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Centa CENTAX-L - User Manual

Centa CENTAX-L
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CENTAX-L
Assembly and operating instructions
016L-00050…00090-FS10
M016-00003-EN
Rev. 3

Table of Contents

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Overview

The CENTAX-L, specifically model 016L-00050...00090-FS10, is a highly elastic coupling designed for power transmission, emphasizing reliability and innovation. This device is engineered to compensate for torsional vibrations and impacts without wear, making it suitable for applications requiring robust and maintenance-friendly operation.

Function Description

The CENTAX-L coupling serves to connect shafts, transmitting torque while accommodating axial, radial, and angular misalignments. Its design incorporates rubber elements that are crucial for its highly elastic characteristics, allowing it to dampen vibrations and impacts effectively. The assembly process involves mounting hubs onto shafts, followed by the installation of link flange assemblies and the links themselves. The coupling is designed for specific rotational directions, either clockwise (cw) or counterclockwise (ccw), which is determined during installation. The overall function is to provide a reliable and smooth power transmission, protecting connected machinery from excessive stresses due to misalignments and dynamic loads.

Important Technical Specifications

The CENTAX-L coupling is characterized by several key technical specifications that ensure its performance and compatibility. It offers compensation for major axial, radial, and angular displacement, which is critical for maintaining operational integrity. The coupling is designed for low-maintenance operation, with easy visual inspection of components. Fast exchange of components is a feature, simplifying repairs and reducing downtime. The design is protected by international patents, and the type approval comes from leading classification agencies. The coupling is tested and proven over thousands of hours in tough daily operation since 1992, attesting to its durability and reliability.

Specific alignment tolerances are provided for axial, radial, and angular misalignments. For axial alignment, the permissible axial alignment tolerance (ΔKA max) is 0.5 mm. Radial alignment tolerances (ΔKR max) vary depending on the coupling size and Shore hardness of the rubber elements, ranging from ±0.15 mm to ±1.2 mm for Shore A hardnesses of 45/50 to 70. Angular alignment tolerances (SW max) are also specified, varying with SAE J620 DIN 6288 sizes and R values, from 0.7 mm to 1.9 mm.

The coupling components, particularly the hubs, require specific heating temperatures (170° - 200°C) for mounting onto shafts, ensuring a secure interference fit. The use of hydraulic pumps for mounting and dismounting is recommended, with specific oil viscosities (300 mm²/s at 20°C for mounting, 900 mm²/s at 20°C for dismantling) and maximum pressures (3000 bar for expanding the hub and 1500 bar for expanding the hub during dismantling).

Usage Features

The CENTAX-L coupling is designed for straightforward assembly and operation, though adherence to specific instructions is crucial for safety and optimal performance.

  • Installation: The assembly process involves several steps, including mounting the hub with cylindrical bore and keyway, mounting the hub with conical oil interference fit, positioning the link flange assembly, and mounting the links. Detailed figures (e.g., Fig. 6-1 to Fig. 6-10) illustrate these steps. Proper heating of hubs/flange hubs is required for mounting, and specific tightening torques for screws and bolts must be observed.
  • Safety: The manual emphasizes safety with warnings about hot coupling components, rotating parts, and the need for protective gloves and goggles. It also highlights the importance of correct assembly to prevent injury and material damage. Non-compliance with operating instructions, incorrect heating, and improper handling of hydraulic fluids are identified as potential hazards.
  • Storage: Components must be stored in a moderately ventilated and low-humidity environment, protected from ozone-producing devices, UV light, solvents, disinfectants, fuels, and lubricants. Rubber parts have a maximum storage life of 5 years from the production date.
  • Disposal: The coupling parts must be separated where possible and sorted according to material type for environmentally responsible disposal.

Maintenance Features

Maintenance of the CENTAX-L coupling focuses on regular inspection and timely replacement of worn components to ensure continuous safe and efficient operation.

  • Care and Maintenance: The coupling requires low maintenance, but regular scheduled maintenance intervals are important. A visual inspection of the complete unit is recommended every 12 months.
  • Cleaning: Any loose dirt should be removed from the coupling.
  • Visual Inspection: Regular visual inspections are recommended for cracks, chips, or missing parts in the coupling and for the rubber bushes of the links (every 12 months). Squash folds and small cracks up to 1 mm may be considered normal, but deeper cracks or detachment of the rubber-to-metal bond necessitate replacement of the links.
  • Inspection of Screw Connections: Tightening torque levels of all screws must be checked and corrected if necessary.
  • Replacing Defective Parts: Worn coupling components or defective parts should be removed and replaced as described in the dismantling and assembly chapters. Links are packaged in sets, and all links in a set should have the same weight. Only complete sets of links should be mounted or replaced.
  • Troubleshooting: The manual provides a troubleshooting table for common faults such as running noises/vibrations, breakage of rubber elements, and inadmissibly high torque, along with possible root causes and remedies. These remedies typically involve switching off the plant, checking alignment, or exchanging defective parts.
  • Spare Parts: A stock of the most important wearing and spare parts is recommended. Only original CENTA spare parts should be used to avoid injury and material damage. When ordering spare parts, the order number, coupling order number, and drawing number should be provided.

Centa CENTAX-L Specifications

General IconGeneral
BrandCenta
ModelCENTAX-L
CategoryIndustrial Equipment
LanguageEnglish