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The title "Cutting with a rotating cutter" made me think you might be making a polygon cutter for making square, hexagonal, pentagonal shafts etc. You are half way there with gears on the end of the leadscrew! ?My online program RideTheGearTrain includes a simulation of the polygon cutter so that you can vary the number of cutters on the spinning cutter head, vary the gear ratio between leadscrew and spinning cutter, and vary radius to see what effect it has:
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I also have ? about it, including links to other YouTube videos of actual devices.
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In this link you may also find when you scroll down quite a bit, an indexing device bush fix that I made using a small circular saw blade and I can substitute a range of change gears. The clicker I made for this makes it quite positive and precise: A broken hacksaw blade lifts up on a tooth of the saw blade and clicks off the edge of the tooth. Turn the check back a bit and the saw blade registers nicely on the straight edge of the saw tooth. It is prevented from bending backwards by a metal support on the underside of the blade. the blade I am using has 24 teeth and it is precise enough for at least 24 divisions, 12, 8, 3, 2, 4 etc.
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I hate the fact that if I leave this post to find the link I want, I will loose the post I have already written. It has happened many times!
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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