how do i change multiple file names to the same name w/ a number value?

I use Windows machines and Macs at my office. In Windows I can take a group of files, let's say JPG's of a factory tour, and when I upload them into Windows, I can "select all", right click and chose "rename". I rename the first file "102511 Widget Tour (1)" and press "enter" Windows automatically renames all the JPG's to "102511 Widget Tour" and progresses the number in the parentheses. In OS X there is not even a "rename" function when multiple items are selected. I've looked at using Automater, but it seems that I would have to construction a new action each time. Any ideas?