The Jacobs hobber, while not sturdy enough for production work is capable, with simple modifications, of performing most of the functions of an industrial universal gear hobbing machine. A great variety of satisfactory spur, helical and worm gears can be made in most sizes required by the model engineer. As well as the standard powered cross feed, automated plunge and tangential feeds can be accommodated. The range of gears that can be made is illustrated in photo 30 and photo 31. If any reader would like further details, or a copy of the Excel gear calculator spreadsheets, please contact me through the Model Engineer Forum~4 thread titled "Gear Hobbing (mechanical)".
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