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Model M1118 (For Machines Mfd. Since 09/21)
Basic.Bending
All bending operations require the clamping fingers to
be parallel with the edge of the clamping surface and
bending block, and the setback and clamping pressure
must be correctly adjusted for the thickness of the
workpiece.
To.perform.basic.bending.operations,.do.these.steps:
1. Determine setback required for bend and adjust
machine if needed (refer to Adjusting.Setback on
Page.17).
2. Raise clamping leaf.
3. Insert workpiece between clamping fingers and
clamping surface.
4. Align bend mark(s) on workpiece with fingers, then
clamp it in place using clamping handles.
Note: If clamping handles do not lock, the clamping
pressure may need to be adjusted (refer to
Adjusting Clamping Pressure on Page 18).
5. With body square to brake and using both hands, lift
bending leaf until workpiece reaches desired bend
angle.
6. Raise clamping leaf and remove workpiece.
Bending.Allowance
When a bend is made in sheet metal, the inside surface
of the bend compresses and the outside surface stretches.
To bend metal objects accurately, you need to consider
the length of each bend, especially when more than one
bend is required. This is called bend allowance.
As a rule of thumb, subtract the bend allowance from the
sum of the workpiece outside dimensions to obtain the
overall length and width of the blank needed to make a
particular part.
Exact allowances can only be obtained by trial and error
due to differences in sheet metal hardness, whether the
bend is with or across the grain, and the bend radius.
Use metalworking handbooks or the internet to find bend
allowances accurate enough for average use.
Do. not. operate. machine. unless. it. has.
been.securely.mounted.to.a.workbench,.
or. it. could. tip. over. on. you,. causing.
severe.injury!
Bodily.injury.could.result.from.using.this.
machine.. Always. wear. safety. glasses,.
leather. work. boots,. and. heavy. duty.
leather. work. gloves. when. operating.
this. machine. or. whenever. handling.
sheet.metal.
Hold.onto.the.workpiece.so.it.does.not.
drop.and.hit.you.when.it.is.released!
Sharp. edges. of. sheet. metal. can. easily.
cut.fingers,.hands,.or.other.body.parts.
Always. wear. leather. gloves. when.
handling. sheet. metal,. and. always.
chamfer.and.deburr.the.edges.
-19-
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