Motion Control & Drives


High strength bolting solutions

March 2024 Motion Control & Drives

BMG’s Nord-Lock Expander System pivot pin components offer dependable solutions that combat the challenges of lug wear in the marine and shipping sector. Pivots, which are at the centre of any rotational movement, often experience lug wear, which occurs due to the clearance between the bore and the conventional pin. This is commonly repaired with line boring, a technique associated with high costs and protracted downtime.

“Through Nord-Lock’s advanced Expander System, which embraces advanced pivot pin technology, BMG specialists are able to supply the correct pivot to prevent problems that lug wear causes to mobile cranes at harbours. This maximises uptime, enhances safety on site, and minimises maintenance costs,” says sales manager, Maryna Werner. The Expander System, which comprises an assembly that includes an axle tapered at both ends, two expansion sleeves, two tension washers, and two fasteners, has been designed for convenient onsite repairs. Even in a situation where the lugs are badly worn, a repair can be made in the field, with minimum downtime. The sleeves of the Expander System simply expand to conform with the wear pattern and lock the system in place, without the need for time-consuming and costly welding and line boring. Once retorqued, the system locks from both sides, significantly increasing stability.

This system has also been designed to improve safety on site. By replacing a traditional straight pin with an Expander System pivot pin of the same diameter, the risk of axle breakage is reduced, and the strength of the machine is enhanced through the system’s double-sided axial locking design.

There are many other benefits, which include a permanent solution to lug wear, quick and easy installation and removal, increased service life of bushings, bearings and seals, and greater safety. A key advantage of this system over conventional pivot pins is pressure distribution. A conventional system only distributes the load onto a very small area, where the Expander System distributes pressure over the whole contact area in the direction of the force. There is no need for additional fastening holes, threads or welding of locking rings on the machine, and no need for fine machining in the lugs, as this system makes it possible to use wide tolerances. The Expander System can also be combined with Nord-Lock washers for enhanced efficiency in vibration-intense applications.

BMG’s customised Expander System pivot pins are specifically adapted to suit exact requirements through the use of specific materials, hardening treatments, surface coatings, and the correct tolerance for each application. The system is also suitable for use in many other industries, including construction, steel, railway, bridge building, mining and quarrying, forestry and agriculture, manufacturing and processing, shipbuilding, power generation, oil and gas, transportation, and machine building. BMG specialists work closely with customers in all sectors to offer a complete service solution, where the team’s technical expertise supports quality structural fasteners and fastening components.


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Control without complexity
Editor's Choice Motion Control & Drives
In an era where precision, performance and smart control define industrial success, the right driver can make all the difference. At Axiom Hydraulics, we’ve seen firsthand how the Sun Hydraulics XMD series transforms hydraulic systems, from mining and construction to agriculture and automation.

Read more...
Servo motor series for explosive environments with expanded certification
Parker Hannifin - Sales Company South Africa Motion Control & Drives
Parker Hannifin’s ongoing commitment to safety and performance in hazardous environments is evident in the new certifications and product improvements for its EY and EX servo motor series.

Read more...
Industrial gear units for mixing and agitating processes
Bearing Man Group t/a BMG Motion Control & Drives
Nord Drive Systems encompass modular drive configurations that ensure optimum performance of mechanical speed control for specific applications in almost every industry.

Read more...
A seamless partnership driving smart material flow
Omron Electronics Motion Control & Drives
OMRON and Interroll have launched a flexible conveyor module designed for seamless integration with autonomous mobile robots. This innovative solution enables efficient material handling, enhancing productivity in various industrial settings.

Read more...
Building resilience in extreme environments
ACTOM Electrical Machines Motion Control & Drives
The petrochemical and oil and gas sectors operate in unforgiving environments. In this high-stakes industry, operational efficiency is vital, and unplanned downtime can have severe consequences. To thrive in this demanding landscape, a proactive and sophisticated approach to maintenance is no longer an option, but a necessity.

Read more...
Reducing the risk of sewage spills
Motion Control & Drives
The UK government has announced plans to impose tougher penalties on water companies in England and Wales that fail to prevent sewage discharges into rivers and seas. David Strain, technical director at the automation systems specialist, Technidrive explains how solutions like variable speed drives and smart monitoring systems can help water companies reduce the risk of sewage spills and ensure compliance.

Read more...
Bearing failure analysis transforms operations of battery manufacturer
SKF South Africa Motion Control & Drives
Persistent bearing failure on a centralised extraction fan motor was negatively impacting operational efficiency for a leading battery manufacturer in East Africa. SKF Kenya conducted a bearing analysis and solved the problem.

Read more...
Why turbomachinery should break free from vendor lock-in
Schneider Electric South Africa Motion Control & Drives
Today’s modern turbomachinery control systems form an important of operational efficiency, be it in heavy industries, traditional power generation or renewables such as hydroelectric facilities. Independence is the name of the game, and turbomachinery stands to gain lot from this newfound freedom.

Read more...
Bearing strategy maintains production for cement manufacturer
SKF South Africa Motion Control & Drives
SKF South Africa and its Authorised Distributor, Bolt & Engineering Distributors Klerksdorp successfully remanufactured a double-row tapered roller bearing assembly for a vertical mill within a two-week timeframe, offering the customer a cost-effective 50% cost-saving alternative which keeps the plant operational while they await the supply of new bearings.

Read more...
Lubrication solutions for cranes
Motion Control & Drives
Fuchs Lubricants South Africa provides a comprehensive range of lubrication solutions that meet the specific needs of mobile cranes.

Read more...