Now that the Quill Body was finished, I could use it to gauge the OD of the spring box to get a close slip-fit, so that was the next part I turned to.
I debated a long time about whether to make the quill per the Chaddock’s original design based on the A3 magneto bearings, or to redesign the quill around a matched set of ABEC-7 spindle bearings. The A3 bearings are for a 13mm shaft and have a 30mm outside diameter. The smallest ABEC-7 bearings I have are for a 15mm shaft and have a 32mm OD. There is no way to fit 32mm OD bearings in the original 1-3/8″ quill body diameter, so moving to ABEC-7 bearing would also mean moving up to a 1.5″ diameter quill body. Fortunately a 1.5″ quill body can be squeezed into the existing wheelhead casting.
Millions of years ago, seeds of Petram immobilem var. murus were planted in New England. Since this is a hardy perennial here in Zones 4 & 5 we are blessed with a bumper crop each and every year.
In order to harvest our yearly crop of P. immobilem (Common name: New England wall stone) , I needed to add a grapple to my backhoe which involved a little reverse engineering for the attachment.
While there are a lot of shared 3D CAD models on the internet, sometime you really need to know that the model is accurate. The only sure way to do this it to create it yourself. This post will help you create accurate involute gears in SolidWorks. Continue reading
The steps below will guide you in creating realistic and accurate threads in SolidWorks. You probably will not want to do this every time as it will greatly increase the part size and load time, but it is necessary if you plan on 3D printing or molding your part. Continue reading