These could have been filled with wooden SHIMS but the workmen did not stop to think of that.
"If You're Going to Live in the Country"
Thomas H. Ormsbee and Richmond Huntley
They had to use the cone bearings, but in order to protect the fine channellings for oil they'd have to use cone-shaped SHIMS at the beginning while running at low speed.
"Space Platform"
Murray Leinster