Thu, 23 May 2013 09:59:15 GMT Ponoko - Items by ticktock tagged with repair http://www.ponoko.com/showroom/ticktock/6775 This is a replacement sprocket for existing clocks. It could be used as an upgrade, or to replace a damaged one. It can be installed easily by removing the allen bolt that supports the main shaft, and swapping this part into place. This replacement sprocket ONLY works if your existing sprocket has 12 teeth - actually it will have 11, plus one missing tooth. I will need some additional information regarding your existing style of clock to ensure that I ship you the correct part. You will need to count the number of teeth on the rear sprocket, which is driven by the small chain. It should be either 48 or 36 teeth.<br></br><img alt="New_sprocket_showroom_image" src="http://static3.ponoko.com/design_images/images/32168/6b903e06-225b-ad8e-7aac-5af27b5201db/new_sprocket_showroom_image.jpg?1322573147" /> Tue, 29 Nov 2011 13:28:48 GMT http://www.ponoko.com/showroom/ticktock/6775?time=Tue+Nov+29+13%3A20%3A28+UTC+2011 ticktock