EPC and export projects.

In-Depth Construction & Engineering Design

Jyoti Hydraulic screw jack gearboxes are engineered with a deep focus on mechanical integrity and long-term performance:

Gearbox Assembly

  • Hardened alloy steel worm shaft for high torque transmission

  • Precision-machined phosphor bronze worm wheel for excellent wear resistance

  • Optimized lead angle to balance efficiency and self-locking

  • Rigid housing to maintain shaft alignment under full load

Power Screw Design

  • Trapezoidal / ACME thread profiles for smooth load transfer

  • High axial strength with low backlash

  • Options for translating screw or rotating screw configurations

Bearing & Sealing System

  • Heavy-duty thrust bearings for axial load absorption

  • Anti-friction radial bearings for smooth rotation

  • Industrial-grade oil seals to prevent lubricant leakage

How Does a Worm Gear Screw Jack Work? (Step-by-Step)

  1. Input Motion Applied – Power is supplied via hand wheel, electric motor, or geared motor.

  2. Worm Shaft Rotation – The worm rotates inside the gearbox housing.

  3. Torque Amplification – The worm wheel reduces speed and multiplies torque.

  4. Screw Engagement – The worm wheel drives the lifting screw.

  5. Linear Movement Generation – The screw moves upward or downward based on rotation direction.

  6. Load Holding – Due to gear geometry, reverse motion is restricted, enhancing safety.

This controlled mechanism allows synchronized lifting when multiple jacks are connected through shafts or couplings.

Manufacturing & Quality Standards Followed

Jyoti Hydraulic integrates multiple international and national standards into its design and production process:

  • AGMA – Gear rating, geometry, and durability

  • ISO 9001:2015 – Quality management system

  • DIN – Mechanical compatibility and tolerances

  • BIS (IS) – Indian industrial compliance

These standards ensure interchangeability, repeatability, and long-term performance.

Technical Specifications & Performance Factors

Typical ranges offered include:

  • Load Capacity: 0.5 ton to 100 ton

  • Gear Ratios: 5:1 to 70:1

  • Input Options: Manual, electric motor, geared motor

  • Mounting Styles: Upright, inverted, traveling nut

  • Duty Cycle: Intermittent to continuous (application-specific)

Performance is influenced by load magnitude, duty cycle, lubrication quality, ambient temperature, and installation accuracy.

Industrial Applications & Use Cases

These screw jack gearboxes are extensively used in:

  • Steel and rolling mill equipment

  • Cement plant gate and damper systems

  • Power plant maintenance platforms

  • Conveyor belt tensioning systems

  • Automation and robotic positioning units

  • Heavy fabrication and assembly fixtures

Their ability to maintain position without external braking makes them ideal for safety-critical operations.

Advantages & Key Features (Buyer-Focused)

  • High mechanical advantage and torque capacity

  • Accurate and repeatable positioning

  • Self-locking for enhanced operational safety

  • Low maintenance and long service intervals

  • Compact footprint with flexible mounting options

  • Custom design support for OEM and EPC projects

Comparison: Screw Jack vs Hydraulic Lifting System

Criteria Screw Jack System Hydraulic System
Position Accuracy Very high Moderate
Load Holding Self-locking Valve dependent
Maintenance Low Higher
Leakage Risk None Possible
Long Idle Holding Excellent Limited

This comparison helps decision-makers choose the right technology based on application needs.

Quality Control, Testing & Compliance

Every unit undergoes a structured inspection and testing process:

  • Raw material verification

  • Gear tooth contact and backlash testing

  • No-load and full-load performance testing

  • Dimensional accuracy inspection

  • Final functional validation before dispatch

Why Choose Jyoti Hydraulic?

  • Decades of industrial manufacturing expertise

  • In-house gear design aligned with AGMA standards

  • Custom-engineered solutions for complex applications

  • Strong domestic and export project portfolio

  • Reliable after-sales support and technical guidance

Frequently Asked Questions

What industries commonly use screw jack gearboxes?
Steel, cement, power, automation, and heavy engineering industries.

Are these systems suitable for synchronized lifting?
Yes, multiple jacks can be synchronized using shafts or gearboxes.

Do screw jacks require frequent maintenance?
No, periodic lubrication and inspection are usually sufficient.

Can they operate continuously?
Yes, when designed correctly for load and duty cycle.

Are customized designs available?
Yes, capacity, mounting, and configuration can be customized.

Is self-locking always guaranteed?
Self-locking depends on gear ratio and lead angle.

Can these replace hydraulic cylinders?
In many positioning applications, yes—especially where precision is critical.

Conclusion

An AGMA-designed screw jack gearbox is a proven solution for industries that require precision, safety, and long-term mechanical reliability. With strong engineering fundamentals, strict quality control, and application-specific customization, Jyoti Hydraulic delivers lifting solutions that perform consistently under demanding conditions.

Contact Jyoti Hydraulic today to discuss your application requirements and get a technically optimized screw jack solution engineered for your industry.