John Crane’s Metastream® M Series couplings improve plant performance.
FLEXIBLE POWER TRANSMISSION COUPLINGS
Power transmission couplings
John Crane power transmission couplings help deliver a reliable performance and provide a cost-effective solution in demanding applications.
Overview
Power transmission couplings are designed to transfer power from one shaft to another in rotating equipment.
Couplings can accommodate misalignment, reduce the transmission of shock loads, and provide a disconnection point for maintenance or modification of the machinery.
Selecting the right type of power transmission coupling
When it comes to power transmission coupling, the decision to use one type over another depends on:
- Amount of torque to be transmitted
- Equipment speed
- Type of machines being connected
- Equipment bearing arrangement
- Space envelope available
- Degree of misalignment present
- Operational environment
Among the different types of power transmission couplings, either rigid, elastomeric, disc or diaphragm, each has specific design features that make it suitable for a particular application and operating conditions.
PRODUCTS
Our power transmission couplings products
Disc couplings
John Crane’s Metastream® supports plant safety, reliability and profitability.
Elastomeric couplings
John Crane’s Powerstream® limitless shelf-life inserts will reduce downtime.
Rigid couplings
John Crane’s Metastream® design innovation simplifies pump impeller settings.
Turbomachinery couplings
John Crane’s H Series protects mission-critical turbomachinery operations.
IN MORE DETAIL
Primary functions of power transmission couplings
The main processes of power transmission couplings include:
- Transmitting power: Power transmission couplings connect two shafts to efficiently transfer power from one to another.
- Accommodating misalignment: Flexible couplings for power transmission are designed to tolerate shaft misalignments without causing stress or damage.
- Facilitating maintenance: Couplings for power transmission serve as a disconnection point for easier machine disassembly and maintenance.
- Safety and overload protection: Many power transmission couplings act as a safety device, failing in a controlled manner under overload conditions to protect connected machinery components.
- No-slip power transmission: Rigid, disc and diaphragm couplings provide a direct connection for accurate, slip-free power transfer.
- Reducing wear and tear: By compensating for misalignment and reducing transmitted loads, power transmission couplings help minimise wear on bearings, mechanical seals and other rotating equipment components.
- Reducing maintenance and downtime: For non-lubricated couplings (disc, diaphragm, elastomeric or rigid), there is no need for regular maintenance checks and lubrication, resulting in increased uptime and plant profitability.
- Conserving the environment: Disc and diaphragm couplings are designed for infinite life, therefore minimising your carbon footprint and lifecycle costs.
John Crane Performance Plus™
John Crane Performance Plus™ is our modular service framework, supported by the largest mechanical seal service network, with over 200 manufacturing, sales and service centres globally. That means we are where you need us, when you need us – empowering people, plant and performance.
FREQUENTLY ASKED QUESTIONS
Common questions
What is a coupling in power transmission?
In power transmission, a coupling is a mechanical device that connects two rotating shafts to reliably transfer torque. John Crane’s power transmission couplings are engineered to accommodate misalignment, reduce shock loads and help protect connected equipment while maintaining efficient, slip-free power transfer.
What is a transmission coupling?
A transmission coupling is used to transmit power between driving and driven shafts in rotating machinery. John Crane transmission couplings are designed to support precise torque transfer, manage misalignment and enhance equipment reliability across industries.
What are the four types of couplings?
The four common types of power transmission coupling are rigid, elastomeric, disc and diaphragm. Each kind offers specific performance characteristics. John Crane provides flexible couplings for power transmission alongside rigid designs, enabling reliable operation under varying torque and environmental conditions.
Further reading
Read our power transmission couplings insights and case studies
CASE STUDY
Hungarian oil refinery improves power recovery system with John Crane coupling upgrade
WHITE PAPER
Consider disc couplings for reduced downtime, lowered maintenance costs and increased safety
CASE STUDY