Grizzly T28325, Руководство пользователя

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-18-
Model T28325 (Mfd. Since 1/18)
When a bend is made in sheet metal, the inside
surface of the bend compresses and the outside
surface stretches. To bend metal objects accu-
rately, you need to consider the length of each
bend, especially when more than one bend is
required. This is called bend allowance.
The bend allowance is added to the sum of the
outside dimensions of the workpiece flat surfaces
to obtain the overall length and width of the blank
needed to make a particular part.
Exact allowances can only be obtained by trial due
to differences in sheet metal hardness, whether
the bend is with or across the grain, and difficul-
ties in making an exact bend radius. Formulas for
calculating the bend allowance can be found in
metalworking handbooks or the internet.
Bend Allowance
When the clamping pressure is correctly adjusted,
the foot pedal lock plate (see
Figure 16) will
spring forward and secure the foot pedal down
when it is fully depressed.
Figure 16. Using the foot pedal.
Foot
Pedal
Foot Pedal
Lock Plate
Adjusting Work Stop
The work stop mechanism allows the operator to
produce repetitive bends at the same angle.
Item(s) Needed Qty
Hex Wrench 8mm .............................................. 1
Wrench 16mm ................................................... 1
To adjust work stop:
1. Loosen clamping cap screw on work stop col-
lar (see Figure 17) so stop collar is loose on
shaft.
2. Raise bending leaf to correct angle.
Note: The scale on the work stop collar dis-
plays the relative angle of the bending leaf.
3. Rotate work stop collar clockwise until it rests
on stop block, then re-tighten clamping cap
screw to secure setting.
Note: If needed, loosen the hex nut on the
adjustable stop cap screw, then use the cap
screw for additional adjustment.
Figure 17. Work stop controls.
Clamping
Cap Screw
Adjustable
Stop Cap
Screw
Stop
Block
Scale
Bending
Leaf
Work Stop Collar
Make sure the clamping pressure is cor-
rectly adjusted for the workpiece thickness
to prevent workpiece or machine damage
when the foot pedal is fully depressed.
We recommend that the foot pedal always be
locked down after positioning the workpiece and
before making the bend. This will help ensure
the workpiece stays in the proper position during
bending.