Overview
The document provides a detailed guide on CMD Durand worm gear units, emphasizing their robust design, noiseless operation, easy maintenance, compactness, and accuracy. These gear units are designed for high torque transmission in limited spaces and are suitable for various industrial applications.

Design and Specifications
The CMD Durand gear units are available in various sizes and configurations, including the N series and JUMBOFLEX range. They are designed to meet demanding industrial applications and can be customized for specific requirements. The document details the selection method, mechanical and thermal ratings, and provides guidelines for selecting the appropriate gear ratio and service factor.

Accessories and Options
Various accessories and options are available, including special shafts, torque arms, shock absorbers, sensors, and lubrication systems. These can be tailored to fit specific application needs.

Quality Control
CMD Durand ensures quality through rigorous inspections and testing, adhering to ISO 9001:2000 standards.

Selection and Application
The document provides detailed instructions on selecting the appropriate reducer type based on gear ratio, service factor, and torque requirements. It also includes guidelines for checking thermal power and maximum permissible torque.

Service Factor and Machine Classification
Service factors are determined based on application conditions, with tables provided for calculating factors related to ambient temperature, operating position, loading cycle, and starting conditions.

Specifications:
The document provides detailed specifications for various sizes of mechanical reducers, specifically focusing on the JUMBOFLEX Worm Reducer. Key parameters include service factor, design life, and the use of polyglycol synthetic oil. The sizes range from 160 to 1250, with different ratios and power ratings.

Mechanical Power Ratings:
Mechanical power ratings (P1) and output torque (Mt2) are provided for different sizes and ratios. The document specifies the absorbed power on the worm shaft and the corresponding output torque on the low-speed shaft. The data is organized in tables for easy reference.

Thermal Power Ratings:
Thermal power ratings (Pth) are given both with and without a cooling fan, at an ambient temperature of 20°C. These ratings are crucial for understanding the heat dissipation capabilities of the reducers under different operational conditions.

Dimensions and Weights:
The document includes detailed dimensions and weights for each size of the reducer, specifying both Type F and Type C configurations. This section is essential for installation and integration into existing systems.

Lubrication and Maintenance:
Oil spray lubrication is recommended for these reducers, and the document advises consulting CMD for specific maintenance procedures. This ensures optimal performance and longevity of the equipment.

Recommendations:
For multi-reduction reducers, the document suggests consulting CMD for detailed guidance. This highlights the importance of expert consultation for complex configurations.

Conclusion:
This technical document provides comprehensive data on the JUMBOFLEX Worm Reducer, covering mechanical and thermal power ratings, dimensions, and lubrication requirements. It serves as a critical resource for engineers and technicians involved in the selection, installation, and maintenance of these mechanical systems.

Installation
CMD gearboxes undergo bench and conformity tests before dispatch. During installation, ensure careful alignment of shafts when using couplings, and consider protective screens in heat-exposed environments.

Lubrication
Units are supplied without oil; users must fill them with the correct oil as per manual B-11-4303. Synthetic oil PolyGlycol grade 220 is recommended for most applications. Bearings may require oil or EP grease depending on conditions.

Commissioning
Progressively load gearboxes during commissioning to adapt contact patterns. For units with external lubrication systems, start the lubrication system before the reducer.

Storing
Reducers are protected with a lubricant layer and anti-corrosion substance for up to 3 months. Store in dry places above 5°C, free from vibrations.

Worm Gear Sets
CMD Durand specializes in high-quality worm gears for various industries. Standard center distances and ratios are provided, with options for custom designs. The gears are manufactured with precision using CNC machines.

Applications
CMD worm gears are used in industries such as robotics, rubber, steel, army, film, transportation, material handling, energy, navy, astronomy, and machine tools. Specific examples include coal mills, marine propellers, handling robots, and radar antenna drives.

Technical Specifications
CMD offers a range of worm gear sets with various center distances, gear ratios, and materials. The gears are designed for high precision and durability, with adjustable backlash options available.

Special Worm Gear Sets
CMD provides specialized worm gear sets for applications like Raymond coal pulverizers and printing machines, offering solutions for high power transmission and precision requirements.

Specifications and Features:
1. Printing Accuracy: Achieved accuracy is +/- 0.03 mm, ensuring precision in operations.
2. Clarifiers - Complete Drives: Gear motors with vertical output shafts and torque range from 20,000 Nm to over 1,000,000 Nm. Features include high reduction ratios and adjustable scraper positions.
3. Sugar Industry - Mixers Drive: Geared motors with worm gear reduction, continuous operation, and torque range from 80,000 to 600,000 Nm. Equipped with safety sensors and electronic monitoring.
4. Barring - Inching Drive: Auxiliary drives for starting high inertia machines with options like hydraulic coupling and braking systems.
5. Steel Industry - Screw Jacks Worm Gearboxes: Used for mill adjustments with components like steel housing and oil injection lubrication.
6. Processing Industry - Shearing Machine: JUMBOFLEX worm gearbox drives with high torque and oil injection lubrication.
7. Incineration Plant: Gear motors with high reduction ratios and features like torque limiter and speed control.
8. Water Level Control - Dam Gate Drive: Gear motors with high reduction ratios, equipped with chain wheel and electronic load control.
9. Aerial Cableway: Drive system with DC motors and a stand-by diesel motor, featuring a special clutch device for quick transfer between motors.