Why Use Different Parting Tools? archive
Friday 17 August 2012
Philip Greenwood looks at the four main types of parting tool available to the woodturner and the different roles they playError loading Partial View script (file: ~/Views/MacroPartials/cwsGalleryImages.cshtml)
I am often asked why I have four different parting tools. Well, this depends on the job that I am using the parting tool for. Do you need to buy four parting tools? No, you should buy them as you need them. Buy the 3mm (1/8in) standard parting tool as your first choice. Can one parting tool do all the jobs? I would say no. My main two are the standard and thin parting tools; the diamond and fluted are the two that I use the least, but are still used regularly for jobs that may require alternative parting tools.
Standard parting toolThis is the tool I use the most. The standard parting tool will cover most jobs in the workshop. Mine is the 3mm (1/8in) wide version. The angle is 25° on both sides; I find this angle works best for me. If I am only parting a short distance into the wood - around 12mm (1/2in) or 12.5mm - I will cut this in one go. If deeper, then take a second small cut around 1mm (3/64in) wide to give clearance to the parting tool; this will prevent any snatching and reduce the heat build up.
Diamond parting toolThis is named as the end of the tool is diamond shaped.
I use the diamond style of parting tool if I am cutting a wider groove. Mine is 5mm (3/16in) wide. I can cut a lot deeper with this type than with the standard type without a clearance cut. The shape of this tool means that only a small portion of the tool is in contact with the groove sides, which will reduce the friction.