The Technical Challenge Behind Three 
Oversized Marine Slewing Rings
How Newtown Bearing Company combined specialist engineering expertise, commercial 
understanding and complex logistics to deliver three oversized marine slewing rings.
When a marine engineering client 
approached QCB Bearings, a division 
of NBC Group, for a large-scale slewing 
bearing solution, the project presented 
a combination of demanding technical, 
commercial and logistical challenges.
The initial requirement appeared 
straightforward. The customer had 
selected a slewing bearing directly 
from a catalogue and requested a 
budget quotation based on their chosen 
specification. However, several months 
later, a detailed technical review identified 
a critical issue: the original catalogue 
selection was not capable of reliably 
meeting the operational demands of 
the application.
‘The scale of the project added 
another layer of complexity.’ 
The requirement was for three six-
metre triple-row slewing rings, each 
weighing more than nine tonnes, with 
the completed bearings destined for 
shipment to the EU. Ensuring the correct 
engineering solution was therefore only 
part of the challenge; manufacturing 
coordination, inspection, assembly and 
international logistics would all need to be 
carefully managed.
QCB undertook a comprehensive 
engineering assessment of the 
application, reviewing the operating 
requirements and carrying out the 
necessary calculations to establish a 
technically appropriate slewing ring 
specification. A revised quotation was 
subsequently produced based on the 
actual performance requirements rather 
than the original catalogue selection.
While the engineered solution provided 
the required performance and bearing 
life, the customer also faced significant 
budget and logistical constraints. Rather 
than simply supplying the originally 
specified product or stopping at the ideal 
technical solution, Newtown Bearing 
Company and QCB worked closely with 
the customer to understand the wider 
commercial requirements of the project.
This detailed review allowed the team to 
identify a high-performance solution that 
addressed the application requirements 
while also meeting the customer’s 
commercial expectations. The approach 
demonstrated the importance of 
combining engineering expertise with a 
practical understanding of the realities 
surrounding major industrial projects.
With the specification agreed, QCB also 
coordinated the final assembly, inspection 
and preparation of the three oversized 
bearings for international transportation. 
At six metres in diameter and weighing 
more than nine tonnes each, moving 
the finished components represented a 
significant logistical undertaking in its 
own right.
The project ultimately resulted in the 
successful delivery of three massive 
triple-row slewing rings, prepared for 
marine transport to the EU.
More importantly, the project 
demonstrated QCB’s ability to provide far 
more than standard catalogue bearing 
supply. From application assessment 
and design validation through to 
manufacturing coordination, inspection 
and international freight preparation, the 
project required specialist knowledge at 
every stage.
For demanding applications where 
standard catalogue solutions may not be 
enough, the combination of engineering 
capability, product knowledge and 
practical commercial thinking can make 
the difference.
Contact here:
+44 1952 222400
sales@newtownbearings.co.uk
www.newtownbearings.co.uk
A six-metre slewing ring
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