Friction, fit and powder removal are the three factors in play with axle design for SLS manufacturing. Manage friction by applying 1-2mm rails on the static ‘not stressed’ side of the assembly. Keep the clearance between the rails axle tube at 0.3mm. In regions away from the rails, a clearance of 2mm+ will enable complete and easy powder removal by blowing compressed air through the powder removal access ports modeled into the static side.
First seven members join NG’s Great Grid Partnership
So in addition to (as seems likely) Great British Energy & Great British Railways we also have the Great Grid Upgrade To me, this rather … grates?