EP Series High Precision Worm Gear Units

1. Ultra-Low, Adjustable Backlash

Using a patented dual lead worm shaft design, rotational backlash can be set to less than 1 arc minute (P0 grade) or between 2 and 4 arc minutes (P1 grade). Critically, this backlash can be re-adjusted after extended use without disassembling the unit. The worm shaft's axial position is shifted to compensate for normal wear, restoring original precision at any point in the unit's service life. This makes the EP Series High Precision Worm Gear Units an outstanding long-term investment for indexing tables, servo-driven conveyors, and precision CNC applications where accuracy is non-negotiable.

2. Optimized Tooth Contact & Wear Resistance

Advanced gear grinding technology and precision assembly ensure the worm and worm wheel mesh at the correct contact pattern, minimizing tooth surface stress. The worm wheel is manufactured from a specially developed bronze alloy that combines high mechanical strength with outstanding resistance to adhesive wear. Combined with the generous tooth surface contact ratio inherent in worm drive geometry, the worm wheel maintains its locked backlash setting for far longer than standard grade reducers—directly reducing maintenance frequency and unplanned downtime in production environments.

3. High-Stiffness Bearing Configuration

Both the worm shaft and the output shaft are supported by pre-tensioned taper roller bearings. For the worm input shaft, two taper roller bearings are installed at one end in a back-to-back (DB) arrangement, providing outstanding resistance to thermal elongation of the shaft and ensuring consistent bearing stiffness throughout the operating temperature range. This configuration also eliminates the positional drift that can affect single-bearing arrangements in servo applications, directly improving the dynamic response of the entire servo axis.

4. Maintenance-Free, Fully Sealed Design

The reducer is filled at the factory with a high-performance full-synthetic lubricant and is fully sealed for life. There is no oil drain plug for periodic changes, no lubrication schedule for the operator to manage, and no risk of lubricant contamination from the environment. For production engineers operating facilities in tropical climates—common across Colombia and the wider Latin American region—this sealed, maintenance-free architecture significantly simplifies preventive maintenance planning and eliminates a common failure mode associated with conventional worm gearboxes.

5. Cost-Effective Replacement for Planetary Gearboxes

The EP Series High Precision Worm Gear Units is specifically positioned as a high-value alternative to precision planetary gearboxes for applications where a 90-degree right-angle axis configuration is desirable. By replacing a costly precision planetary gearbox with a bevel stage with a single EP Series High Precision Worm Gear Units, machine builders achieve comparable or better backlash performance at a significantly lower component cost and a more compact installation envelope. This cost advantage scales well for OEM manufacturers producing equipment in volume—making it a commercially attractive choice for the growing automation sector across South and Central America.

Housing

Manufactured from high-strength aluminum alloy using a gravity die casting process, followed by a controlled heat treatment cycle to relieve internal stresses and stabilize dimensions. The result is a housing that is both stiff and lightweight, with excellent corrosion and weather resistance properties—suited to workshop and light industrial environments, including those with elevated humidity common in tropical regions of Colombia and other Latin American manufacturing zones.

Worm Shaft

Produced from high-quality alloy steel, case-hardened and precision-ground to achieve the surface finish and tooth profile accuracy needed for consistent meshing performance. The dual lead geometry is machined with specialized gear grinding equipment to maintain tooth thickness gradients within tight tolerances. Hardness and surface roughness are verified by in-process quality control at multiple stages.

Worm Wheel

The worm wheel is produced from a specially developed tin-bronze alloy that provides high tensile and fatigue strength alongside excellent resistance to adhesive and abrasive wear in worm gear applications. The bronze alloy's compatibility with the hardened steel worm creates a favorable tribological pair that maintains consistent tooth geometry over extended operating cycles, supporting the unit's ability to hold its locked backlash over many years of service.

Bearings & Lubricant

Oversized taper roller bearings are used for both the worm shaft and the output shaft, pre-loaded to increase system stiffness and eliminate internal clearance. The unit is charged with a full-synthetic, high-viscosity gear lubricant suited to the operating temperature range and speed envelope of worm gear drives. The sealed-for-life design eliminates the need for scheduled lubricant changes throughout the unit's normal service life.

Colombia — ICONTEC & RETIE

In Colombia, mechanical power transmission equipment used in electrical or automated installations must comply with applicable Normas Técnicas Colombianas (NTC) issued by ICONTEC, as well as the Reglamento Técnico de Instalaciones Eléctricas (RETIE) where electromechanical integration is involved. Importers should verify that gear units and associated servo drive systems meet the applicable safety and performance standards prior to installation in facilities subject to RETIE inspection.

European Union — CE & Machinery Directive

Units supplied into the European Union must comply with the Machinery Directive 2006/42/EC, requiring CE marking and a Declaration of Conformity from the machinery assembler. Gear units that form part of an incomplete machine must be accompanied by an Assembly Instructions document. ISO 6336 provides the calculation basis for gear tooth strength, and ISO 9001:2015 quality management certification is typically expected for CE-compliant suppliers.

United States — AGMA & OSHA

In the United States, gear unit performance and load capacity calculations follow AGMA (American Gear Manufacturers Association) standards—primarily AGMA 6022 for worm gear drives. Workplace safety requirements for machinery incorporating gear reducers are governed by OSHA 29 CFR Part 1910, which establishes guarding and lockout/tagout requirements. UL certification may be required for servo motor and control integration in certain applications.

Brazil, Mexico & Argentina

In Brazil, relevant technical standards are issued by ABNT (Associação Brasileira de Normas Técnicas), with ABNT NBR standards applying to mechanical transmission components used in regulated industries. Mexico's NOM (Normas Oficiales Mexicanas) standards and ANCE certification requirements apply to electromechanical systems. In Argentina, IRAM standards govern technical specifications. Importers in all three markets should review applicable Mercosur technical standards (NM) for machinery components.

CNC Machine Tools & Indexing Tables

In CNC milling centers, turning centers, and rotary indexing tables, the ability to position a workpiece to within a fraction of an arc minute is fundamental to part quality. The EP Series High Precision Worm Gear Units' adjustable sub-arc-minute backlash and high torsional stiffness make it a reliable choice for C-axis rotary tables, fourth-axis tilting heads, and servo-driven rotary fixtures where axis reversal accuracy directly determines machined part tolerances.

Automated Assembly & Robotic Arms

Light to medium-duty robotic joints and automated pick-and-place assembly systems benefit from the EP Series High Precision Worm Gear Units's compact right-angle geometry and multiple output configurations. The hollow shaft versions with shrink disc allow direct integration with robot arm structural members, while the dual output shaft version supports simultaneous load sharing or encoder feedback. The low backlash characteristic ensures precise, repeatable positioning throughout high-cycle operations.

Conveyor & Material Handling Systems

In industrial conveyor systems—whether for automotive parts, food products, or pharmaceutical packaging—the EP Series High Precision Worm Gear Units provides the torque capacity and positional control needed for step-index conveyors, accumulation tables, and precision transfer systems. The ability to drive multiple worm wheels in series from a single worm shaft input enables synchronized multi-point conveyor drives from a single servo motor, reducing system complexity and cost.

Food Processing & Packaging Machinery

The sealed, maintenance-free housing of the EP Series High Precision Worm Gear Units eliminates the risk of lubricant contamination in food contact zones—a critical requirement in food processing plants operating under INVIMA regulations in Colombia or equivalent food safety frameworks in other markets. The aluminum alloy housing resists the mild alkaline cleaning agents commonly used in food production environments, and the IP-rated seal versions maintain protection against washdown water ingress.

Precision Laser & Optical Equipment

For applications in laser cutting, laser engraving, and precision optical axis systems where micro-positioning of optical heads or beam deflection mirrors is required, the ultra-precision P0 grade (1 arc minute) provides the angular resolution needed for consistent cut quality. The low vibration transmission characteristic of worm drive geometry further benefits these applications by decoupling servo motor torque ripple from the driven load.

Mining & Heavy Industrial Equipment

Colombia's mining sector—encompassing coal operations in Cesar and La Guajira, gold extraction in Antioquia, and nickel mining in Córdoba—places demanding requirements on servo-driven positioning and feed drives. The larger EP 075 and 090 frame sizes, with output radial loads up to 15,000 N and output torques up to 460 Nm, are suited to the drill feed axes, gate valve actuators, and rotary screen drives found in mineral processing and extraction equipment.

Planetary Gearbox

Built with precision engineering and robust construction, our gearboxes deliver dependable torque multiplication, minimized backlash, and enhanced load capacity.

High precision worm gearbox