Rusty ball-bearing in dire need of some lubrication.

Leonardo Da Vinci is by some named the inventor of the ball bearing but the already the Romans used wooden ball bearings. The first modern ball bearing was patented by Philip Vaughan, a Welsh inventor, in 1794.

Sven Wingquist, a Swedish inventor invented a self-aligning ball bearing in 1907. This revolutionary invention became the foundation for one of Sweden’s most successful international companies, SKF. SKF stands for Svenska Kullager Fabriken, simply Swedish Ball Bearing Factory.

My first two and half years I lived across the street from the huge factory with its fasade of red clay bricks. Now a trip to Gamlestaden in Göteborg must be planned for some photos.

Aim for a smooth ride, ha de Gött!

• National Day
• Acrobat
• Smooth rock
• Spring green
• Backlit