Tennsmith Inc. / 6926 Smithville Hwy. / McMinnville, TN 37110 / 931-934-2211 / Fax 931-934-2220
www.tennsmith.com
BLADE GAP ADJUSTMENT
The factory setting for the gap between the upper and lower blade is .002. This setting was achieved using
a piece of shim stock. However, if this is unavailable, the thickness of news print will approximate this
dimension. The factory setting is the optimal clearance for the entire range of material likely to be sheared
on this machine. Different materials and thickness may require a larger or slightly smaller clearance. If you
have any specific questions regarding optimal blade gap, please consult Tennsmith.
To begin, loosen the four bolts (24) securing the table (1) to the side panels (4, 5). Pull the table towards
you and depress the foot pedal (79) fully. Standing on the foot pedal, start on the left hand side (facing) of
the shear by snugging the table bolts. Next, insert the shim stock between the upper and lower blades.
Tighten the table adjusting screw (21) until the shim is held fast between the blades. Then, keeping upward
tension on the shim stock, progressively tighten the table locking screw (22) until the shim stock is freed of
pressure and can be removed. Retighten the table bolts and repeat the procedure on the opposite side of
the shear.
After completing alignment, check the entire length of the blades for proper clearance using your shim stock.
You may find that you either have too much or not enough clearance in the center of the blades. This
adjustment is accomplished by increasing or decreasing pressure on the bow adjustment bolt (41) located at
the rear of the cutter bar.
Note: A properly aligned shear will produce a scissor like sound when the blades transcend and will
leave a minimal burr on sheared stock.
CUTTER BAR ADJUSTMENT
The cutter bar (2) should move freely throughout its range of travel without binding. This should be the case
with a new shear. If the shear does bind, recheck for levelness.
The gibs should adjusted for snug yet nonbinding movement. To accomplish this, loosen all six gibb screws
(36). Beginning at the right hand side of the shear, depress the foot pedal fully and lock the center gibb
screw so that the cutter bar remains down. Then, gradually loosen the screw until the cutter bar returns to its
upright position. Proceed to back the screw off an additional quarter turn and lock the jam nut (37) in place.
Continue by repeating this procedure for the remaining gibb screws.
Cutter bar lift is controlled by the amount of pressure exerted by the pedal springs (46). Appropriate tension
was applied to the springs at the factory. However, over a period of years the springs may fatigue slightly
and require additional compression.
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