28.1 DRILLING AND REAMING
The lathe can perform may operations other than turning.
It is sometimes used to drill, ream, or bore holes. A lathe can
also be used to perform knurling, filing, polishing, grinding,
and milling operations.
28.1.1 Drilling on a Lathe
The usual method for drilling on a lathe is to hold the work
in a chuck and mount the drill in the tailstock spindle. Drilling
is accomplished on a lathe by feeding the stationary drill into the
rotating workpiece. For holes less than 1/2″ (12.5 mm), the drill
is held in a Jacobs chuck, Figure 28-1. Larger drills with taper
shanks are fitted directly into the tailstock spindle, Figure 28-2.
Drills with taper shanks too large to fit the tailstock
spindle can be used if mounted as shown in Figure 28-3A. A
lathe dog is fitted to the neck of the drill. The tool is set up to
permit the tailstock center to press into the center hole in the
drill shank. Otherwise, a commercial drill holder may be used.
This is shown in Figure 28-3B.
449
Other Lathe
Operations
arbor press
automatic screw machine
boring
computer numerical control
knurling
mandrel
reaming
tool post grinder
turret lathe
vertical boring machine
LEARNING OBJECTIVES
After studying this chapter, you
will be able to:
• Set up and safely operate
a lathe using various
work-holding devices.
• Perform drilling, boring,
knurling, grinding, and
milling operations on a lathe.
• Demonstrate familiarity with
industrial applications of
the lathe.
TECHNICAL TERMS
Work
Compound
Tail-
stock
Figure 28-1.
Drilling with a straight shank drill held in a Jacobs chuck.