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Is filling every empty space in a bearing housing a valid grease-quantity rule?

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Identify which quantity the instruction actually specifies

A lubrication instruction may describe the initial bearing fill, a proportion of housing free space, or the amount added during a maintenance event.

Those descriptions are not interchangeable. NSK's guidance relates housing fill to speed and other conditions, illustrating why total empty volume is not a universal target. The exact housing, grease and purge arrangement also affect the applicable method. Before adding material, label the specified quantity and its unit on the job sheet. A statement that “the housing can hold more” does not establish that more grease is needed, and a replenishment dose should not be substituted for an initial-fill instruction.

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Translate a specified dose into a verifiable maintenance record

If the authorised instruction gives a mass, retain that mass in the record and establish how the delivery method relates to it.

For example, if an actual measurement under the applicable procedure established 1 g per stroke, ten comparable strokes would represent approximately 10 g. Those numbers are an illustrative conversion, not a recommended dose or a claim about any particular grease gun. Delivery can vary, so an unverified stroke count should not be presented as a precise mass. Keep the equipment identification and any quantity-verification basis with the job record, allowing the next review to compare what was specified with what was actually delivered.