# How can a steel cylinder be parted in concentric rings with small gaps between them?

For a project, I have to part steel round stock, like the cylinder in Fig. 1, but not perpendicular to the symmetry axis (like a bread in slices) but in concentric rings 3 inch long and having the outer diameter as close as possible to 6 inch, 5 inch, ... , 1 inch.

I mention that I have little experience with machine shops and the capabilities of the tools existent there.

Question: What is the minimum gap I should expect between two consecutive rings, say the one with the ideal diameter of 6 inch and that with the ideal diameter of 5 inch (see Fig. 2)? Can this minimum gap be of the order of 1 mm or it has to be larger like 3 mm, 5 mm, etc. in width?

Fig. 1. 12L14 Steel Round Rod: 6″ Dia, 3″ Long

Fig. 2. Two concentric rings with the outside diameter as close to 6 and 5 inch respectively.

• What is the length of the cylinder
– AJN
Apr 8 at 4:18
• @AJN : The length of the cylinder is 3 inch and the diameter 6 inch. You can click the link below Fig. 1 for the characteristics of this solid cylinder. Apr 8 at 4:26
• So make a cutting tool that will do the 3mm width, considering the depth you have available to provide the strength needed to cut at the distance from the support you need. Apr 8 at 14:51
• @SolarMike , I calculated that a parting lathe knife like here: youtube.com/watch?v=fZlWJ_JqQtA , could make the cut in Fig. 2 with the gap width about 3 mm if the free part of the knife is 1 cm x 2 mm x 1+1/2 inch. Does such a thin knife exist? (I repeat I am not a machinist.) Apr 8 at 15:09
• Sounds like that will vibrate, chatter and break, Check out boring bars. Note they are not places that sell alcohol & poor music. Also parting tools. Apr 8 at 15:29