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TYRE COUPLINGS

Product catalog summary

Introduction
The UNE-FLEX tyre couplings are engineered to mitigate overloading effects, absorb vibrations, reduce noise, and safeguard systems from harmful vibrations. They feature a flexible body that compensates for misalignment and protect transmission system components. These couplings adhere to ATEX 95 regulations for use in potentially explosive environments.

General Characteristics
UNE-FLEX couplings eliminate the need for precise alignment and accommodate multiple displacements, thanks to advancements in rubber tyre technology. They can handle heavy loads at high speeds and consist of a neoprene tyre reinforced with synthetic mesh, absorbing various misalignments and preventing vibration transmission. They compensate for angular misalignments up to 3º, radial misalignments by 4 mm, and axial misalignments of 6 mm. The couplings require no lubrication and are easily replaceable without moving the motor shaft.

Fields of Application
UNE-FLEX couplings are utilized across various industries, including iron and steel, shipbuilding, compressors, mining, paper machinery, cement installations, pump installations, current generators, hoisting equipment, and machine-tools.

Example Application
In individual roller drives, UNE-FLEX couplings provide a highly flexible, backlash-free connection, preventing heat conduction from the roller to the gearbox and motor, isolating vibration and shock, and ensuring roller sagging does not affect the gearing.

Description
The UNE-FLEX shaft coupling is simple to assemble, with a few components. The rubber tyre is split radially for easy replacement without moving the machines. The design ensures the maximum torque is not exceeded.

Certificate of Conformity
UNE-FLEX flexible tyre couplings comply with Directive 94/9/EC for equipment intended for use in potentially explosive atmospheres. The technical documentation is deposited with a notified body, and the couplings cannot operate independently until part of a machine assembly declared in conformity with the directive.

Specifications and Procedures
The document details specifications and procedures for selecting and assembling UNE-FLEX Tyre Couplings for machinery driven by electric motors. It outlines necessary data for selecting the appropriate coupling, including motor type, power, speed, shaft diameters, starting torque, machine type, operation conditions, and frequency of starts.

Coupling Selection
The selection process involves calculating the nominal torque using a specific formula. The calculated value should not exceed the nominal torque indicated in the tables.

K-Coefficient Guidance
The document categorizes machinery based on load variability and provides guidance on calculating the K-coefficient for different machine types, crucial for selecting the appropriate coupling.

Assembly Instructions
Detailed assembly instructions include aligning the shaft, setting the cut tyres, and tightening the fastening rings. Special attention is given to high-speed couplings, recommending precise adjustments to avoid reducing the tyre's working life.

Replacement and Maintenance
Instructions for replacing worn tyres emphasize indicating the tyre number when ordering replacements.

Damping and Torsional Stiffness
The document explains the relationship between dynamic torsional stiffness and isolation, noting that isolation increases as torsional stiffness decreases, with data on torsional angles and corresponding isolation values.

Tables and Data
Includes tables with torque values, tightening torques, and other critical parameters for different coupling models, aiding in selection and maintenance.

Overview of jbj Techniques Limited
jbj Techniques Limited is a specialist supplier of high-quality products for the mechanical power transmission and fluid power sectors. The company is ISO certified and committed to international coordination and unification of industrial standards, offering a wide range of products, many ATEX certified to directive 94/9/EC requirements.

Product Range
jbj Techniques provides a broad selection of mechanical power transmission couplings and other products, including gearboxes, clutches, pumps, hydraulic motors, and various fluid power accessories.

Services
The company offers comprehensive services from specification and technical advice to manufacturing and after-sales support, with an in-house design team providing complete services including product specification, CAD-based system design, system build, and certification.

Customer and Supplier Relationships
jbj Techniques maintains strong relationships with customers and suppliers, ensuring high-quality service and customer trust.

Contact Information
jbj Techniques Limited is located at 28 Trowers Way, Holmethorpe Industrial Estate, Redhill, Surrey, RH1 2LW, United Kingdom. Contact via phone at 01737 767493 or email at [email protected].

Catalog excerpts

TYRE COUPLINGS Quality Products for Mechanical & Fluid Power

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an excellence in engineering www.jbj.co.uk/tyrecouplings.html tyre couplings cushion the effects of overloading, absorb vibrations, reduce noise and protect your system from the destructive effects of vibration. With a flexible body that compensates misalignment and protects other components in the transmission system, UNE-FLEX couplings can be produced in accordance with the requirements of regulation 94/9/CE (ATEX 95) of a group ll device, category 2G or 2D (zone 1) and temperature class T4. The fundamental element of the UNE-FLEX tyre coupling is a rubber tyre reinforced with a synthetic mesh....

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Contents — fflune The details contained within this catalogue are reproduced in accordance with the latest information at going to press

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CERTIFICATE OF CONFORMITY Corresponding to Directive 94/9/EC dated 23rd March 1994 The Manufacturer: MANUFACTURAS UNE S.A. CTRA. GI2632, KM7.8 – 20709 EZKIO ITSASO (GIPUZKOA) Certiﬁes that UNEFLEX ﬂexible tyre couplings described complies with Health and Safety Requirements according to enclosure II of the Directive (ATEX) referring to the design and construction of equipment intended for use in potentially explosive atmospheres. UNEFLEX FLEXIBLE TYRE COUPLINGS In accordance with art. 8 (1) of Directive 94/9/EC, the technical documentation has been deposited with Notiﬁed Body Nr.: 0163, J.M....

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Une-Flex Tyre Couplings General Characteristics The UNE-FLEX coupling eliminates the need for exact alignment. Its ability to achieve multiple displacements surpasses more complex coupling mechanisms, and operates with the simplicity and safety of a modern rubber tyre. This new coupling has been made possible by the technological advances that have contributed to the wonders of present day rubber tyres, designed to carry huge loads at high speeds and to withstand tremendous impacts. UNE-FLEX couplings can be produced in accordance with the requirements of regulation 94/9/CE (ATEX 95) of the device...

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Une-Flex Tyre Couplings fflune Selection: Couplings: In order to determine the type of coupling to be used the following formula should be applied: hp- . 7017. k n M = nominal torque. N = Driving-motor power (hp or kW). n = Minimum speed of the connected axles (rpm) k = Multiplying factor The value obtained on applying the formula should be less than or equal to that indicated in the tables of sizes and powers that refer to the corresponding coupling in the column "nominal torque". Value of K-Coefficient Notes: The values indicated in the above table are by no means applicable to every case....

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Une-Flex Tyre Couplings Example: The elevator bucket is driven by a motor of 16 kW; n=1.450 rpm., by means of a reducer whose outlet shaft rotates at a speed of n= 180 rpm. The motor and reducer are protected by a UNE-FLEX ﬂexible shaft coupling. 1. Coupling Between Motor And Reducer Elevator buckets ﬁgure in group 2 of the classiﬁcation under "variable load machinery". The multiplying co-efﬁcient k = 1,5 ﬁgures in the k value table under heading 2 and in the classiﬁcation of machines driven by "electric motor". Then, according to the power table. the appropriate coupling for a torque of 158...

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Une-Flex Tyre Couplings 1. Join the two halves of the coupling and fastening rings to the pivots of the shaft. 2. Draw back the machine with the two halves until the N measurement, as indicated in the table, is reached. 3. Align the shaft until distance ‘N' between the two halves of the coupling is reached. Normally, it is sufficient to carry out adjustments with simple measuring tools since small inaccuracies in the coupling assembly can be permitted. For high speed couplings, it is recommended to adjust more accurately with a gauge, since, if this is not done, the subsequent knocking could...

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Une-Flex Tyre Couplings Damping & Torsional Stiffness Resonance takes place when ^ j lies between ^ and^ Jjp j= 2 When p >3, the isolation can be considered as good. Fp = Perturbing frecuency. Usually the lowest rotating speed is taken. Fp = ^ r.p.m Fn = Natural frecuency For two rotating mass system, Fn= 1— \J Kldyn>|M+ *jR 2ji v ’ JmxJr Where JM+ JR=lnertia of the driving unit and the driver unit. 1^ _ A Transmitted torque dyn A Torsion angle The above illustrates that the isolation will grow when the dynamic torsional stiffness decreases, that is, when the torsion angle grows. Varying the...

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Une-Flex Tyre Couplings Shaft to Shaft Coupling M Series

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Une-Flex Tyre Couplings Shaft to Shaft Coupling 1 Series

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Une-Flex Tyre Couplings Shaft to Shaft Coupling DVA Series

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Une-Flex Tyre Couplings Shaft to Shaft Coupling SD Series

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Une-Flex Tyre Couplings Couplings with Taper Bushes T Series Advantages » There is no need to make keys. The coupling is ready for assembly. » It is possible to assemble the coupling on a different shaft, changing only the tapered bushing. » Easy removal by means of the extractor screw. *Before placing the tapered bushing on the coupling, everything must be cleaned. Only the screws can be greased before assembly.

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Une-Flex Tyre Couplings Couplings with Taper Bushes F Series Advantages » There is no need to make keys. The coupling is ready for assembly. » It is possible to assemble the coupling on a different shaft, changing only the tapered bushing. » Easy removal by means of the extractor screw. *Before placing the tapered bushing on the coupling, everything must be cleaned. Only the screws can be greased before assembly.

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Une-Flex Tyre Couplings Taper Lock Bushes Those requiring shallow keyway are marked with an asterix *

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Une-Flex Tyre Couplings Coupling with Brake Drum P Series

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Une-Flex Tyre Couplings Coupling with Disc Brake D Series

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Une-Flex Tyre Couplings Coupling with Disc Brake D Series

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Une-Flex Tyre Couplings Spacer Coupling MTD Series NB: MTD series can be used with FTD series connecting one half of each together.

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Une-Flex Tyre Couplings Spacer Coupling FTD Series NB: FTD series can be used with MTD series connecting one half of each together.

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