4. Attach the guide plate to the guide holder.
The following procedures apply when you do the
work on a lathe. See figure 4-39 for an example of a
lathe setup.
5. Mount the floating chuck in the lathe tailstock
spindle and place the drill in the chuck.
1. Place the work to be drilled in the lathe chuck.
Tighten the setscrews to hold the drill
The work must have a cylindrical outside
securely.
diameter and the intended location of the
angular hole must be in the center of the work.
6. You are now ready to drill the angular hole.
2. Place the guide holder over the outside
Do not force the drill into the work too rapidly,
diameter of the work and tighten the setscrew.
and use plenty of coolant.
If the bore in the back of the guide holder is
larger than the diameter of the work, make a
sleeve to adapt the two together. If the part to
The following procedures apply when you drill an
be drilled is short, place it in the guide holder
angular hole on a drill press. Clamp the guide plate
and place the guide holder in the chuck.
directly to the work and drill the pilot hole by using a
slip bushing placed in the guide plate to ensure
3. Drill the pilot hole at this time. The size of the
alignment. Once you have positioned the work under
pilot hole should be slightly smaller than the
the drill press spindle and have drilled the pilot hole,
distance across the flats of the angular hole.
do not move the setup. Any movement will cause
The manufacturer makes specific recom-
misalignment between the work and the angular drill.
mendations on pilot hole sizes.
4-25
