-18-
Figure 42. 4-way tool post.
Tool Post Bolts
Cutting Tool
Figure 43. Cutting tool aligned with
workpiece center.
4-Way Tool Post
The four-way tool post is mounted on top of the
compound slide, and allows a maximum of four tools
to be loaded simultaneously.
The four-way tool post allows for quick indexing to
different tools. This is accomplished by loosening
the top handle, rotating the tool post to the desired
position, then re-tightening the handle to lock the tool
into position.
To load the tool post :
1. Choose the desired cutting tool.
2. Loosen the tool post bolts so that the cutting tool
can
fi
t underneath them.
3. Firmly secure the cutting tool with at least two tool
post bolts, as shown in Figure 42.
Aligning Cutting Tool with Tailstock
Center
For most operations, the cutting tool tip should be
aligned with the spindle center line, as illustrated in
Figure 43.
There are a number of ways to check and align the
cutting tool to the spindle center line. Below are two
common methods :
• Align the tip of the cutting tool with a center
installed in the tailstock. For this to work, the
tailstock must be aligned to the spindle center
line.
•
Make a facing cut on a piece of round bar stock.
If the tool is above/below the spindle center line,
a nub will be left in the center of the workpiece.
Adjust the height of the workpiece, then repeat
the facing cut to check the adjustment. Repeat
as necessary until the center of the workpiece is
smoothly faced.
To align the cutting tool with the tailstock center :
1. Mount the cutting tool in the tool post, then turn
the tool post so the tooling faces the tailstock.
2. Install a center in the tailstock, and position the
center tip near the tip of the cutting tool.
3. Lock the tailstock and quill in place.
4. Adjust the height of the cutting tool with a steel
shim, so the tip just touches the end of the
tailstock center.
Apron Stop
Use the adjustable apron stop collar to set the location
where the carriage will be disengaged by the feedrod
friction clutch.
When the adjustable apron stop contacts the stop
collar during a longitudinal feeding operation, the
clutch disengages the feedrod from the apron and the
carriage movement stops.
Figure 44. Apron stop and collar.
Stop Collar
Apron
Apron Stop
