Chromex 40 steel is the result of nearly 50
years experience working in and meeting the demands of the
aerospace bearing industry. It is now available to meet the
ever increasing requirements of general industrial applications.
The chemical composition of Chromex 40 is very different from
that of 100Cr6 (AISI 52100) and 440C. The large carbides and
carbide networks (0.003”-0.004”) well known in
440 C and 52100 do not exist in Chromex 40. Instead, there
is a homogenous structure of finely dispersed carbon nitrides
(<0.004”). The large carbides of 440C can be sites
of potential failure under mechanical loading.
Some advantageous features of Chromex 40 include:
- Lower bearing noise
- Smoother surfaces (giving improved ball/raceway contact
leading to longer life)
- Higher rolling contact fatigue resistance
- Better dimensional stability
- Better corrosion resistance (due to the presence of chromium)
- Cooler running
- Better speed capability
- Higher reliability under poor lubrication
In combination with silicon nitride balls (ceramic), a hybrid
bearing has evolved providing for excellent results in very
demanding applications. The balls have a mass of only 40%
of their steel equivalents, and so develop a centrifugal loading
of only 16%. This results in lower contact stresses at the
raceway and improved dynamic behavior.
Please contact Pacific International Bearing at 800-228-8895,
or at info@pacificbearingsales.com
for a full range of products available in this special material.
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