Vision system productivity depends in part on maintenance and change-over time. Optics designed for the on-line environment can cost less over their lifetime than simple off-the-shelf hardware. We discuss ways to design vision optics that reduce and facilitate maintenance. In a flexible manufacturing environment, one production line may produce several different products each week. A fixed optical system cannot make the required measurements, while adjustable optics are not robust, and require long setup times. We have built vision system optics that use 'optical tooling' as an alternative. Optical components are pre-aligned on interchangeable tooling plates. Changeover is accomplished by bolting on a new plate, without further alignment. Pre-configured optical tooling is as robust as a fixed installation. There are a minimum number of adjustable components to be misaligned. Optical tooling makes vision optics more compatible with flexible manufacturing.