Couplings for mechanical power transmission

A coupling is a device used to connect facing ends of two shafts together to transmit mechanical power from the driver to the driven. Rigid couplings are used in applications where the two shafts are more precisely aligned, but flexible couplings allow for issues such as angular, axial and parallel misalignment which are more common in many industrial applications.
jbj Techniques hold in stock a wide range of mechanical power transmission couplings in a wide range of sizes for quick despatch. jbj Techniques also have the technical expertise to assist you in the specification of the best coupling for your needs and extensive machine shop services, all in-house to enable prompt despatch of those more bespoke couplings, large or small in size and quantity.

Couplings quality guarantee from jbj Techniques Limited

High quality mechanical and fluid power products are always available straight from our comprehensively stocked warehouse, but, we are more than that! If you need more, be it the smallest drive component through to complex drive line component packages, then speak to our experienced sales team who will provide a solution based upon your application requirements. Quick delivery times even for bespoke mechanical power transmission couplings due to the comprehensive in-house machining facilities.
telephone: +44 (0)1737 767493
email: info@jbj.co.uk

Range of couplings from jbj Techniques Limited

Each of these coupling links below includes full technical specification catalogues.

Jaw couplings / spider / Spidex® / torsionally flexible.
Gear couplings / steel gear hubs, nylon drive sleeve / Dentex® / torsionally rigid.
All steel gear couplings / steel gear hubs steel drive sleeve / Hercuflex® / torsionally rigid/ ATEX certificated.
JXL couplings / anti-static / flameproof / pin and bush / torsionally resilient / ATEX certificated.
Grid couplings / torsionally flexible.
Torsional couplings / dampen torsional vibrations.
S-flex couplings / dampen vibration and control shock / torsionally soft.
Disc couplings / high endurance to fatigue, and resistance to most environmental conditions / ATEX certificated.
Tyre couplings / torsionally flexible / ATEX certificated.
Magnetic couplings / power transmission between hermetically separate areas / ATEX certificated.
Torque limiting couplings / protection from mechanical overload.

Power transmission couplings; a summary of the different types available from jbj Techniques:

Spider Couplings ~ curved & straight jaw couplings

Spidex® torsionally flexible shaft couplings, also known as jaw couplings, enable the connection of shafts or flanges via a polyurethane drive ring.

The flexibility of the drive ring allows the power transmission coupling to compensate for parallel, angular and axial displacements.

Maximum shaft diameters of 145 mm can be accommodated with maximum torques up to 15,000 Nm and maximum speeds of 19,000 rpm.

» Link to Spider Couplings web page

couplings: mechanical power transmission spider coupling

Gear Couplings ~ steel gear hubs with nylon drive sleeve

Dentex® torsionally rigid, power transmission couplings which transmit torque between two steel gear hubs and the internal toothing of a nylon drive sleeve.

The gear coupling is designed to release neighbouring shaft bearings from non-controlled additional bearing loads.

Maximum shaft diameters of 100 mm can be accommodated with maximum torques up to 2,400 Nm and speeds up to 8,000 rpm.

» Link to Gear Couplings web page

couplings: mechanical power transmission gear coupling

All Steel Gear Couplings ~ steel gear hubs with steel drive sleeve (ATEX)

Hercuflex® torsionally rigid, power transmission couplings which transmit torque between two steel gear hubs and the internal toothing of a steel drive sleeve.

Gear couplings have the highest power density, offer more variations, a wider size, torque, and bore capacity than any other coupling type.

Easily modified for shear pin service, floating shaft type, vertical applications, electrical isolation, limited end float, and can have a brake drum or disc added.

» Link to All Steel Gear Couplings page

couplings: mechanical power transmission all steel gear coupling with ATEX certification on request

JXL Couplings ~ pin and bush style anti-static / flameproof (ATEX)

ATEX certificated to Directive: 94/9/EC II2GD-IM2-T6.

Torsionally resilient couplings, of pin and bush design, comprise of two fully machined steel flanges which are coupled via a series of drive pins and 'hytrel' flexible elements. The elements have the ability to absorb shock loads and dampen vibration.

Maximum shaft diameters up to 400 mm with torques of 300,000 Nm and speeds up to 11,000 rpm can be accommodated.

» Link to JXL Coupling web page

couplings: mechanical power transmission jxl anti-static, flameproof coupling with ATEX certification on request

Grid Couplings

Torsionally flexible and resilient, vibration reduction up to 30%, plus cushion shock loads safeguard driving and driven equipment.

Quick installation and easy maintenance reduces labor and downtime costs. Fully interchangeable with industry standards.

Versatile stock; metric and imperial size cover fasteners available. High tensile, shot-peened alloy steel grids and precision machined hubs ensure superior performance and long life.
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» Link to Grid Couplings web page

couplings: mechanical power transmission grid coupling

Torsional Couplings

Dampen torsional vibrations and tune the system to have critical speeds outside the operating range.

These torsional couplings solve torsional vibration problems typical of those found in diesel engine applications. Torsional couplings dampen torsional vibrations and tunes the system to have critical speeds outside the operating range.

jbj Techniques Ltd can analyse the application with our computer programme and determine the exact torsional coupling needed for almost any application.

» Link to Torsional Couplings web page

couplings: mechanical power transmission torsional coupling

S-Flex Couplings

The simple design of the S–Flex coupling ensures ease of assembly and reliable performance. No special tools needed for installation or removal. S–Flex couplings can be used in a wide variety of applications.

The S–Flex flanges are offered in five models which are made from zinc die cast or cast iron. Sleeves are available in EPDM rubber, Neoprene, or Hytrel® to address a wide variety of application requirements.

Thirteen sizes are available with torque capabilities that range from 60 in-lbs (6.78 Nm) to 72,480 in-lbs (8189 Nm).

» Link to S-flex Couplings web page

couplings: mechanical power transmission s-flex coupling

Disc Couplings ~ (ATEX)

jbj Techniques offer a wide variety of superior disc coupling products in models designed to meet the application needs of today’s worldwide power transmission market.

Implementation of Finite Element Analysis, and extensive testing of materials, an innovative disc pack profile design has been developed, revolutionary to traditional disc pack designs found in the market.

Manufactured using high grade stainless steel (AISI-301), for high strength, high endurance to fatigue, and resistance to most environmental conditions.

» Link to Disc Coupling web page

couplings: mechanical power transmission disc coupling with ATEX certification on request

Tyre Couplings ~ (ATEX)

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 tyre coupling is a neoprene rubber tyre reinforced with a synthetic mesh. It adapts itself to the working conditions, absorbing axial, radial, angular and torsional misalignments and prevents vibration via the transmission to the machines to which they are coupled. Compensates for angular misalignments to 3º, radial misalignment by 4 mm, and axial misalignment of 6 mm.

» Link to Tyre Couplings web page

couplings: mechanical power transmission tyre coupling with ATEX certification on request

Permanent Magnetic Couplings ~ (ATEX)

Hermetically separate two areas whilst continuing to transmit mechanical power from one to the other with these couplings ideal for applications where prevention of cross contamination is essential.

The magnetic coupling works by using the power generated by permanent magnets. No external power supply is needed. These are permanent magnets not electro-magnets. ATEX compliance (on request) is yet a further advantage for using these excellent power transmission couplings.

There is no need to alter your system as the magnetic coupling will be designed to suit your machinery.

» Link to Magnetic Couplings web page

Torque Limiting Couplings

Protect mechanical equipment, or its work, from damage from mechanical overload.

Torque limiting couplings are designed for machines with chain, gear or belt drives to prevent over-loading of sensitive motors, gearboxes and machine components. High quality torque limiting couplings, fully-machined components with a special rustproof surface coating. This series of torque limiters are completely enclosed to prevent dirt from contaminating the interior.
They allow stepless adjustment of the required slip torque, even when already installed. Torque limiting capacity up to 23,000 Nm.

» Link to Torque Limiting Couplings web page

couplings: mechanical power transmission, torque limiting coupling

Coupling Element Sizing Chart

Coupling element size comparison chart (up to Spidex S/CJ125 & Dentex B80)

Simply size your coupling, decide the shore hardness colour and contact us immediately. See yellow (Pump Drive Component) catalogue for technical specifications, power, torque, speeds & other selection data.

Coupling elements can be sized even from a partial remnant of a very worn out coupling element. Very useful if you are an end user of a power transmission system designed and built by a supplier in years past without being supplied the necessary maintenance and ordering information.

» Link to Coupling element chart web page

A Coupling for the Bloodhound Super Sonic Car . . . 1,000 mph!

The scope of supply was to produce a suitable drive coupling with a maximum diameter of 160 mm which is capable of transmitting 550 Nm @ 10,000 rpm, needed to be as short an assembly as possible and at the same time be able to accept misalignment within the drive-train.

» Link to BSSC coupling page web page