Turning Ideas into
Engineered Solutions

Aftermarket Bearings for
Tunnel Boring Machines
Slewing ring bearings in a tunnel
boring machine are subject to
tremendous wear and abuse, and
most need replacing regularly. But
frequent purchases of OEM bearings at
OEM prices put a strain on any
operating budget. Now Kaydon offers
you two ways to save money without
compromising performance — by
manufacturing new replacement
bearings, or remanufacturing your
worn bearings. Both methods result in
top-quality slewing rings that meet
your performance requirements at
substantial savings.

New Replacement
Kaydon Corporation Bearings
Division can make a replacement for
any slewing ring bearing, regardless
of OEM. We have a comprehensive
reverse-engineering capability and
three manufacturing plants, all
certified for ISO 9001:2000. Every
project begins with a thorough
inspection and NDT evaluation of the

customer’s slewing ring. The part
then undergoes engineering
evaluation, which often yields design
improvements that will not affect
interchangeability.

Remanufactured
Remanufacturing is not a sideline for
Kaydon, but a dedicated program
with its own personnel, equipment
and inventory. All remanufactured
bearings come with a warranty equal
to a new bearing. Highlights include:

■■

free inspection and noobligation evaluation

■■

multi-step inspection and NDT

■■

engineering review and
recommendations

■■

raceways precision-ground
to proper geometry and load
capacity

■■

new rolling elements

■■

replace separators and
lubricant