Additional examples are adjusted to the entries in an automated way - we cannot guarantee that they are correct.
The lower drill bit is the jobber or parallel shank equivalent.
In tapered or parallel shanks Spring loaded live centres are ideal for working on shafts where expansion due to heat is a problem.
Parallel shank twist drills, up to 13 mm diameter, are held in a Jacobs pattern drill chuck fitted in the lathe tailstock spindle.
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