Grizzly G9979 owner manual Blade Tensioning, To correctly tension the blade

6.Position the back edge of the blade so that it is next to, but not against, the flange of the top wheel (see Figure 22).

Note: Excessive blade contact with the wheel flange during operation could lead to blade and wheel damage.

Wheel

Flange

Blade

Figure 22. Back edge of blade next to wheel

flange.

7.Rotate the top wheel by hand several times to make sure the blade tracks evenly without wandering across the wheel surface.

Note: If the blade does wander across the wheel and away from the flange, the wheel alignment may need to be adjusted. Refer to Wheel Alignment on Page 42 for detailed instructions.

8.Re-tension the blade (refer to Blade Tensioning on this page).

9.Check the upper and lower blade guides for clearance (refer to Adjusting Blade Guides on Page 31).

Note: Generally if the replacement blade is the same gauge, width, and type, blade guide adjustment is not necessary. Otherwise, you must adjust the blade guides.

10.Close and secure the upper and lower wheel doors.

G8144Z/G8145Z/G8146Z (Manufactured Since 6/11)

blade tensioning

Blade Tensioning

NOTICE

To prolong blade life, release the tension on the blade if the machine will be idle for an extended period of time.

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 3⁄8" when moderate pressure is applied (see Figure 23).

Note: The quickest and easiest way to check blade tension is to use the Model H5408 Blade Tensioning Gauge to reach a blade tension of 25,000–30,000 PSI (refer to Page 36)

Approximately 3/8"

Blade Deflection

Figure 23. Blade deflection when correctly

tensioned.

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