"&)"
BdYZaI'&(''B[\
#
V[iZg'$%.
Bending Sheet Metal
Do not operate the Model T21322 unless
it has been securely clamped in place or
mounted to a workbench, or it could tip over
on you, causing an injury!
To perform a basic bending operation:
1
# >[ndjX]dhZidjhZi]Zdeedh^iZ[^c\ZggZXZ^k"
ZgK"\gddkZl]^X]^hVY^[[ZgZcih^oZ!addhZc
i]ZadX``cdWhVcYha^YZi]ZgZVghided[[d[
i]ZhjeedgigdYh
Figure 13
#
Figure 13
#
GZVghide#
7ZcY^c\ h]ZZi bZiVa ha^\]ian X]Vc\Zh i]Z aZc\i]
d[i]Zldg`e^ZXZ#8dbeZchVi^c\[dgi]^hX]Vc\Z^h
XVaaZYWZcYVaadlVcXZ#Ine^XVaan!WZcYVaadlVcXZ
bjhi WZ YZiZgb^cZY l]Zc eaVcc^c\ i]Z hiVgi^c\
aZc\i]d[i]Zldg`e^ZXZVcYedh^i^dcd[ndjghXg^WZ
a^cZh#>[WZcYVaadlVcXZ^h^\cdgZY!ndjgegd_ZXidg
^ihWZcih^YZhbVnWZadc\Zgdgh]dgiZgi]Vcndj
dg^\^cVaan ^ciZcYZY! YZeZcY^c\ dc l]Zi]Zg ndj
bZVhjgZ [gdb i]Z djih^YZ dg ^ch^YZ d[ i]Z WZcY
hZZ
Figure 12
#
Bend Allowance
Figure 12.
JcYZghiVcY^c\]dlWZcYVaadlVcXZ
V[[ZXihhiVgi^c\ldg`e^ZXZaZc\i]#
b
a
a
b
a
b
L
t
BA
BA
a
b
BD
BD
L
t
2IdiValdg`e^ZXZaZc\i]WZ[dgZWZcY^c\
a
2GZfj^gZY[^c^h]ZY]Z^\]i
b
2GZfj^gZY[^c^h]ZYaZc\i]
BA
27ZcYVaadlVcXZ
BD
27ZcYYZYjXi^dc
>ch^YZBZVhjgZbZcih/A
i
2V W 76
Djih^YZBZVhjgZbZcih/A
i
2V W¶79
7ZcYA^cZ
7ZcYA^cZ
IdeK^Zl
H^YZK^Zl
IdeK^Zl
H^YZK^Zl
L
t
7ZcY^c\ deZgVi^dch gZfj^gZ i]Z [^c\Zgh id WZ ^c
a^cZ l^i] i]Z [^c\Zg gZXZ^kZg# L]Zc bdkZY! i]Z
[^c\Zgh adlZg ^cid i]Z [^c\Zg gZXZ^kZg l]ZgZ i]Z
i^eh d[ i]Z [^c\Zgh ejh] i]Z bZiVa ^cid i]Z [^c\Zg
gZXZ^kZgK"\gddkZ#6hVgZhjaiVWZcYdXXjgh#>[V
eVcdgWdmWZcY^hYZh^gZY!X]ddhZV[^c\ZgdgV
hZaZXi^dcd[[^c\Zghi]ViVgZVhXadhZVhedhh^WaZid
i]ZaZc\i]d[i]ZeVcdgWdmh^YZaZc\i]h#GZbdkZ
i]Z [^c\Zgh i]Vi bVn ^ciZg[ZgZ l^i] i]Z WZcY# ;dg
hbVaaZgWZcYh!i]Z[^c\ZggZXZ^kZg^hgZkZgh^WaZhd
i]Zh]VaadlZgK"\gddkZ^hZmedhZY#
Tip:
During a bending operation, the fingers push
the sheet metal down into the groove of the finger
receiver. As the sheet metal slides down into the
groove, scoring may occur. To avoid these marks,
keep the receiver free of burrs, and adhere a strip
of tape on the workpiece along the location to be
bent.
I]Z Y^hiVcXZ cZZYZY id VXXdjci [dg WZcY Vaadl"
VcXZ ^h bV^can V[[ZXiZY Wn ldg`e^ZXZ i]^X`cZhh
VcY WZcY gVY^jh# H^cXZ i]Z BdYZa I'&('' dcan
WZcYhi]^ch]ZZibZiVal^i]i^\]igVY^^!WZcYVaadl"
VcXZl^aadcanb^c^bVaanV[[ZXiegd_ZXihbVYZl^i]
i]^hbVX]^cZVcYbVncdiZkZcWZcdi^XZVWaZ#
IdaZVgcbdgZVWdjiWZcYVaadlVcXZVcY]dlid
XVaXjaViZ^i!gZ[Zgid
Machinery's Handbook
dgi]Z
^ciZgcZi#