Broaching Keyways with the Lathe

[Paul Jones]

olderdan,

How about a simple miniaturized clutch assembly with two small rotating plates and an adjustment nut with a compression spring that put pressure from behind on one plate and the friction between the two causes the clutch to slip when too much resistance occurs on the output shaft due to the tool jam.



I don't have access to my CAD so I quickly (and very crudely) drew the clutch cross section in Excel to help with my explanation. Sorry about the drawing.

Paul