Even though the series themselves do not expose such functionality, the category axes have a Gap property that can be used. http://help.infragistics.com/NetAdvantage/DV/2011.2/CLR4.0/?page=InfragisticsSL4.Controls.Charts.XamDataChart.v11.2~Infragistics.Controls.Charts.CategoryAxisBase~Gap.html .  The default values appears to be 0.2 and the highest usable value 1, where 1 seems to represent a relation between the gaps : columns’ width / bars’ height = 1:1. OF course this is not completely true as there are some deviations coming from the columns’ and bars’ templates properties like alignment, padding and margins.