South Bend Swarf

[HopperParticipant @hopper]

When we were apprentices the South Bend book was referred to as "How to Ruin a Lathe" and there were a couple who seemed to take it to heart.

On setting the top-slide to 30-degrees for screwcutting UNF etc, you get the same effect by leaving the top-slide in the "normal" position parallel to the lathe bed. Then for every thou you wind the cross slide in, advance the top slide by half a thou. So if taking a 5 thou cut, advance the top-slide 2.5 thou.

For BSW etc, use a 55 degree tool and follow the above procedure but deduct a gnat's whisker of advance from the topslide.

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