Southbend SB1059F User Manual

For Machines Mfg. Since 3/11

EVS Toolroom Lathe w/DRO

-43-

This tailstock uses a quill with an MT#5 taper 
that has a lock slot in the back of the bore that 
accepts tang arbors and drill bits (see Figures 
40–41 for examples).

However, other tooling without tangs, such as 
the four remaining tools shown in Figure 40, 
can still be used if the potential load will not 
exceed the strength of the tapered fit. For 
example, this includes smaller drill chucks, drill 
bits, and centers.

If the tooling has an open hole in the end 

but is too short to be exposed in the drift slot 
for removal, then a screw can be threaded into 
the end of the tool to provide a solid surface for 
the quill pin to push against when the quill is 
retracted for tool removal. Otherwise, removal of 
such tooling may be difficult.

  With the tailstock locked in place, unlock the 

quill, then use the handwheel to extend it 
approximately 1".

Thoroughly clean and dry the tapered 
mating surfaces of the quill and the center, 
making sure that no lint or oil remains on 
the tapers.

If the tapered tool shaft has a tang, align 

it with the slot in the back of the quill before 
seating it.

  With a firm and quick motion, insert the 

tool into the quill. Check to see if it is firmly 
seated by attempting to twist it—a firmly 
seated tool will not twist.

  Unlock the tailstock and move it until the tip 

of the tool is close to, but not touching, the 
workpiece, then re-lock the tailstock.

  Start spindle rotation, unlock the quill, then 

turn the tailstock handwheel clockwise to 
feed the tool into the workpiece.