Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
R17
4300
Catalog
Equipment
Dimensions and pressures for reference only, subject to change.
Table R4 — Mandrel Sizes
Fig. R33 — Mandrel
Fig. R34 — Mandrel Rods
Mandrels (Plug Type)
For use with Exactol Models 412, 424 and the HB632 benders.
Mandrels ensure smooth bends without kinking, or wrinkling
when bending thin-walled tube, or when making short-radius
bends. Mandrels support the tube wall from the inside to keep
it fully open for a smooth bend.
A rule that is generally followed to determine whether or not
a mandrel is necessary is as follows:When the wall thickness
of the tube to be bent is 7 percent or more of the tube O.D.,
a mandrel is usually not necessary. On wall thicknesses that
range between 4-6 percent of the tube O.D., it is necessary
to use a mandrel to avoid wrinkling and flattening in the bend
area. This rule is based on a bend radii of between three and
four times the tube O.D.
Part Number Example:
924417-
Size X Wall Thickness =
924417-12
X058
*
See
Fig. R32
for mandrel usage.
To order mandrel, specify tube O.D. and wall thickness.
Mandrel Rods
For use with the HB632 Model Bender and Exactol Models
412/424
benders. Mandrel rods (as well as a mandrel rod stop
assembly) are required when using mandrels. Mandrel rod
diameters are determined by tube I.D.
Mandrel Rod Sizes
Mandrel
Rod Dia.
Tube I.D.
(
in.)
(
in.)
Part No.
1/4
.283
to .362.......................................................
520506
5/16
.363
to .484.......................................................
520507
13/32
.485
to 1.489......................................................
520508
5/8
1.49
to 1.87 .....................................................
520509
Benders
Size
END
SIZE
(
in.)
Wall Thickness
(
in.)
(
in.)
(
in.)
(
in.)
(
in.)
6
3/8
— 0.035 0.042 — —
8
1/2
— 0.035 0.042 0.049 —
10
5/8 0.035 0.042 0.049 — —
12
3/4 0.035 0.042 0.049 0.058 0.065
14
7/8 0.035 — 0.049 0.058 0.065
16
1 0.035 0.042 0.049 0.058 0.065
18 1 1/8 — 0.042 0.049 — 0.065
20 1 1/4 — 0.049 — 0.065 0.095
24 1 1/2 0.049 0.058 0.065 0.083 —
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