Lathe Requirements - Grizzly T27400 Owner's Manual

Lathe Requirements

The Model T27400 is designed to fit on metal
lathes with a 12"–22" swing and a 1" diameter
tool post.
IMPORTANT: Although the Model T27400 will fit
on lathes meeting the size requirements specified
above, this does not imply or guarantee that it will
allow enough clearance to work with the full swing
of the installed lathe. Once installed, the maximum
possible workpiece swing allowed is determined
by the distance from the tool post centerline (with
cross slide positioned fully backward) to the lathe
spindle centerline, minus the required installation
space for the tool post grinder (approximately 7").
External Wheel Clearance
The distance between the tool post centerline and
the outside grinding surface of a new 6" external
wheel is approximately 7" when the grinder is
installed, as illustrated in Figure 3. Ensure that
your compound slide can safely accommodate
this distance from the workpiece prior to powering
machine. Smaller lathes may require additional
compound slide adjustment, or require small
diameter workpieces.
Height
Tool Post
Tension
Bolt
Guard
Approx. 7"
Lathe Compound Slide
Figure 3. External wheel alignment.
Model T27400 (Mfd. Since 02/15)
External
Lathe
Wheel
Spindle
Centerline
Workpiece
A
Tool Post Size
The maximum tool post diameter the grinder can
accommodate is 1". If the diameter of your tool
post does not allow you to secure the grinder to
the compound slide without side-to-side move-
ment, make a bushing for the tool post that will
keep the grinder secured in place when the tool-
post nut is fully tightened down.
Note: The tool post grinder mounting hole clear-
ance may not allow for the lathe's tool post lever to
rotate fully. A new tool post nut and washer combi-
nation may be required to secure the grinder.
Centerline Alignment
When using an external grinding wheel, the cen-
terline of the grinder spindle should be approxi-
mately the same height as the lathe centerline for
proper contact with the spinning workpiece.
The grinder spindle centerline is adjustable from
1 ⁄ "–2 ⁄ " above the top of the lathe's compound
5 1
8 8
slide. Measure the height to the lathe centerline
from the top of the compound slide (distance A
illustrated in Figure 3) to ensure it is within this
range. Most lathe centerlines will be within the
adjustable range. If not, re-adjust the compound
slide and place the external wheel as close to
workpiece centerline as possible.
Once the grinder centerline is adjusted, tighten
the height tension bolt and nut to secure the dove-
tail in place.
IMPORTANT: You must adjust and retighten the
belt any time the centerline adjustment is changed
(see Tensioning/Changing Belts on Page 20).
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