Blade Tensioning; Guide Post - Grizzly G0668 Owner's Manual

Blade Tensioning

Proper blade tension reduces the risk of blade
breakage and improves cutting performance.
To correctly tension the blade:
1. DISCONNECT BANDSAW FROM POWER!
2. Open the upper wheel door, and raise the
blade post and upper blade guide assembly
to the highest position.
3.
Check the side-to-side deflection of the blade
midway between the upper blade guide and
the table. The proper amount of deflection
should be approximately
pressure is applied (see Figure 18).
Note: The quickest and easiest way to check
blade tension is to use the Model H5408
Blade Tensioning Gauge for a recommend-
ed setting of 25,000–30,000 PSI (refer to
Page 31).
Figure 18. Blade deflection when correctly
tensioned.
4.
Make small adjustments to the blade tension-
ing handwheel, then rotate the top wheel by
hand several times before checking the blade
deflection again. Repeat this step until you
are satisfied.
5. Close the upper wheel door and reposition
the guide post.
G0668 20" Vertical Metal-Cutting Bandsaw
blade tensioning
⁄ " when moderate
3
8
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Guide Post

The guide post assembly is used for two purpos-
es: 1) To properly position the blade guard to pro-
tect the operator from the exposed blade between
the workpiece and the upper wheel housing, and
2) to position the upper blade guides close to the
workpiece for blade support.
In order to cut accurately and safely, position the
bottom of the upper blade guides approximately
⁄ " above the workpiece—this positioning pro-
1
4
vides the greatest blade support and minimizes
the amount of blade exposed to the operator dur-
ing operation.
To properly position the guide post:
1.
DISCONNECT BANDSAW FROM POWER!
2. Loosen the guide post lock knob (see Figure
19).
Guide
Post
Elevation
Handwheel
Blade
Guard
Blade Guides
& Air Nozzle
Figure 19. Guide post assembly.
3.
Use the guide post elevation handwheel to
position the bottom of the upper blade guides
approximately ⁄ " above the workpiece, then
1
4
re-tighten the lock knob.
NOTICE
To prolong blade life, release the tension on
the blade if the machine will be idle for an
extended period of time.
Guide Post
Lock Knob
Guide Post
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