Traditionally, one of the primary barriers to anhydrous calcium technology being used in place of lithium has been its perceived limitations at higher operating temperatures.
A comparison of the dropping points will typically show conventional lithium technology to exceed that of anhydrous calcium by around 50°C. However, during this comparative study both technologies were tested on the FE-9 Bearing Life rig at 140°C with surprising results. The anhydrous calcium technology lasted longer under conditions that, in theory, should have favoured lithium.
In addition to traditional tests as a means of measuring performance and values, sustainability is increasingly encouraging us to understand our products in terms that are less familiar.
Product Carbon Footprints (PCFs) reflect the carbon emitting potential of products across their entire life cycle.
Therefore, as part of the comparative study, PCFs were also considered from a cradle to gate perspective with the result being that the calcium based technology gave a 14% lower PCF value than the lithium grease.
Taking into account all tests conducted, the overall conclusion from the authors of this study was that like-for-like, the anhydrous calcium grease was equal if not better than the lithium thickened product.
Final reflections
The main purpose of this piece was to highlight how environmental sustainability and the energy transition were creating a climate for change for lubricating grease, challenging long held traditions and encouraging new perspectives.
Whilst change of any kind can cause uncertainty, it can also be a source of inspiration from which to explore and progress with renewed energy, purpose and perspective.
It was once said that “necessity is the mother of invention” and the impact of an emerging EV market on lithium technology certainly created a need for the grease community.
Inspired to explore anhydrous calcium technology more deeply has revealed hidden strengths with the performance potential to serve the needs of traditional values as well as those of a future in transition.
axelch.com
Figure 6: Figure 6: FAG FE-9 Bearing Life Test. Comparative Data @ 140o
C
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LUBE MAGAZINE NO.188 AUGUST 2025
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