I made a parting tool holder that holds the tool upside down on the back of the cross slide and run the motor backwards (with a clamp for the screw-on chuck). ?This works great. We had long discussions on the Boxford Users Group (io). ?I think the main difference is that the swarf drops out with gravity and does not get jammed in beside the cutting tool. There are many theories. ?Often I just use an ordinary QCTP and only bother to set up the reverse rotation if I am having trouble.
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Evan
Lathe: 1955 Boxford Model A with screw cutting gearbox, power feed with several accessories, hand tools and a pillar drill press.
Try my Free Online Gear train Software:
You enter a thread pitch or TPI and it shows you a range of gear trains and gearbox setting to use and even a scale drawing of the gear train.
It also includes calculations for taper turning by the tailstock offset method, and cutting speeds.
It includes the specifications for many thread types eg metric, UNC, BSW, and BA.
Displays drill sizes for tapping threads at any percent thread depth (with full explanations).
My YouTube Channel and Playlist about using an engineers lathe: ?
Project to build a Greek Hero steam engine and measure its power output:?
Evan